Kirby Explanations

Please make Content Revision, General Discussion or Q&A threads with at least the "Kirby (Series)" tag to properly question, try to modify, disagree or bring new information about anything.
==Sometimes things that don't make sense are canon==
Premise: As we know, things that happen in the series that appear to don't make sense and/or to be Game Mechanics aren't canon and/or don't actually happen unless proven otherwise to be canon/to do actually happen, like in any verse. However, to a degree, nonsense like it (Called "mysteries") are meant to be real in-universe, even without the explicit proof that sets them as real, and as such some degree of open-mindedness needs to be given to cases that aren't explicitly proven to be canon on their own. Especially if they're similar other things already proven to be canon. Specifically, this cases are easier to be seen as Toon Force, with creatures being said to "defy all reason", but it's also possible that they use powers that are logical in-universe and simply not elaborated upon. The setting itself has this Toon Force or lack thereof.
Evidence: Let's show the statements first, then what they refer to in-game & how a reasonable person would take that at glance.
Masahiro Sakurai interview from the Kirby 25th Anniversary orchestra concert pamphlet (Translated):
*Since Kirby's Dream Land Kirby could duplicate himself, he did so in that game with a left and right Kirby around himself. Any reasonable person could say that he doesn't canonically duplicate, since he only does so during victory dances. Then the series gave a lot of consistency and comments pointing out this power, making clear it's something that does happen.
*The next 2 were reasonable powers.
*Kirby's said to be "able to do things that other characters cannot do naturally", which can refer to many things that one could disbelief at glance.
"Development Secrets of the Original Kirby [Grab Bag]" youtube video by Masahiro Sakurai on Creating Games:
*The things he talks about can be seen in the video. Either they're things hard to believe that one could dismiss if they didn't know any better, or are things easy to believe as powers simply not elaborated upon.
*I assume Kirby walking passed the text in the stage intro is a design choice and not a display of Breaking the Fourth Wall. But the context around it and how it's not the first time he's done that may imply otherwise.
*Note that he says "Kirby" at the end rather than Kirby, so it's the series rather than the character.
Conclusions:
*The idea of "mystery" refers to either 1. Toon Force, with things "[don't having] to make sense" and "that defy all reason", or 2. powers and the natural state of the world do making sense in-universe (not Toon Force) but simply not having been elaborated upon.
**Obviously I mean "mysteries" in this context of powers & things happening hard to believe/easy to dismiss. The series still has mysteries in the traditional sense.
*This "mysteries" are applied strongly in the Kirby series, if it may vary. It's understood "that there are people who cannot be convinced of unreasonable things unless they are explained one by one", but this doesn't stop those mysteries from do happening in-universe, therefore being canon. Likewise, when this type of things are referenced in statements simply as being mysteries, it supports them happening.
*However, this is not to say that absolutely everything you see always is canon just like the games portray it. It's simply supporting evidence that sets the stage for it. "Don't think! Just feel! Embrace the mystery!" is great for enjoying the games, but you do need to think things through when indexing the series for Vs Debates, even powers that work by not making sense need to be explained in a way that makes sense to avoid inaccuracies, and even characters with the ability to not make sense in certain things can have things that don't make sense even to them.
Examples of things supported by this: Either they somewhat benefit from how the setting doesn't have to make sense or would have otherwise been downright dismissed:
*Kirby's Dream Land:
** As shown in the video above:
*** The many, many Kirbys coming from a cloud when Kirby falls in it are implied to be Kirby duplicating himself.
***The Kirby-looking creatures are a real resource Dedede has. They don't do anything though.
***Touching those "Kirbys" blowing up all enemies on-screen did happen.
** Given what we know about this game and the Kirby series, it supports how Kirby can dance during a pause.
**How some characters revive themselves across the series.
**Dedede's castles getting sad when Dedede gets defeated (or because of the property damage they get) was canon since game 1.
*Kirby's Adventure: Kirby's ability to dream things that can hit him and using Copy Abilities w/o swallowing foes.
*Kirby's Dream Course: Keeby already exists well on his own, but it's easier to conceptualize him with this.
*Kirby Super Star and future games: Kirby's Normal Beam absolutely looks like just a game mechanic.
*Kirby's Star Stacker & Kirby's Super Star Stacker: Kirby's ability to create blocks would be easy to view as just game mechanics, at glance.
*Kirby: Nightmare in Dream Land and future games: It's easier to think how Kirbys of other colors called Kirby, that aren't our Kirby, exist.
*Kirby Air Ride: Explains why Warp Stars are machines in this game.
*Kirby Super Star Ultra: Meta Knightmare Ultra being canon. In that mode, Meta Knight sets up to trains and end up summoning Nova, but he somehow does all the quests Kirby already did in this game, even destroying his own ship, making it super nonsensical; Its last section is the part that's advertised by the mode in-game & the Jap. page of the game, and the final battle that happened there has been referred to as having happened. Meta Knight defeated someone with the title of "the strongest warrior in the galaxy" there, and in a non-canon mode of a future game Meta Knight was referred to "the strongest warrior", intuitively meaning that he gained that title, otherwise a non-canon mode would be referencing another non-canon mode as part of its continuity. But most notably, the Jap. website of the game has this to say about it: "Defeated by Kirby in "Meta Knight's Revenge," Meta Knight sets out on a journey of training to hone his skills. However, his journey becomes a strange one that follows each of Kirby's adventures one by one." Acknowledging how nonsensical the mode is.
*Kirby's Return to Dream Land:
** As of the year this game came out and before Planet Robobot, it makes it easier to accept the cast having gone so powerful. Though their tiers would have varied, with no one scaling.
*Kirby's Dream Collection Special Edition: As of the year this game came out, it makes it easier to accept the pocket spaces Magolor creates, even if other reasons already support it.
*Kirby: Triple Deluxe: It makes it easier to believe that the insane time skip wasn't accidental. It's similar to the Time Travel left to piece together in Return to Dream Land, or minimally the timeline of events of Susie's life in Planet Robobot, if that was all given away in an easily explainable, non crazy way. 
*Kirby Fighters 2: The many, many Kirbys, Bandana Dees, Gooeys, and Magolors fought in the story become easier to accept, regardless of them coming from a magical tower.
*Kirby's Return to Dream Land Deluxe: It makes it easier to accept how so many characters went to Merry Magoland in another reality, even a tree (that can walk & jump). It makes it easier to accept that Metal General and Landia would even want to go it, if technically no actions they do is contradictory to their personality, due to having so little of it.
==Drawcia's Feat ==
We claim that Drawcia turned interstellar parts of reality into a painting yet statements make this feat look far lesser. This part is a clarification of that.
*The opening of Canvas Curse says that she turned the land into painting, and later that Kirby finded himself in a world of paintings. 
**The Jap. opening, which is also narrated in an official encyclopedia, says something slightly different; Dreamland is the setting where Kirby is, then Drawcia came, drew in every space and turned it into a painting, so Kirby chases her into a world of painting. The difference in both versions is that in the former Drawcia turns the land into painting and in the latter she turns "every space" into it, which is suggested to be Dreamland but isn't stated to be just that.
*Interplanetary stuff we can find in her world of paintings include the sun, the moon and many stars in a level that takes place in space.
*At the end it's said that Drawcia wished for a world of painting.
*1 page of an Official Guidebook says that Drawcia was jealous of those living in the real world and she attemped to turn all of Deamland into a painting.
*Drawcia's figurine description in Kirby and the Rainbow Curse says that she turned Dream Land into a world made of paint ("transform Dream Land into a world of painting"). Granted, for context her description is pretty barebones, ends on a vague note and talking about Drawcia comes out of nowhere in that game.
*Descriptions of her sister say twice that she wants revenge on the real world, for a similar reason than Drawcia's and similar to Drawcia's motivation. Of course, Drawcia=/=Paintra.
*, despite Dreamland being a small contry in Planet Popstar.
In conclusion what's shown is more reliable than what's said. The descriptions can be seen as all over the place but she did turn at least interstellar parts of the real world, as that's what we see in her World of Painting. Her motivation would also be odd if she was jealous of those living in the real world yet she only attacked one small country.
As a side note and homework for others to do, we only have available 2 pages of the Jap. guidebook of her game, who knows what more redundancy or even new stuff it says about the "Spectacular Space" level, which takes place in space with stars in the background and has an unexplored wave consuming said stars, or "The World of Drawcia" level, what if it's said that she achieved her goal and got all of reality turned into a painting? That would justify the name. All the descriptions to her feat would make fitting that she turned the universe into a painting, it wouldn't be odd if this was confirmed solidly somewhere.
== Post-Triple Deluxe age==
Some points need to be connected to reach the conclusion that around 1000 years or over 1000 years happened between Kirby & the Amazing Mirror and Kirby: Triple Deluxe.
In Amazing Mirror we know that the Mirror World was a peaceful place until someone turned it into an evil world by currupting the Dimensional Mirror. At the end of the game everything gets back to normal but someone else evil gets destroyed and sealed inside the Dimensional Mirror.
Some time after that, Taranza stole the Dimensional Mirror from the Mirror World, and gave it to Queen Sectonia. Sectonia gazing into the mirror day after day led to her mind being twisted towards tyranny by its power, becoming evil.
