Jevil

Jevil is a Darkner from Card Kingdom. He is Chapter 1's bonus boss, and thus a holder of a Shadow Crystal.
== Profile ==
=== Appearance ===
Jevil is a short, pudgy imp with a round gray face, elven ears, clown-like eyes with small yellow pupils and black sclerae, and a large smiling mouth with yellow, sharp teeth. He has a long, purple tongue which can be seen either when he laughs, or during some of his attacks. He has a purple tail shaped like a capital letter J. He is dressed in a purple shirt, black trousers, a black cape, green slippers, black socks, purple mittens, and a lime green and yellow jester's collar. He wears a purple and black harlequin jester hat with two small yellow bells. His head appears to be connected to his body via a coil spring (akin to that found in a jack-in-the-box), which is only exposed when attacked.
=== Personality ===
Jevil is described as mad since he met a "strange someone." Prior to losing his mind, he was a jester with a presumed humorous attitude and a friend of Seam. 
Now insane, Jevil is still portrayed as an eccentric individual. His dialogue is rife with maniacal laughter, repeated words, rambling puns, and strange sentences, and he has a sadistic sense of entertainment, considering battle with the party to be a "GAME." He has a very cynical view of the world around him and considers everyone around him to be trapped while he is the only one truly free, despite ironically being jailed from the world. Seam, however, finds some sense in the words of Jevil, indicating that his insanity might be a form of awareness.
Jevil, like other Card Kingdom denizens, is implied to be a playing card. Specifically, he is implied to be the Joker, as he was the court jester. This is also evidenced by how he claims that he can do anything, as the Joker's most frequent use is a wild card. 
== Main Story ==
=== History ===
Some time before Kris and Susie entered the Dark World, Jevil worked as the Court Jester alongside Seam, who was the Court Magician. One day, however, Jevil encountered a "strange someone," and his personality shifted permanently. Seam explains that Jevil "started saying bizarre things that didn't completely make sense – but didn't completely not make sense, either." Eventually, Jevil started viewing the world as a game, and everyone else as its participants. Because of this, Seam was forced by the four Kings to lock Jevil away underneath Card Castle.
=== Chapter 1 ===
When talking to him for the first time, Jevil explains that while it appears he is locked in a cell, he is the only person who is actually free while everyone else is locked away. However, he goes on to explain that he is lonely and that he wishes for more people to be "free" with him. He instructs the party to find the key to open his door, noting that the "OLD SHOPKEEPER," Seam, knows something about it.
==== Broken Keys ====
To get the key to Jevil's cell, the party heads out to collect the three Broken Keys (A, B, and C).
Seam hands over Broken Key A after Kris mentions Jevil, and also hints towards the location of the Broken Key B. "Walk where the stars don't shine."
The party finds Broken Key B in a chest in the Scissor Dancers area in the Forest. The chest is visible on the southeast side, but can only be accessed through a secret dark path. The dark path can be found in the southwest corner of the area, at the middle of the south edge of the square. After crossing the path, the party can encounter three Rabbicks before reaching the chest.
Broken Key C is found in a chest behind a spade and diamond puzzle northeast in the Field, before the Great Board. The combination is the order of the shaped doors of the main floors in Card Castle. It starts from the bottom and always contains non-violent enemies, excluding Spade. This order is Diamond, Heart, Club, Spade.
After retrieving the three, Kris takes them to Malius, who combines the parts into a single Door Key. The smith then warns the party of the evil energy the Key holds and advises them not to use it. After Kris uses the Key to Jevil's cell, a smaller door materializes and opens. He invites the party to enter. Jevil waits at the far right of the area, and wants to "PLAY" a "SIMPLE NUMBERS GAME." He continues, "WHEN YOUR HP DROPS TO 0, YOU LOSE!" before engaging the party in combat.
==== After Defeat ====
Once defeated, Jevil warns the party of future events through various metaphors, before transforming into a Devilsknife and granting an item to the party. The item Jevil grants the party, along with the dialogue he delivers, depends on the method by which he was defeated:
* If Jevil is Pacified by Ralsei, he proclaims that he will sleep for "THE OTHER 100 YEARS," and that "A NIGHTMARE WILL AWAKEN IN [their] HEARTS, IN THE SHADOW OF THE KNIGHT'S HAND." He questions the party's ability to stop it, before giving them the armor Jevilstail, becoming the Devilsknife, and flying upwards, disappearing.
* If Jevil is beaten by fighting, he prophesies about the return of the "Queen" (foreshadowing her role in Chapter 2), along with "THE KNIGHT'S HAND" drifting closer, before warning the party many are stronger than him. He ends this speech by saying, "TAKE ME AND DO YOUR STRONGEST," becoming the Devilsknife, and flying upwards, disappearing as Devilsknife is given to the party (presumably the one Jevil himself turned into).
If the party has too many weapons or armors to take the item, a chest holding said item appears outside the cell, so the party can take it when they have space. Jevil, unlike Spamton, does not say anything about it.
== In Battle ==
=== Attacks ===
The attacks he uses depend on how much health he has left or how tired he is, which can be split into 5 phases:
* Phase 1: Initial phase
* Phase 2: Jevil's Tiredness must be at least 2 or his HP must be 2800 or lower (80%).