Then there are a lot of events that can be exactly pinpointed to be either after Sectonia became evil or at least after Amazing Mirror:
*At the start of the story mode in Triple Deluxe there is a montage of Kirby spending time in Dream Land across a minimum of a day, fitting to the upcoming timeframes that will later be stated to have passed and for Dream Land being as peaceful as portrayed to be (despite how regular it seems to be in danger). This would start either after Amazing Mirror or Kirby's last adventure, Sectonia may or may not have been evil by the beginning of the montage.
*Queen Sectonia's Jap. pause screen states that she tormented the People of the Sky for many, many years. Which had to happen after she became evil.
*The ending of Triple Deluxe again points out Sectonia having tormented the People of the Sky "for a long time". Starting after she became evil.
*Dark Meta Knight's Jap. pause screen states that he was sealed in the Dimnsional Mirror for "endless years", which is poetic but still points out many years having happened. After Amazing Mirror.
*Sectonia being basically a parasite possessed a lot of hosts before, to the point where she can't even remember her true form (Granted, she's a bit insane). Starting after she became evil.
*It was stated that "Once upon a time" she looked similar to her insectoid underlings, but her current bee form is a body that she took over through magic. It was also pointed out how changing her appearance like nothing and not care to discard her true form were a cool things Sectonia had going for as a villain (See the Jap. version). After she became evil.
*Sectonia Clone's Jap. pause screen states that the data taken from the plant where Sectonia died made the clone and that "The data includes that of various organisms, spanning a period of over 1000 years", meaning that from getting info to clone Sectonia's last body they also got data of various old bodies she had across over 1000 years, which in turn is fitting as killing this clone will make it turn into Sectonia's true form for a second before blowing up. This events being after she became evil, if granted those more than 1000 years could have an unknown fraction of time being passed in Sectonia's true/original form, as in, for example maybe she was 40 years in her true form, then she became evil, and then she was 9980 years in other forms, thus "spanning a period of over 1000 years" w/o making the other characters who lived before Amazing Mirror to Triple Deluxe objectively over 1000 years old. Then again, maybe "over 1000 years" is a number like 1300 years or so having passed and Sectonia in her true form was as young as she or any other character appear to be at glance, this much is unclear.
Since most of this comes from Triple Deluxe, it should be noted that for that game it was stated that it starts "with a simple story that doesn't over-assert itself for those who just want to enjoy a pure Action game", and that "That is why the deeper parts of the story, as well as the hidden enigmas, are discussed briefly only in the "Special Pages" that can be seen when opening the pause screen during boss battles. This can be viewed as one such enigma.
Side note: We currently give Corruption to Dark Meta Knight for what he most likely did to the Dimensional Mirror, but granted this happened off-screen and maybe he was dead (somehow) while he did so, first reviving when fighting Dedede, or maybe the mirror could corrupt Sectonia via some leftover effect of what Dark Mind did to it. It doesn't really matter how the mirror was corrupted and what take you buy into for that, only that the mirror was corrupted and in Sectonia's possession after Amazing Mirror.
==Distance between Popstar and the Divine Terminus==
There are many indications that most of the main story in Star Allies happened within either Kirby's galaxy or the wider universe, and respectively that the Divine Terminus near the end of the story is either at the edge of that 1 galaxy or the edge of the universe.
There is a lot of inconsistent information about it which I'll list here. In short, the take that it happened in Kirby's galaxy is a little more consistent and what we should go by, even beyond the fact that the lesser take would inhereditary need less to be used.
Neutral points:
*A twitter post refers to what happened in the Divine Terminus at the start of the story to be "from the other side" (twice), but it's not clear what area are they at the other side than, it could be the galaxy, or it could be the universe, which they also say it's in danger. So one could interpret that they're at the other side of the universe, but then if it's notably consistent that they're in the same galaxy then that's likely what they meant.
*Hyness mentions he and his people are at the far ends of the galaxy 3 times here, here & here (They being " was a mistranslation). He could be referring to the ends of the galaxy where he is right now, not necessarily the galaxy where Planet Popstar is.
*, which means little as the guy could be from some other dimension from all we know, and being "reminiscent" to something amounts to nothing.
*Marx's better translated Guest Star description (See here or here) has him "aiming for the galaxy", subtly as in trying to take it over. The translator wrote that "It could just mean that he's trying to "go to [the galaxy]", but he's already in the galaxy, obviously.", but I say the takes are either of this: A. Marx, the "Cosmic Jester", might have been outside Kirby's galaxy when he sensed the danger, thus he aims to go into the galaxy. B. Marx might have been outside Kirby's galaxy when he sensed the danger, thus he aims to go into the galaxy and to take over the galaxy, allowing the text to work on 2 levels. C. He's in Popstar/Kirby's galaxy, senses danger, and aims to go into the galaxy where the Divine Terminus is (in another galaxy). D. He's in Popstar/Kirby's galaxy, senses danger in that same galaxy, and aims to take over the galaxy (So the Divine Terminus can be in the same galaxy as Kirby).
*Depending on interpretation, Dark Meta Knight's better translated Guest Star description either states that the Divine Terminus is beyond or on the other side of the galaxy. 
**Depending on interpretation, Daroach's description in the Jap. site of Star Allies either states that the Divine Terminus is beyond or on the other side of the galaxy (He thinks the Jamba Heart pieces are that treasure).
*In a special twitter post Francisca says "In this vast galaxy" to refer to something in the Divine Terminus, which could refer to the setting of the story, if again they could be in their own galaxy.
*The "Far-Flung - Starlight Heroes" level game map has Planet Popstar at the start and the Divine Terminus at the end; Creating that area was portrayed as first the the universe having been created/designed, and a swirling galaxy wrapping the surroundings to convey the direction of progress (KIRBY STAR ALLIES THE ORIGINAL ART BOOK, page 131). However, the same book states a prior game map to had become a diagram of the stage background, expressed with a toy-like size and it being deformed (page 87), for what is worth.
*The kanjis for "universe" used below & above, 宇宙, could have simply gone as in "space" an unknown amount of cases. Likewise, Jap. has no plurals & singulars like English has, so when a "galaxy" is pointed out, it can also be "galaxies" in an unknown amount of cases. Of course, the lesser assumptions require less speculation.
Evidence or potential implications that the story happened in the universe or at least outside 1 galaxy: 
* An alternative dimension version of the Divine Terminus was referred to as "the end of another world". As she used 異界(いかい), she was referring to the 1 dimension where she is.
*The place is stated again to be "the end of another world", to the point where it leads to leads to various other dimensions in Another Dimension.
*Lesser point, if not pointless: Suspiciously, Galacta Knight, which the game reminds us is the strongest warrior in the galaxy, seems to be weaker than Void Termina, who gave Kirby his toughest battle yet and previously needed 4 unknown heroes to fight him and be sealed, one of which is suggested to be to be Galacta Knight. It could be fitting if Galacta Knight's title only applied in Kirby's galaxy, but Void Termina was outside of it. Or maybe the title doesn't apply to someone like Void Termina, who was just born.
*Lesser point, if not pointless: The Divine Terminus should have been there for extremely long periods of time, yet it would only be located at the end of Kirby's galaxy, where Nova's summoning point is and where there isn't supposed to be anything. Granted, it could also be there both places are at different ends of the galaxy. The implication of the Divine Terminus and Popstar's locations being at the opposite end of each other in the gamemap may imply that they really are at different ends of the galaxy side by side, but the same can't be said about Nova's summoning point.
*While the American version of this loading screen description states the view in the last world of the game to allow you to see all the sights of the galaxy (implying that's the space between Popstar and the Divine Terminus, which are at both edges of the map), the og Jap. version instead refers to that world as "the vast universe".
*The Friends Hearts are stated to be "scattered throughout the universe" (KIRBY STAR ALLIES THE ORIGINAL ART BOOK, page 24). The Friends Hearts were scattered along the Jamba Heart pieces at the start of the story.
*The Jamba Heart pieces are stated to be scattered "throughout the universe" (KIRBY STAR ALLIES THE ORIGINAL ART BOOK, page 112).
*The easter eggs seen in the corners of the "Far-Flung - Starlight Heroes" level game map are said to be "in the corners of the universe" (KIRBY STAR ALLIES THE ORIGINAL ART BOOK, page 122).
*Stated that the Jamba Heart "was scattered throughout the universe" (KIRBY STAR ALLIES THE ORIGINAL ART BOOK, page 134).
Evidence or potential implications that the story happened only in the galaxy: 
*The Jap. site of the game states the ritual at the start of the story to take place "in the far reaches of space", and that this threatens "the entire galaxy", presumably because of the corruption of the Jamba Heart pieces give on the planets & moons they reach. (Granted, it could be that it was talking about the threat of Void Termina destroying everything later on, but that's much more unlikely.)
*Francisca's second pause description in the story mode states that the Jamba Heart pieces "rained down across the galaxy" (or "throughout the galaxy" in the Jap. version).
*Hyness' first pause description in the story mode states that the power of darkness he needed scattered throughout the galaxy.
*The Star Allies Sparkler/Twinkle Star Allies' pause description states that Kirby or Kirby & co. thinking "I want to save everyone in this galaxy" turned into that vehicle, which is odd as Void Termina was likely going to destroy the universe, not just that one galaxy (That much is also inconsistent, but more in favor of the universe being eventually destroyed).