* Phase 3: Jevil's Tiredness must be at least 4 or his HP must be 2100 or lower (60%).
* Phase 4: Jevil's Tiredness must be at least 6 or his HP must be 1400 or lower (40%).
* Phase 5: (Automatically entered after Phase 4's final attack)
If Jevil's HP is reduced to 525 or lower (15%), he will immediately skip to the "fakeout attack" just before his "Final Chaos".
; All Phases
* The first time Jevil uses attacks in these phases, he uses them in order, and always says a particular voiceline before the attack. After exhausting the unique attacks of a phase (except Phase 4), if Jevil is not advanced to the next phase, he reuses attacks from that phase randomly.
; Phase 1
* Turn 1: Jevil teleports to random spots in the areas to the left and right of the Bullet Board and quickly spews volleys of five spade bullets centered at the SOUL that advance linearly beyond the board until the attack ends. 
* Turn 2: Ten large spade bullets appear around the Bullet Board in a circle and quickly start bounding, one after the other, in a spiral pattern, towards the center of the Bullet Board and beyond. They move toward the middle either clockwise or counterclockwise. The direction of the spiral remains the same throughout the attack in earlier phases, but can shift later in the fight. It is possible to dodge this attack by waiting in the space of the Board between any two spades, causing all of them to miss. 
* Turn 3: Bombs with hearts in the center quickly fall to the level of the Bullet Board and detonate into four hearts in a square formation rotating at the center point, which fly towards the SOUL and go beyond. This continues until the attack ends.
* Turn 4: Four scythes oscillate around the center of the Bullet Board while rotating in either direction.
; Phase 2
* Turn 1: Rows of horses fly across the arena from the left to the right as if they were textures on a 3D cylinder. They all bob up and down according to a pattern, and their path skews up and down over time. This can be almost dodged by holding the left arrow key, while sticking to the bottom left corner of the Board. However, this only works the first time the attack shows up each Jevil Encounter.
* Turn 2: Bombs with clubs in the center quickly fall to the level of the Bullet Board and explode into club bullets, which aim at the SOUL in a 3-way spread pattern and go beyond the board. This continues until the attack ends.
* Turn 3: Diamonds rapidly spawn from the bottom of the screen in random locations and fly upwards - essentially a sped-up version of one of Rudinn's attacks.
* Turn 4: Spade bullets circle the screen and attack just as in phase 1. However, this attack lasts slightly longer, the spades move slightly faster, the SOUL's movement speed increases, and the spiral may change direction at random.
; Phase 3
* Turn 1: Just like the carousel attack from phase 2, except there are both horses and ducks, and their path does not skew. There are still only 3 rows of them, yet the horses and ducks go up and down at opposite intervals to each other. Rarely, one of the ducks may appear with Everyman's head. 
* Turn 2: Bombs with spades in the center fall quickly fall to the level of the Bullet Board and explode into 10 spade bullets that together shoot out evenly in all directions.
* Turn 3: Clubs appear around the edges of the screen, shooting 3 individual 3-way spread bursts of bullets aimed at the SOUL. The three bursts aim and fire at the place where the SOUL was, so there appears to be a small amount of spread as they fly towards the SOUL. This is, in essence, a sped-up version of one of Clover's attacks.
* Turn 4: Four scythes oscillate around the center of the board, just as in phase 1, but this time, a larger red scythe appears either near the top of the board or the bottom, and fly horizontally across the screen, damaging the target if they are hit by it. It randomly starts at either top or bottom. It always alternates which side it is on, so if it starts at the top, the order is "top, bottom, top". It appears 4 times, but can only hit the SOUL the first 3 times before the attack ends.
; Phase 4
* Turn 1: Jevil teleports to random spots in the areas to the left and right of the Bullet Board, much quicker than the Phase 1 attack, and throws one diamond bullet aimed at the SOUL that advances linearly and goes beyond the board.
** After this attack, combat flavor text changes to "CHAOS BOMB was prepared FOR YOU."
* Turn 2: Every previous version of the suit bombs (hearts, spades, clubs) spawns randomly, as well as a diamond bomb, which fires 3 diamond bullets aimed at the SOUL, each one slightly slower than the previous, forming a straight line.
* Turn 3: Jevil looks tired, and attacks with a much slower version of the diamond attack from phase 2, where diamonds spawn from below the arena and fly up. These diamonds give a very large amount of TP.
** Combat flavor text changes to "Something terrible is coming...!"
* Turn 4: The arena grows to fill the whole screen. Giant versions of the Devilsknife fall from the top of the screen, dealing damage if touched. If they touch the ground, they create a pillar of white light that may also damage the party members. These Devilsknives appear randomly along the screen until the party members survive long enough, then a set pattern falls going from the edges of the screen in, then another falls dead-center, followed by some more around the edges, and a final giant Devilsknife that fills the screen falls from the sky and ends the attack. This final Devilsknife can easily be avoided by staying away, since it cannot go all the way down.