*One of Void Termina's pause descriptions states that he has "wandered about the galaxy constantly", which seems to refer to when he was just Jamba Heart pieces. Granted, it somehow seems to refer to a time before the main story, despite being sealed.
**Void Soul's pause description references this period where he's dead as him "wandering the galaxy".
*Daroach's Guest Star description has him thinking that the Jamba Heart pieces are gemstones, and it's stated that they're in the galaxy.
*“An evil heart flies in from across the galaxy, and a good heart flies out to Kirby” was quoted by Kumazaki (Director of the series) in an interview (Nintendo Dream issue of May, 2018).
*.
*Kirby Star Allies' Jap. site states Susie to be travelling to the far reaches of the galaxy, presumably to reach the Divine Terminus near the end of the main story.
*A twitter post with (a non-canon, in-character) Flamberge has her calling the game map "the vast galaxy", with its cameos being in its corners,Kirby JP twitter post of Apr 9, 2019 when those cameos appear in the corners of that game map.
== Dimensional Walls==
The name "Dimensional Walls" (ディメンションウォール) for this space things come from the Jap. guides Kirby's Return to Dream Land & its remaster, like the "Kirby of the Stars Wii The Complete Guide" (「星のカービィ Wii ザ・コンプリートガイド」) and "Kirby's Dream Land Wii Deluxe Official Guide" (「星のカービィ Wii デラックス オフィシャルガイド」). We only have those few pages to source this, any other info that might come from the Jap. guides is pretty unknown. For example, we don't know if those guides gave any more info about the Dimensional Walls or the mechanics of what Kirby & co. could do to them.
The Dimensional Walls can be pushed in the following ways: 
*Kirby's Star Spit, especially when powered. And notably, if Kirby inhales and spits a King Dedede, Meta Knight, Bandana Dee or other Kirby then they will hit the Dimensional Wall themselves when in contact with it, although I only have footage of Dedede doing that.
*Everyone's Team Attack, meaning Kirby blowing air really hard, Dedede, Bandana Dee and Meta Knight shooting energy, and Dedede hitting the wall hard if hit too close.
As such, those characters should have Spatial Manipulation with their regular attack, if needless to say it would only be used when they feel like it and hit a structure made of space.
Now, you may think that this walls are very small aside from their height (when going from left to right and from right to left), but their depth is really unknown. The stars/white dots in the Dimensional Walls would only be smaller than Kirby if they all were in the same depth, but they're not; the Dimensional Walls had in them figures of squares, circles, 5-tipped stars (like a Warp Star) and other shapes, those are in the same depth as Kirby, and behind/deeper into those shapes they're the stars in the Dimensional Walls. We could still assume this stars are still smaller than Kirby, but there's no longer a reason for it, they're like any white dot in space on any work of fiction without evidence to not be a realistic star.
Imagine this is how you see a Dimensional Wall with the perspective of the player, the blue part is the Dimensional Wall, the gray part is the rest of Another Dimension and the pink sphere is Kirby.
We can all see and know that, but how does it look from above Kirby's head? There're 3 options:
Another Dimension & Dimensional Wall, take 1.png|Option 1
Another Dimension & Dimensional Wall, take 2.png|Option 2, this one's just absurd and you can ignore it. It's either 1 or 3
Another Dimension & Dimensional Wall, take 3.png|Option 3
I imagine most people would initially think option 1 to be what was going on, but there's a difference from thinking it and affirming it as what happened. The Dimensional Walls are always forcing Kirby & co. to keep advancing, Kirby & co. can't be where the Dimensional Walls are and they die if they get crushed between a Dimensional Wall and a real wall. The Dimensional Walls are thus implied to be large enough for Kirby & co. to not just go around them when they approach (if they didn't decide to do that because "lol game logic", which seems pretty unlikely). Sure, if one could manipulate the camera of the game they would probably see option 1 as the real one (like with the ocean here), but that's also easily dismissible as game mechanics. The Dimensional Walls were expanding from left to right, from right to left, from above to down and down to above, not at perfect synchronization, but omnidirectionally no less, it can be seen as quite weird for something that big and expanding in that way to have some less-than-interstellar-in-size part of itself moving in one direction those 15 times the Dimensional Walls were going after Kirby & co. Adding in the fact that they have stars deep inside them, and then (as I see it) the walls being interstellar in their depth's size would even fit. And by that I mean the small part of the wall Kirby & co. can push, but all the Dimensional Walls as a whole, which did objectively covered over interstellar distances.
But things are unclear, maybe the depth from the outside is in fact small but from the inside of the walls there are interstellar amounts of space, and so no AP or Lifting Strength could possibly be applied to this.
==Star Allies' sensing ability?==
In short, there are somewhat vague implications of all Star Allies having a sensing ability, but due to the lack of solid evidence, only the individual characters who showed having this power have it. There is definitely an argument to be had that every Star Ally has the power and everyone has it at the same range, so this small list of all the displays of this ability should come in handy. 
*Kracko's Jap. pause screen description states that "the sensation of their energy is different than usual", as if some characters felt his usual energy before and they can feel this different energy, but this is vague.
*Guest Star is a mode where a character that isn't Kirby is the main lead character that you play at, the following descriptions come from there. All descriptions can be read from second 1 of gameplay in Planet Popstar. 
**Meta Knight's states he senses "even the darkness beyond" and goes for it (to fight it). Context below implies that "beyond" means pretty far, far away.
**Marx's states that he senses a dangerous aura from a distant star (or a scent rather than an aura, Jap. is interpretable), and there is an argument to be made that this is in another galaxy, or else somewhere in the same galaxy.
**A possible translation for Dark Meta Knight's description says that he senses the darkness at the edge of the galaxy or beyond the galaxy.
**In Magolor's description it's questioned if evil (Magolor) can sense evil (the Jamba Heart), as if needing to sense evil was a standard for all characters and it was odd if Magolor could, since he's evil (Seriously, he's evil. Some people judge Kirby characters' morality by their vague feelings over them rather than their own actions and end up getting things wrong on a certain few).
This darkness/dangerous aura/evil they sense is the Jamba Heart being formed at the Divine Terminus. See here an album that shows how "darkness" is used to refer to the Jamba Heart pieces/Jamba Heart/Void Termina in Star Allies.
For the range of this ability: The Divine Terminus is at the edge of the galaxy, Planet Popstar is at the other side in the in-game map, often stated to be at the edge of the universe outside of Star Allies, stated to be "at the other side" in the context of Star Allies, though they don't say they other side of what, and potentially said to be "at the other side" or "across" the galaxy from Popstar, depending on the interpretation as the kanjis used can also mean "distant" or "beyond". So the range is Interstellar, if not Galactic.
== Powers of Friendship==
WIP
Note: This is yet to be accepted, so it can't be used on profiles or serious threads.
Abilities every Star Ally should share and that they bestow with a Friend Heart (unless that's put into doubt). See here Friend Abilities being used and here most statements about them and all Friend Actions, I'll be referring to the things they do in those links. 
*Energy Manipulation: 
**When creating a Friend Star they join energies from their bodies that turns into the vehicle. Then when using it, the pilot's ability to shoot tiny stars is more so its own power than something given by the Friend Star.
**When the Star Allies raise their weapons or hands aiming to use a Friend Ability and when they use a Friend Action we can see a pink heart-shaped line of energy around them, this isn't just decorative.
**More notably, the sparking "things" coming from the Star Allies (all those colors, auras and stars) are also legit energies they manifest; On their non-canon fight with Void defeating him makes him explote with all those same energies.
**Doing things like being shot from cannons in a group of 4 can trigger lesser auras they don't have as only 3 being shot the same cannons; As 3 they can't break through some rock while as 4 they shatter it without losing speed and while they then keep shattering some other rocks on contact. This lack of power to break some rock comes from the cannons while the further power to do so comes from the Star Allies, and doing this isn't a Friend Action.
**While never outright stated, the energies they manupulate is specifically positive energy: Void , and maybe more of the like, therefore a dramatic but peaceful death with those energies and Void smiling should indicate he was filled with positive energy. 
***Whether or not the Star Allies can do this with anyone by just throwing and landing their overall attacks at them is unclear, on one hand Void gathers that kind of energy himself, and since others don't then this could have been a special case, on the other hand Void only does that when reincarnating, he had no reason to keep taking it on battle while already alive, and only 1 battle with positive energy being thrown at him to give him some happy ending seems like a bit of a short time next compared to all the much longer time Hyness was filling him with negative energy through the story mode of Star Allies.
***What conforms positive energy is also never outright stated but we can speculate reasonable things based on context.
***While what happened to Void should have been done via team work, 1 Star Ally alone can technically do the same, , so it could be that 1 Star Ally alone can use this energy, if to a lesser extent.
***On what Hyness did, all that negative energy he used wasn't shown visually, making it more so if not outright literal hatred, obsession, jealousy and greed. When beating Void we also don't see any energy until Void manifests it. So just feeling this things should generate positive or negative energies, and when those energies show up visually they should be considered both DBZ-like energy that can be used to harm others and as well as feelings.
*Empowerment: Given all of the above, positive energy/all the feelings that conform it give further power to their users.
*Energy Projection: Via Team Attack, it has the energies mentioned before, however, some characters' very specific use of this attack is through means in which they could already use other powers (Marx "vomits" the Team Attack like he does when using Marx Cannon, an attack where he shoots energy in the same manner, Magolor makes a spell or something, the Mage-Sisters pray, which gives powers in their cult). So everyone's ability to shoot energy might have already been their own, but this use of positive energy on it is likely something they got because of their new powers.
*Accelerated Development: See here. This type of powers are not limited to Star Allies, Hyness could already use something like it, and less knowledgeable persons are presumably able to do the same, unless Twin Woods had deep knowledge on the ways of friendship and that therefore characters without it can't do the same despite using similar uses of positive energy/the feelings that conform it. Of course, it's more likely a Star Ally can do what Twin Woods did than Twin Woods being able to do everything a Star Ally can do listed here if they feel like it, a Star Ally can get all of its powers at once if it was a foe turned friend by a Friend Heart, and then they go on to have more experience, so while Twin Woods could be able to use some of this powers, they could also be exclusively bestowed by a Friend Heart or due to a higher use of positive energy, meanwhile Twin Woods has nothing going for them and so it's very unlikely for any Star Ally to need any specific knowledge they don't already have or a higher use of positive energy to do what Twin Woods did.
*Minor Telekinesis: 
**When using Friend Bridge the characters aren't necessarily touching each other (they would all need to be the largest characters, the most common ones are smaller), those energies previously described likely help to hold them up for what they do.
** When using a Friend Star there are 2 positions in which the thing can be rided, on top of the Friend Star or with it behind the user, who is either grabbing it seemingly uncomfortably with their "hands" or something else (TK) is grabbing the user.
**When Marx calls for Friend Abilities he lifts one of his jester balls without using his arms (which he has), which could be potentially related to all Star Allies having TK, if it isn't just Marx using a power only he has or related to some Kirby characters' ability to move body parts not connected to their bodies.
*Non-Physical Interaction: (None that this doesn't necessarily get bestowed with a Friend Heart, the characters may be already be able to do this.) The Star Allies can hold into the "tail" of the Friend Star, which is made of at least somewhat transparent energy and can pass through things (granted, the characters holding onto it also pass through things, which I'm pretty sure shouldn't count). They can also affect Void Termina's Final Core form, whose descriptions imply it to be a soul (if that isn't poetic) and the thing being able to pass through the floor (which granted, can be dismissed as irrelevant).
*Creation:
** When in groups of 4 they can create a Friend Star.
**When in groups of 4 and using the Friend Train the leading characters gets a hat created for them.
**I'm not listing the things Friend Hearts have going for, but, I should point out their ability to create cloths on others. We see that in-gameplay and in the cinematic that is basically the oppening of Star Allies, other pics of the story and cinematics in the story mode show those characters having those cloths given to them too. There might be a relation between the Friend Hearts being able to do this and other stuff the Star Allies can do.
*Power Bestowal or limited Absorption, or both: Any Star Ally with elemental powers can bestow it to an ally who absorbs the element given for themselves. So does the former has Power Bestowal or the latter Absorption? It can also be a little bit of both. Even if it was only Absorption, they could only get it from allies with similar powers, if it was only Power Bestowal, the same limitation has no reason to apply. Here are all the statements.
*At least limited Transmutation, maybe Transformation & Matter Manipulation too: Similar dilemma than before. 
**When giving an element to an ally raising a weapon like a sword the weapon will transform. This is obviously only stylistic but not a thing that doesn't happen nor powers this characters aren't using.
**When using some Friend Abilities some characters briefly transform into a thing that's being used for some purpose, but this can be comletely part of the powers they already had.
**At one point in the story mode of Star Allies the Star Allies use a Friend Star to escape Jambastion and go into space, and their vehicle somehow turned into a regular Warp Star, which if it isn't a plot hole or something then it was the characters' own abilities.
**I'm not listing the things Friend Hearts have going for, but, I should point out their ability to modify a bit clothes on others, like when Kirby using 1 to purify the Mage-Sisters and their clothes turned back to normal, same with Hyness. There might be a relation between the Friend Hearts being able to do this and other stuff the Star Allies can do.
** Unlike creating and modifying cloths, this one can absolutely be game mechanics: The Friend Hearts' ability to change the color of the foe turned friend.
*4th Wall Awareness: (Again, they could have already have this.) When using a Friend Star and using a door, the last Star Ally greets the audience while the game loads to the next area.
Also note that some of this aren't as useless as they may seem at glance, allies with similar powers can be obtained by turning enemies into friends, turning foes the enemy may summon into friends or finding random beings around in a moved battle, robots or energy beings too. See the profiles' Notable Attacks/Techniques to see what their Friend Hearts explained.
==Accelerated Development==
In Kirby Fighters 2:
As the ability will be related to the characters' bonds are friends, I'll list text going over those bonds even if it alone doesn't imply any Accelerated Development. 
*Twin Woods: In their first fight they have little reason to scale to Kirby & co., if they're the boss coming after many regular fights of Kirbys which should be comparable or equal to Kirby, simply because they're Kirbys themselves. Twin Woods in their second fight are "with a further deepened bond", and they learned the Jump Press/Stomp Jump, the latter not necessarily being something notable as anyone can learn a move in between fights. In their 3° fight it's pointed out in a loading screen description called Currently Growing that "Both their movements and techniques are currently growing!", which is odd, as in "Is this happening right now as they wait for Kirby & co.? Shouldn't they be training for that to happen?" Once again, so far it still isn't necessarily a superpower. In their 4°, final battle their loading screen description called "Tree Twins' Max Power" says that "As their growth accumulated, Twin Woods gained great strength!", meaning a few things: This is a superpower now. It recontextualizes the text before, that last "growth" may or may not have been in a superhuman way, but it is related, and it led to this last growth of great strength. In this last battle, Twin Woons may even scale to Kirby & co., given that their power as a foe is held as great strength as there is an in-universe reason for them to be this strong. In terms of the mechanics around this Accelerated Development power, while Kirby & co. were fighting others & that helped them become more powerful, Twin Woods themselves has no reason to been fighting anyone and they seem to be stated to be growing in the sense of gaining power & skill/techniques while standing around. One could assume they trained among themselves offscreen, but we never saw that and it's unknown if that's even possible given how consecutive the story is. What made them stronger seems to just be the grow of their bond of friendship, but that can be better concluded with the context below.
*Kirby & "his buddy" (Bandana Dee, Gooey or Magolor), and King Dedede & Meta Knight: After Kirby & his buddy defeated King Dedede & Meta Knight, it was stated that the latter two "deepened their bond even further through the battle, and lay in wait storing power" in the following place where Kirby & co. went to fight them. Then in their next fight it's pointed out how they were "different/seriously different" from before and it's recognized that it's the same for Kirby & his buddy who climbed the tower and powered up; Kirby & his buddy were just defeating people over and over again in the tower whereas Dedede and Meta Knight were the host of that challenge waiting on top, they weren't beating people, so just fighting & losing the last time, and having a deeper bond made them stronger. Granted, Kirby & co. having "powered up" may or may not refer to the items they were getting, if in part. On a later battle, Dedede and Meta Knight got amped by masks, but by the time Kirby & his buddy reached them, they could defeat them and blast away those masks by loading a weapon with the power of Kirby and his friend's bond (which acknowledges it as a real form of power they can shoot). Then it was pointed out how the power of King Dedede & Meta Knight was "genuite power, due to their deepened bond", and that even without those masks it would have still been a nice fight, justifying their power on that deepened bond.
*Shadow Kirby: He's fought a few times in the story. At first he's stated to be as powerful as Kirby (The Jap. vesion says that "his power is undoubtedly Kirby’s own!"). On his 3°, last battle his loading screen description called "Max Power Shadow Kirby" remarks how Kirby can surely overcome his awesome/extraordinary strength if he has a companion buddy, implying that maybe Kirby wouldn't be able to do so on his own. Shadow Kirby's pause description reiterates he's "the strongest Shadow Kirby" and that he has "an overwhelming power". Notably, not only is he not having the same people-beating "training" as Kirby & co., but he's also alone, with no bond of friendship to make him stronger. Sorta; the latter text says that the source of said power may be proof that he has been quietly protecting the Mirror World, but when he lost on his 2° fight he didn't go to protect that place and then came back more powerful in his 3° fight, no, it was because he has been protecting his homeworld in the past that he could become that much more powerful in a short time, which can easily be interpreted as in "he has a home & people to protect and he has been putting care into it, therefore he has this ability".
*Others: Kirby & his buddy are said to have been driving away powerful figures awaiting on each floor with "the power of Buddies", which should be less poetic than how it would sound alone, given that they can literally shoot the power of their bond. In the final Kirby & his buddy vs Dedede & Meta Knight fight it was said that "bonds clash with bonds" and "the flames of bonds" burn in their eyes. Same as before. If both can work in 2 ways, being poetic and not being poetic.
Conclusions: 
*The bond between 2 friends causes real esoteric effects beyond what the the bond between 2 friends is in real life, watch the evidence as long as necessary to accept this if you need to.
*Having a bond of friendship with a partner and grow that bond can make them both more powerful. Doing activities like fighting can help grow their bond, be it beating up a number of foes, losing 1 battle, or whatever were Twin Woods and Shadow Kirby doing off-screen;
**Twin Woods came "with a further deepened bond" in their second fight, it can be that they always had a deepened bond in each fight and we simply weren't told each time.
**Shadow Kirby could do this without a partner, but had vaguely similar "power of friendship"/"positive reasons" on him, protecting his home reality. Speculation wise, maybe he's simply as strong as Kirby at all times by nature.
*Twin Woods was also able to learn a new move in a short time & had their "techniques" growing, and Dedede & Meta Knight might have done the same (They show new moves, but maybe they simply didn't use them before), so it could be that learning new moves/growing in skills can also come off superhumanly fast, or in the sense of happening w/o one trying (As in, if you were trying, it would happen faster, but while you're not trying, it somehow happens on its own slowly).
*This Accelerated Development at least applies to the characters shown there: Seeing Fighters 2 alone one may as well believe that, so far in this conclusions. Further evidence below will show why this is most likely not the case.
*How much powerful they are becoming is up in the air, but if it were something "small" like 5% to 20% every time someone's pointed out to have become stronger, none of the texts would be lying. Thus we can only assume some very minimum grows in power here, if still notable ones and superhuman at the speed in which they happen.
** If we disbelieve Twin Woods to have been on the same level as Kirby on their first fight, therefore being with the level of a low-tier, then by becoming at a Kirby level on their last fight they grew hundreds upon hundreds of times more powerful. But even if this was the case, it wouldn't mean top-tiers can grow proportionally as much, just that far weaker characters have an easier time keeping up to have the top-tiers' level through this mechanic.
----
In other games:
The Kirby series has always dealt with concepts like friendship, positive emotions & the like, as well as having notable grows in stats from time to time, however one would have had a hard time arguing they're related before Fighters 2. As you can guess, there are many games were you would have 0 arguments to work with. Fighters 2 is the first & only game that states & shows that those things are related & how so, as clear as it's shown above. From that information, one can conclude that A. "Fighters 2 recontextualizes the games that came before and after it." Or B. "The mechanics Fighters 2 portray exist in a vacuum and other games have none of that." Because of this, all the context of how this mechanics would fit into other games needs to be analyzed.
Right off the bat, if it needs to be said, the games where this mechanic isn't used "don't matter". As in, "A mechanic like this being alluded to in a verse doesn't have as evidence against it instances where it's not alluded. That simply means that it wasn't alluded to or used in those cases specifically". Kirby can have a game where he competes in races with vehicles all day and that wouldn't mean the mechanic exists more or less across the whole series. It might sound unfair at glance, but this can't gain negative points in consistency like that, only positive points. This mechanic is something that needs to be analyzed by looking at the cases where it is, or could be, alluded, and agreeing or disagreeing with that being related with other cases where it's, or could be, alluded. Being open-minded about it.
----In Kirby Star Allies: 
*Related to bonds of friendship & positive attitudes: Here's a compilation of all the times concepts like friendship and companionship are brought up in this game. What you can find there is: 
**A strong emphasis on using Friends Hearts across the game; Turning enemies into allies/friends, having them do the adventure with you as friends. Outside Friend Hearts, everything is still portrayed as a plural amount of friends doing things when they could just do things alone in gameplay.
** The "power of friendship"/"the power of Friends"/"Friends Powers"/"Friend Power" being a real thing between them that allows them to mix powers and to do techniques & superpowers together. This techniques are stronger and combine the power of the users, but then again, 2 people punching someone at once is stronger than 1 person doing so; What happens here seems to imply they are in fact stronger than the sum of their parts, as 1 to 3 Star Allies get blasted into a "giant" rock & fail to do any damage to it, while 4 Star Allies get empowered by some aura, shatter away that rock & have enough power left to do the same with 3 more rocks the same size. 1 to 3 Star Allies are not using their own power to try to break that rocks as this is the result of a cannon firing them, nor are they using Friend Abilities here, so it's up to one to interpret if they get to have a similar effect happening (Being stronger than the sum of their own power) on a regular basis or using Friend Abilities, and if they can keep this amp permanently (Fighters 2 is the one that elaborates on that, this game doesn't).
**The white energy with many mini stars of many colors that they emanate or shoot in Friend Actions, Team Attacks, and doing things together is real, being called "a mysterious power", with its mini stars being somewhat recognized again here, and with Void dying filled with that same white energy with stars of many colors (See Void Termina's Powers & Abilities to understand why that was done).
**The heart-shaped energy they emanate before a Friend Action is real too. It's also shown by Hyness here & here and by the butterfly that turns into Morpho Knight here & here, implying they use a similar/the same type of power system. For Kirby & co. it happens right before showing that white energy with many mini stars of many colors, so that "mysterious power" is or could be the same. 
***Specifically, Hyness ends up using "a negative/dark" version of it, getting the same starting heart-shaped energy but following the "Rag Doll Circle" without the white energy with stars Kirby & co.'s "Friend Circle" has, replacing it with dark colors & stars, presumably because he's a villain with negative traits and the "contrast between a team of friends who are full of heart, and Hyness, who forsakes his own heart and falls into darkness".
***For the the butterfly, it should be noted that when another butterfly absorbed Soul Forgo it didn't use that heart-shaped energy, nor did it have it when blowing up. While nothing is stated of it, we can reasonably say that this is because Soul Forgo doesn't have this powers for the butterfly to absorb, whereas Galacta Knight had them. Galacta Knight can create dozens of Heart Spears/Spears of Heart, , which granted Kirby & co. those powers and Friend Abilities.
**Their companionship/friendship grows over time given that: Friend Actions makes them always emanate heart-shaped energy before doing them, the Friend Star makes them be "united into one", the story being a "journey of companionship", and the game being hoped "that the more you play, the more you will become attached to the Friends". (Again, this is something that matters if you buy that Fighters 2's proposal of "the deeper the bonds of friendship=the stronger you can get" is an actual mechanic)
* This game came out a few years before Fighters 2, because of the above, it could be argued that Fighters 2 purposefully expanded upon some of the ideas in it, as opposed to everything being 1 big coincidence. It's worth noting that the series has a record of giving people information to piece together by themselves that create conclusions not stated anywhere else in a clear manner, and that they don't mind how people may pass over the games oblivious to that.
*Related to stats growing in a superhuman or notable way: Using Friend Hearts, Kirby makes regular enemies & sub-bosses, who are far weaker than him, somehow keep up with his stats and beat bosses at his level. He can also use Dream Friends, allies whom all scale to Kirby himself in more clear ways, but it isn't portrayed as Kirby having only used Dream Friends, it's portrayed as if he could have used anyone and that everyone mattered, with pictures of the story progression showing random enemies along Kirby, his final attack against the final boss being creations of every friend in the adventure being thrown (Granted they're created by Kirby, at Kirby's level), and artwork showing anyone with Kirby, especially in the main story mode. Still, this could all be "videogame non-sense powerscaling". Or the regular enemies & sub-bosses grow to Kirby's level.
*Kirby & co. face off against people of "even power to Kirby + being are amped by a Jamba Heart piece", then they keep beating people like that and around that power on the story. 1 Jamba Heart piece is upscales to Kirby by the start of the game. By the end of the end Kirby & co. trade blows and defeat Void Termina; By all accounts Void Termina should have been too much, given the scaling you can find in the latter 2 profiles, but yet they still managed to get a comparable power by the time they fought. Likewise non-canon side content and the canon Heroes in Another Dimension mode supports them being that power.
Conclusions:
*None of them explicitly state "the characters you see are growing stronger via the power of friendship" like Fighters 2 pretty much did, but there are some cases where this idea would seem to fit in.
*If there is connection on the mechanics, any Star Ally would have access to this ability. It clearly isn't some obscure art those few characters in Fighters 2 knew about. If Twin Woods could do w/o having been bestowed the same friendship-based powers and attitudes the Star Allies have, then so can the Star Allies.
*While Star Allies may cover all the stat-increasing mechanics Fighters 2 uses, Fighters 2 isn't covering all the mechanics Star Allies had going on. Star Allies had wider uses for things coming from feeling & actions, it is out of all of them that at least bonds/deepening bonds of friendship makes stats and maybe techniques increase. 
** Emphasis on "at least", who knows how Shadow Kirby became stronger. It could be his heroism or simply not make any sense while being an outlier.
----
In Kirby's Return to Dream Land / Kirby's Return to Dream Land Deluxe: 
*Related to bonds of friendship & positive attitudes: All the adventure is done by Kirby, King Dedede, Meta Knight, and Bandana Dee. "One of the title proposals under development is "Kirby Wii Super Friends of the Stars", which is one of the themes of this work, "Kirby of the Stars, Wii Super Friends". It was expressed using the word "friend"." Nothing beyond that is elaborated in this regard.
**Technically, Magolor brags about friendship a lot across the game and in twitter posts of the remake, but this happens outside the adventure Kirby & co. are doing. Unless we count twitter posts pointing out the adventure itself, which is super vague, in this context.
*Related to stats growing in a superhuman or notable way:
**Magolor hypes out Landia, is unsure if Kirby can defeat it alone and tells him to team up if necessary. Kirby, Meta Knight, King Dedede and Bandana Dee fight and defeat Landia, and then they soon fight and defeat Magolor EX, who one-shotted Landia in his prior form, "Magolor (Phase 1)".
**When fighting Magolor Soul, it's stated that the battle against Magolor EX "went beyond limits".
**Magolor Soul is fought seconds after Magolor EX (I'm not saying they went beyond limits in seconds, it happened across the battle against Magolor EX). Kirby & co. fight & defeat the Magolor Soul, see Magolor's profile, "Magolor EX" is insanely weaker than "Magolor Soul".
*In the non-canon side content and the canon Magolor Epilogue mode, as well as future games, support that growth in power. See our profiles.
*To note, Kirby's Return to Dream Land Deluxe came out a few years after Fighters 2, and while the insane scaling was always there, that statement about the battle with the weaker Magolor having gone beyond limits was added in that game. One could argue that "They understood what the characters went through (Fight hard along friends -> more power), and at least stated the results of it", but it can simply be nothing, as they could have simply stated that they gained more power for the sake of stating that they gained more power. Unrelated to friendship.
----In other games (It matters far less):
*Kirby's Adventure: The first level opening shows Kirby getting disarmed by a minor enemy, to which he became stronger as the adventure went on (notably with Meta Knight giving him some subtle training), ultimately being able to defeat Meta Knight, King Dedede and Nightmare. Of course, this could just mean nothing.
*Kirby's Dream Land 3: After beating a possessed Dedede, and then a Dark Matter alien in his true form (whom other Dark Matter in that form was the final boss of Dream Land 2), Kirby & Gooey then in this game beat Zero, their leader, which blows up the Hyper Zone. The Hyper Zone is a weird dark cloud thing like 1/4 of Planet Popstar's size and it's either made of just regular clouds or many Dark Matter aliens, if so meaning that killing Zero blew them all up. The Dark Matter alien Kirby defeated in this game reformed from clouds of the Hyper Zone that were on Popstar, and Popstar had more of it Kirby expelled, those being tentacles of the more important Hyper Zone.
*Kirby 64: The Crystal Shards: 3 Dark Matter beings possessed 3 different targets which Kirby had to beat, making the Dark Matter beings come out of the victims and blow up when that's done. With this being early bosses in the game, that can mean those were young, weaker Dark Matter or that Kirby did got stronger than in the other game. At the end killing Zero-Two blows up Dark Star, a dark planet made of continent-sized Dark Matter beings (it could also be in part a real planet having been created+those Dark Matter). Those Dark Matter beings were either with Zero-Two when it went to make Dark Star or were created by Zero-Two while it made Dark Star, it's unclear.
From here on see the scaling chain for more elaborated context, this will more so point out the big jumps in power within it. 
*Kirby Super Star Ultra: 
**In the Meta Knightmare Ultra Meta Knight's journey to become stronger culminates in a canon final adventure and him defeating Galacta Knight.
** In the non-canon The True Arena a bunch of fights one after another makes Kirby face and defeat Galacta Knight and then Marx Soul, the latter having absorbed Nova's powers, whose this much implied to be above Kirby (See "Kirby Super Star/Super Star Ultra")
*Kirby: Triple Deluxe: 
** After Return to Dream Land and Kirby and Dedede being comparable, here Taranza starts the game by one-shotting Dedede, and later Queen Sectonia one-shots Taranza, yet Kirby's adventure made him defeat Sectonia by the time they fought.
** In the non-canon Dededetour Dedede making a shorter version of that adventure makes him defeat Sectonia DX, who is stronger than regular Sectonia.
**In the non-canon The True Arena a bunch of fights one after another makes Kirby face and defeat Soul of Sectonia, who ate 4 Miracle Fruit, when using 1 made Kirby progressively overpower Flowered Sectonia, a form more powerful than her base.
*Kirby: Planet Robobot 
**In the non-canon Meta Knightmare Returns Meta Knight goes through the same adventure as Kirby and he ends up fighting and defeating Galacta Knight, who even one-shotted Star Dream's first form when it took Kirby quite some time to do so.
**In the non-canon The True Arena Galacta Knight shows near the end too for Kirby to beat.
*Kirby Battle Royale: Kirby fights a bunch of Kirby clones so many times that by the end he could easily beat them, Meta Knight also saw them as pathetic but their poor combat record aside the rest of the context stated them to be as good as Kirby at first.
Notes: 
*Galacta Knight's scaling is mostly an outlier, as the note on his profile says.
==Sky=~=Universe==
Premise: Sometimes, not always, saying "Sky" or "Skies" in the series is a way of saying "Universe" or "Universes". You can recognize this cases as per common sense if it otherwise makes little sense to say & actually refer to "Sky" or "Skies" in texts.
The Kirby series often uses Sky/Skies as synonymous with universe/s, as you can see around here. This has not been carried out in localizations since it makes no sense; according to Sacred Faerie, Japanese songs apparently commonly do this with the word sky, which I didn't know. Fortunately, the image on the right shows at least 1 instance that explicitly normalizes to pronounce universe with sky via Furigana, the kanjis below (宇宙) meaning Universe (or Space, or Cosmos) and the kanjis above (そら) meaning Sky.
Since 宇宙 doesn't always mean "Universe", but "Space" and "Cosmos" too, this isn't definitive proof that any reality called sky is an universe-sized reality, but it helps abundantly.
That's it. As a general advice in Vs Debates, if you see a similar "X word/s is used as a term for something else" claim then be careful, that has a high chance of being wank if you have reasons to doubt whomever is claiming this, their evidence may be unsurprisingly insufficient and/or nonsensical.
== Implication of the conceptual diagram==
In case one may look at the diagram/map and then simply look away without thinking much about it.
The center has ellipsoids (semi-flattened circles). At least 2 of them are each called "Another Dimension". As a map of everything in the game, the things shown there are from the game. The "inter-dimensional rift areas" of the game happen in Another Dimension, the level design of what the ellipsoids show look like that of the inter-dimensional rift areas, and they're called Another Dimension, meaning that those 2 ellipsoids show 2 different inter-dimensional rift areas.
Now, another ellipsoid with a level design is shown too.
It doesn't say it's part of Another Dimension, but it stands to reason that it's another inter-dimensional rift area too. Because it fits & can't be anything else. This is a conceptual diagram, and a rather simple one at that, it doesn't need to say everything if an idea comes across with no reasonable way to deny it.
Now, many other ellipsoids are shown too.
They do not show a level design inside. And this doesn't matter, some of them can be inter-dimensional rift areas too as they being ellipsoids presumably means that they represent the same as the other more detailed designs. Note that I said "can", and not "they are", as in, there is objectivity on how some of them have to be inter-dimensional rift areas (15 in total), but we don't know which one those are, and the rest can be random universes in Another Dimension not visited in that story. Logically, the empty ellipsoids weren't detailed due to this being unnecessary, due to their presence conveying the same info as the ones detailed, and because they got smaller too.
At the end of each inter-dimensional rift area, a Sphere Doomer is fought and only that 1 place remains from that dimension, because the dimension is closing in. This inter-dimensional rift areas are separated from each other in the diagram as their own ellipsoids, with a plural amount of tunnel-like things designed like a spider web leading into each of them. What this means is a simple reinforcement to the fact that each inter-dimensional rift area happens in its own dimension.
The tunnel-like things exist all over Another Dimension, if that isn't to say that all of them that exist in Kirby necessarily serve the same function. There is a plural amount of them in the diagram, and they connect Kirby's Planet Popstar to the main Halcandra too: This is very notable, as Another Dimension/Another Dimension's Road is connected to Planet Popstar. So, the spider web-looking tunnel-like things leading into a plural amount of inter-dimensional rift areas should mean that some of them lead into alternative versions of Planet Popstar from each a different dimension. "Some of them" meaning the inter-dimensional rift areas that are entered from Kirby's Planet Popstar. 
*(Note: The connection Another Dimension's Road has with Kirby's Popstar is not in a way that leaves an opened portal to cross both Popstar and Another Dimension, it's "connected" in a more esoteric sort of way. Say, "It's easier to make portals between both spaces because they're connected. And if they weren't, it would be harder/impossible to make a portal between both spaces", I imagine. The "connection" has also been portrayed as an entrance that was opened by being torn asunder by a strong superpower)
*(Note 2: It isn't explicitly stated that Halcandra has the same kind of connection, it's intuitive by context but I don't need to say it. This would mean that the tunnel-like things "near Halcandra" led to alternative versions of Halcandra because of that connection. Also, the connection is a little wider than the planets themselves, covering the closeby space around them too, as the diagram was the first to show this for Popstar & Halcandra, and then Magolor showed this for Halcandra when he takes Kirby & co. there in the story.)
You could argue, "Since it's a conceptual diagram, I disagree with how it supports each inter-dimensional rift area to be its own dimension. On the basis that it doesn't need to be 100% exact, and because it was created when developing the game, it can be outdated." We don't agree with that opinion, on the basis that the first part it's pretty weak, the support the diagram is info already given by the games, and if there were to be updates on the worldbuilding, the diagram would have been updated too. It was shown confidently, without being portrayed as an aspect outdated of the game, and presumably with the texts in it being translated from the native language of the devs, leaving the rest as it is. However, here is a list of things the diagram may be wrong about that we thus don't objectively use (because it's not further supported by the games): 
*Sizes can be naturally wonky, needless to say. Not really a "mistake".
*We aren't told that "Another Dimension Bottom" is a different reality from the dimensions the inter-dimensional rift areas take place in, so that's not necessarily the case. Both takes are valid and the diagram points at 1 of them.
*We aren't told that the fight against Galacta Knight takes place in dimension inside Another Dimension rather than the "world"/dimension where the main Halcandra is, so that's not necessarily the case. Both takes are valid and the diagram points at 1 of them.
Something the diagram got right in a very impressive way: 
*We were never told that Another Dimension's Road is a bunch of tunnel-like things that expand from a center, with many of them leading into a bunch of dimensions inside Another Dimension and others into realities outside of Another Dimension. The diagram shows it. And that explains why Another Dimension was called the interspace between Kirby's Popstar and the main Halcandra regardless of being the space/gap between dimensions in general, because the way to look at the multiverse has it so one isn't saying that Another Dimension "is only the space between Popstar and Halcandra". Meaning, there was an inconsistent-looking statement in the lore and the diagram greatly improves upon it by being recognized.
== What does "parallel" refer to?==
WIP
The word "parallel" is thrown around a lot in Kirby, notably by the director of the series. It's not clear if it always refers to the same 1 concept (Parallel universes, called just "parallel" or "parallels" for the sake of worldbuilding), so I will go over all instances (that I'm aware of) and analyze them for their own merits.
*Mirror's Jap. description · Kirby Super Star Ultra: Kirby vaguely refers to his reflection as parallel, whatever this means.
*2016-8-25, Miiverse's Kirby: Planet Robobot Ask-a-thon 2, (The English version lacks this): Custom made interview. Kumazaki refers to 2 non-canon modes as "if" scenarios, calling at least 1 of them a "parallel" to the main story. That mode being similar to the story with with the lead character and events changing, so it would seem that "parallel" simply meant "they're similar" / "they're the same minus the parts where they're not". He also comments how it's difficult to arrange things in chronological order due to Another Dimension, in short, being weird, yet he wouldn't need to arrange things in chronological order if the events he's talking about never happened, which is implied by how he said they're not connected, one would assume.
* Mar 16, 2021, KIRBY STAR ALLIES THE ORIGINAL ART BOOK, pages 198 & 199: Custom made interview. Kumazaki claims the chronology in Kirby to be "parallel worlds", he said this following up talking about Morpho Knight in Star Allies, and Galacta Knight in at least Return to Dream Land & Star Allies, all of those appearances being non-canon side modes that go against what happened in the main stories of those games. Therefore, he (at least) refers to those types of non-canon side modes being this "parallel worlds". Translating the start of his response as "basically" gives a more casual tone, whereas translating it as "fundamentally" is more serious. Either way, there are 3 ways to take this statement:
** 1º: The most conservative take; Kumazaki just "feels that way", as in, it's easier to conceptualize the events of those modes as happening in parallel worlds, the point being that they're that much similar to the events in canon for care to be put into them, not that they actually happen in parallel worlds within the multiverse.
** 2º: At face value, the multiverse of Kirby has all side content as parallel worlds, and what happens there isn't non-canon.
** 3°: Taking what he says on an even more literal manner, every game and mode within those games happen within parallel worlds that are different to each other. This is an insane take, but there is some evidence to support it;
*Nintendo Magazine 2022 Summer: 
**Pages 1 & 2: Giving a summary of the Kirby things the magazine will give info of, it first claims that it will introduce "various Kirbys who appeared in the series history so far" among other things, then in the following pages the magazine keeps its promises in order, having shown those "various Kirbys" in an unclear way. Maybe those multiple images of Kirby with many transformations refer to them, since it says "In honor of the 30th anniversary, 30 types of Kirby got together! Do you have your favorite Kirby?", however, it might also to refer to what it goes over in the next pages;
**Pages 3 & 4: Talking about the history of the series and showing a timeline of its games, it asks "Do you remember which Kirby you first met?", which can be poetic since most of the Kirbys in those games are the same, and it's possible, if unlikely, that it refers to the Kirbys in each of those games as their own Kirby. In short;
***The simplest take is that talking about "various Kirbys" wasn't literal, that the images of (mostly) the same Kirby refer to those "various Kirbys" by following a meaningless game in which "30 types of Kirby got together!", and that asking "Do you remember which Kirby you first met?" also wasn't literal & (mostly) refers to the same Kirby in different points in time. Technically, Kirby from the main universe and Team Kirby from the Dream Kingdom are 5 different Kirbys, meaning that the magazine keeps its promise of "introducing various Kirbys who appeared in the series history so far".
***Following the most insane take of what was said in the KIRBY STAR ALLIES THE ORIGINAL ART BOOK pages 198 & 199 (As talked about 1 main bullet point above), the magazine is talking about how the different games show various Kirbys, and this is possible because each game takes place in their own parallel worlds. Fortunately, so far the evidence for this is pretty miserable. What I don't know is if things will remain like this in the future.
*February 24, 2023 HR-D3's Jap. pause screen description · Kirby's Return to Dream Land Deluxe: A machine "wondered in from a dimension that's not the dimenson where the battle takes place (The reality where the main Halcandra is), having crossed through Another Dimension Road. It has crossed many dimensions and parallels". Most of the text is immediately understandable: It comes from another dimension, ok. It crossed Another Dimesion, ok, we know what that is. It crossed many dimension, ok. But then it also crossed over "parallels". "Parallels" isn't a thing in real life. It needs to be a "parallel something", you can't just say a "parallel" in real life and leave it at that as if it was a word that can be used alone in this manner. Thus, this is its own term that exists in Kirby, the context in which it's used here makes it so that it refers to parallel dimensions, or parallel universes. This is not to say that every use of the word "parallel" and "parallels" always refers to the same concept, necessarily. It depends on the context.
*Interview in the Nintendo Dream issue of May, 2023: Custom made interview. 
**Impossible to know what the leading question meant by both games being "treated as a parallel", could be that he meant "are they the same", "are they not the same but similar", "are they both canon", or even, "is one in one universe, and the other in a parallel universe". I imagine he was told to ask that, since it's so weird to word the question that way under the conservative guess of what he meant, but who knows.
**It's hard to know what Kumazaki meant too, but the lower takes are now far less likely. There is a double meaning there, "the joke" being "ah, the leading question meant this regular concept (if it did), but Kumazaki went above & beyond and used that same word as a concept with much more meaning". It's genuinely possible he meant that both games take place in parallel universes from each other (Another Dimension wouldn't be a "universe", I don't have a better term there), since he relates the idea of both games being parallel with "the continuity of time as a narrative" having been challenged by Another Dimension. Taking use of how "customers are free to imagine how that would change things", I find reasonable to say that Wii's Return to Dream Land happened first, then Magolor made Merry Magoland & had a Kirby & co. from the past come in across the story in Return to Dream, thus changing it to Switch's Return to Dream Land Deluxe, the "universes" from which they come from now being different, not the same since any change in a timeline turns it into a new timeline. Of course, the 100% confirmed version of things is that he meant the games are the same minus Merry Magoland, nothing else. We will see what to do with the "speculation version" of things, or if new context comes up in the future.
*To note:
**1
**2
Conclusions:
*º0º
*Side content seems to take place in parallel worlds rather than being non-canon.
*Some of this parallel worlds would be outside of Another Dimension, not inside it. As in Planet Robobot's Meta Knightmare Returns Star Dream used "Another Dimension outside of space & time", so that universe where Star Dream was is outside of Another Dimension, and was called a "parallel" as shown above.
==Dark Matter's dark clouds==
What do they do?:
* Kirby's Dream Land 3 American website: "A threatening cloud of Dark Matter is luring the inhabitants of PopStar to evil, but not if Kirby & Co. have anything to say about it!"
* Nintendo Power volume 102 page 72: "Kirby must slurp his way though [stages] to drive back the cloud of Dark Matter that's turning the inhabitants of Popstar toward evil."
* Kirby 20th Anniversary Encyclopedia, page 21: "The space invader, Dark Matter, and its head, Zero. Dark Matter has often made an appearance as the true villain who controls people with its dark clouds."
*
What's the potency needed to resist it?: It doesn't matter the amount of targets affected, a dark cloud in a room controlling 10 targets isn't any better than dark clouds in a city controlling 100 targets, because any 1 person resisting dark clouds of any size would still be surrounded by clouds that would otherwise control 1 target. It's not the type of ability that, the more targets it affects, the more every little bit of it can affect on its own. That's like saying that resisting a cloud of poison surrounding a whole planet holds a higher scale of "Poison Resistance" than resisting the same thing over just a room.
Range and amount of targets affected: 
1º invasion in Kirby's Dream Land 2:
*In short: 1 Dark Matter being vaguely affects Dreamland with his dark clouds, but how much of it he affected it's unknown; It could have been almost everyone in it minus the protagonists, or only all the bosses & some minor enemies.
*"The Latest Kirby of the Stars Large Encyclopedia" (最新星のカービィ大百科), page 106: Dreamland is being "targeted", whatever this means. It's pointed out that this is a country where everyone is everyone is friends, which explains why bosses & enemies attack you.
*Nintendo Power magazine N°72 (May 1995): It claims that Dreamland has been having "pests", implying an unexplored amount of the foes Kirby & co. have been facing were under some kind of malice.
*All the bosses in the game fight you, but after you beat them can go & play mini-games with them for fun.
**Whispy Woods in particular had a face mask only shown in this game, maybe indicating he was trying to protect himself from the clouds but failed.
*Some mini-bosses have creatures captured in bags hanging on chains, like the Animal Friends, which would be nonsensical for them to do on their own in a place where, again, "everyone is friends". To be fair, there are games were bosses/enemies have no reason to fight you beyond a rivalry, but this are quick changes in their decision to fight you and an active antagonism in a deliberate way.
*The last level, Dark Castle, seems to be one of King Dedede's normal castles, but with violet colors in all of it and dark clouds above it that are gone after Dark Matter is defeated. As such, being implied that everyone in it is under Dark Matter's influence, which doesn't get into Kirby & co. while in the sealed environment that being inside the castle.
**Note!: It's rumored that page 105 of that "The Latest Kirby of the Stars Large Encyclopedia" states Dark Castle to have been created by Dark Matter with magic, we need a scan of that. If the book claims more about its mind control then better.
*Team Kirby Clash Deluxe & Super Kirby Clash (Dark Matter Blade description): That Dark Matter is remembered as plotting to shroud the world in darkness, implying he wanted to extend his dark clouds into the world, eventually.
**Note: It's rumored that ""Kirby of the Stars 3" Nintendo Official Guidebook" (『星のカービィ3』任天堂公式ガイドブック) page 8 states this Dark Matter being to be the same as the one that shows up in the next game, which we need a scan for. If true, then "shroud the world in darkness" probably refers to the plot of that game.
*Kirby Battle Royale: The background of the Obstacle Arena stage of the Slam Hockey minigame shows many areas of Popstar that are references to other games (See here or here). 1 of them is the Rainbow Islands, where Dream Land 2 takes place. This could be seen as a reference of how big those areas are compared to each other.
2º invasion in Kirby's Dream Land 3:
*In short: 0 and Dark Matter were vaguely affecting Planet Popstar with dark clouds, but how much of it they affected it's unknown; It could have been almost everyone in it minus the protagonists, or only all the bosses & some minor enemies.
*Kirby’s Dream Land 3 Jap. site:
**"A cloud-like object approaching "Popstar" is coming closer! ! The black cloud stopped above and broke out small clouds. Small clouds are scattered everywhere."
**Kuu: "It's gonna be tough for Popstar!"
**"The scattered small clouds merged with King Dedede and his comrades, and they began to control them!", visually, we can see dark auras with a string above them, which is not seen in the game. Potentially implying those invisible, or it's just a visual to show they're controlled.
**"Can they save Popstar..."
**As far as the protagonists' resistance goes, so far they didn't have a feat at the start of the game due to not being reached.
*Kirby's Dream Land 3 American website: "A threatening cloud of Dark Matter is luring the inhabitants of PopStar to evil, but not if Kirby & Co. have anything to say about it!"
*Nintendo Power volume 102 page 72:
**"Read on to find out how a little guy [...] can protect the entire planet of Popstar from an alien invasion!"
**"Clouds over Dream Land"
**"Kirby must slurp his way though [stages] to drive back the cloud of Dark Matter that's turning the inhabitants of Popstar toward evil."
*Nintendo Power volume 102 page 74: "Some of Kirby's friends have escaped the Dark Matter" I'm confident this refers to how initially 0 sent dark clouds and neither those characters or Kirby himself were reached, before they go there to "drive them back".
*Nintendo Power volume 102 page 76:
**"Even if you get though every stage and defeat the Dark Matter menace, your quest won't be finished. To complete 100% of the game, you must also fulfill a secret mission in each state." More of the same, to fight the Dark Matter being you need to do this secret missions, so not doing them & defeating the Dark Matter menace refers to driving back their effect on the planet.
**"Whispy's mind has been clouded by Dark Matter, and it's turned him into one unhappy camper."
*Gameplay & visuals wise:
**In the opening, 0 & Dark Matter get close to Popstar as a planet-sized dark sphere that shrinks and extends tentacles everywhere, reaching the bosses of the game & a Waddle Dee. Affecting them and implying the minor enemies like Waddle Dees to be affected too.
**The gamemap shows all that darkness "hugging" Popstar. It's not as big as Popstar, it only gets to be in a fraction of it. The levels we go to were reached by those tentacles.
**After beating each boss this dark clouds get expelled from the areas of Popstar where they were & blow up. They were not seen otherwise playing levels & battling the bosses, meaning that the dark clouds were unseen in the areas Kirby & co. went through.
**At the end, Kirby & Gooey go to the Hyper Zone, that dark sphere that had those tentacles. The other Animal Friends don't go there. As the Jap. site said above, that dark sphere is a dark cloud too.
***Kirby 20th Anniversary Encyclopedia, page 21: Canonically Gooey flies there too (That player didn't use Gooey).
3º invasion in Kirby 64: The Crystal Shards:
* In short: Zero-Two and Dark Matter were vaguely affecting Ripple Star with dark clouds, but how much of it they affected it's unknown; It could have been almost everyone in it minus the protagonists, or only all the enemies. Also, their effect reached into other planets (See their profiles), but I'm not gonna list that as we saw no dark clouds there & there weren't stated to be there, even if dark clouds were shown to be invisible. I don't know how they did that, maybe it was a more common form of mind control, or maybe they were in fact unseen dark clouds.
* Kirby 64: The Crystal Shards Prima Strategy Guide page 90: "The once-beautiful world of Ripple Star has been taken over by Dark Matter. It's up to Kirby and his friends to save the day and all of the fairies on Ripple Star.", "You soon find the first shard, guarded by two Ghost Knights."
* Game, end of the penultimate level: Kirby, Ado, King Dedede and a Waddle Dee chill near a big black cloud sphere with apparently lesser black clouds around them.
* Kirby 64: The Crystal Shards Prima Strategy Guide (again): It confirms that what happens next is Kirby& Ribbon going inside that black cloud above.
* Game, penultimate final boss and cutscene after it: Kirby inside that cloud fights a Dark Matter being, comes out off-screen, they use the power of the Crystal they had to drive back all the clouds from the planet, we see blacks go away from regular, non-fighting residents.
* Game, same cutscene and final level: Zero-Two and maybe Dark Matter (Either it was only Zero-Two & it later created more Dark Matter beings, or they were all there while small in size) create the planet Dark Star, which is part solid and filled with dark clouds.
Others:
Not Dark Matter. But Jamba Heart pieces/Void, the originator of darkness, his ancestor. So he may have the same or similar powers on that basis.
* Famitsu issue of ~January, 2018:
** This scan:
*** "After that, a suspicious cloud has covered Dedede's castle. Feeling this is a strange phenomenon, Kirby headed to Dedede's castle."
*** "Dark clouds shroud Dededee's castle. For what reason are the Waddle Dees bringing their master, King Dedede, food?" I would think the reason is because they're all being mind-controlled by the dark clouds, the game doesn't say so explicitly but the text below says as much.
** This other scan: "[...] peace in Dreamland. However, because of the light spilling from space, everywhere seems to be getting strange."
==Sensing what they're saying==
Short version: Characters proven to understand what Waddle Dees say as words have Extrasensory Perception & Automatic Translation since the latter are actually just saying "wanya wanya", and this has been portrayed as a sensing ability when at least 1 character regularly understands them.
Evidence and then conclusions: Initially said that it wasn't known if Waddle Dees can speak human languages, that they speak as per onomatopoeia, and that perhaps Kirby senses whatever they're saying, which was taken in as a fact.
*Interview in the Nintendo DREAM magazine, August 2017: Full scan alone, translations 1 out of 5, 2 out of 5, 3 out of 5, 4 out of 5, and 5 out of 5.
Later it was proven that Waddle Dees do in fact talk by saying "wanya wanya" while meaning full sentences.
*Kirby and the Forgotten Land: Captured Waddle Dee's figurine Jap. description, Captured Waddle Dees' figurine Jap. description
As such, with the games always portraying Kirby understanding everything they say,Kirby's AvalancheKirby Battle RoyaleKirby's Return to Dream Land Deluxe it implies that the comment on him sensing whatever they're saying is correct.
Specifically, that interview was vague & unusable on its own, but the confirmation of how Waddle Dees talk makes it usable, even if we weren't explicitly told "Kirby senses what they mean" along the way. Going off of this, other characters should have the same thing going on if they're proven to understand Waddle Dees, which again, it's not explicitly said.
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Others:
There is 1 throw away line that says that Kirby "doesn't speak language", regardless of how he does this every time he talks, should this mean he literally doesn't speak any language and everyone just senses what he means to say too in the form of words? Could be, but in context it's more likely that they just meant to say that, they can't have Kirby say full sentences in cutscenes because they prefer to keep obscure his ability to talk.
It could be interpreted that Kirby understands Clawroline when he & Elfilin talk to her, but only the latter is shown to carry the conversation and so, one could argue Kirby doesn't know anything of what she's saying.
*Kirby and the Forgotten Land, talking to Clawroline, post-main story.
When it's established pretty well that she doesn't talk a human language but onomatopoeia. At the same time, it's shown that she means full sentences.
*Kirby and the Forgotten Land, "Meow, Meow! (Wake Up, Leon!)"'s figurine Jap. description, Leon & Carol's figurine Jap. description
*Interview in Nintendo DREAM magazine of June 2022 (Translation of the part that matters)
In this other source, one could infer that Waddle Dees "don't talk while talking". Technically, it doesn't say so explicitly, and so a less in-deep look at the series makes it dismissible due to Waddle Dees always talking with words.
*Kirby 64: The Crystal Shards Jap. site, Character Bios, translation here
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