; Phase 5
* Jevil's sprite appears to move around so rapidly it leaves behind motion blur. Repeats various attacks from all phases (with Chaos Bomb being 3x more likely to be picked). He uses the default dialogue lines for the rest of the battle.
* At the start of each of his turns in Phase 5, Jevil's Attack increases by 0.5 (up to a maximum of 11) and his Defense decreases by 3 if it is above -10.
; Victory Conditions
There are three ways to defeat Jevil:
# Fully deplete Jevil's HP
# Cast Pacify after sufficiently tiring Jevil (can be done before the end of Phase 4, ending the fight early, requires Jevil's tiredness to be at least 9)
# Cast Pacify when on Phase 5 and turn 30 (takes one turn less per level of tiredness, works the same whether the fight is progressed by ACTing or fighting)
=== Strategy ===
Jevil's battle is unique in Chapter 1, using several voice line audio clips and what appears to be a 3D-rendered stage. The battle is also fairly difficult; all of Jevil's attacks have a large number of projectiles that are fast-moving and/or have complex trajectories, who can easily take down a party member (especially Ralsei). This makes it difficult to have a free turn to use the Heal Prayer spell.
In the current patch of the PC version of the game, it is possible to tab out of the game in fullscreen via the Windows/Super key or Alt-Tab. This glitch causes the game to slow down and makes the fight easier, but is obviously not viable in other console releases. It's recommended to balance the party members' Defense to avoid having someone too frail that could constantly be taken down. It is suggested that the party fills their inventory with consumables, with the Top Cake/Spin Cake, Clubs Sandwich, and Revive Mints being the best to bring, although the player may want to save these more powerful items for the Spamton NEO or Queen's fight. The rest of the inventory should be filled with Darkburgers, Choco Diamonds and Hearts Donuts, which are the best items for Ralsei, Kris and Susie respectively. Discarding Ralsei's Manual or the Glowshard to bring an additional healing item is optional, but can be done if an extra inventory slot is really needed.
Upon defeating Jevil, the party is awarded either the Jevilstail (armor; +2 Attack, +2 Defense, +2 Magic) if pacified or the Devilsknife (weapon (axe); +5 Attack, +4 Magic, Rude Buster: -10 TP cost) if defeated through violence. The respective item is placed into a chest instead of the party's inventory if the latter is full.
In order to spare him, the party must make Jevil tired and Pacify him with Ralsei. Pirouette costs 20% TP and only takes Kris's turn, adds 0.5 to Jevil's Tiredness, and has a "random" effect dependent on which turn it is:
==== Pirouette Rotation ====
The Pirouette ACT has a seemingly random effect. In actuality, the effects for Pirouette rotate indefinitely until the battle ends, following this set order. For associated flavor text, see #Flavor Text.
* Turn 1: No combat effects (plays a noise). Note that Pirouette cannot be used on the first turn of the battle due to starting with no TP.
* Turn 2: Lowers Jevil's defense by 4 unless already below -16
* Turn 3: 60% fewer invincibility frames for this turn
* Turn 4: Decreases Jevil's Attack by 30% for this turn
* Turn 5: No combat effects (a bird flies across the screen).
* Turn 6: 25-55 HP heal to a random party member
* Turn 7: Party members' HP bars are shuffled. (Each party member takes on the current and max HP of the party member to their left or right, including the color of their HP bar.) Then, each fallen party member has their negative HP split among all three party members (with rounding) and are then revived with 1 HP. Then, any party members that still have negative HP (due to the splitting) are revived with 1 HP.
** Using this effect 2 or more times can cause a party member to receive their regular HP bar back. At the end of the battle, all HP bars return to normal.
* Turn 8: Increases Jevil's Attack by 25% for this turn
* Turn 9: 36-50 HP heal to all party members
Hypnosis costs 50% TP and takes the entire party's turn, adds 1 to Jevil's Tiredness, reduces his Attack by 0.5 if it is above 10, and decreases his Attack by 30% for this turn.
The best strategy to defeat Jevil through pacifying is to have Kris continually using Pirouette while Susie and Ralsei defend every turn to reduce damage, and healing when necessary. This is a fair bit easier than defeating Jevil through violence.
=== Quotes ===
==== Speeches ====
* BOO HOO, BOO HOO, UEE HEE HEE.
* SO LONELY, LONELY, I BE...
* BUT LO, THREE VISITORS STANDING INSIDE?
* WHO ARE YOU FEW?
* [Ralsei] Nice to meet you! I'm Ralsei, this is Kris, and...
* [Susie] So, what the hell are you doing in there?
* I AM INNOCENT, INNOCENT. I JUST WANTED TO PLAY A GAME, GAME.
* BUT THE BORING KINGS FOUND SUCH FUN TO BE A TROUBLE.
* AS PUNISHMENT, THEY CRAVED TO IMPRISON MY BODY.
* BUT I'M FAST, FAST, CLEVER, CLEVER.
* THEY LOST THE CHASE, AND LOCKED UP THEIR ENTIRE RACE,
* BUILDING A PRISON AROUND THE WHOLE WORLD. NOW I'M THE ONLY FREE ONE.
* [Ralsei] Huh? Free? But you're clearly the one behind bars...
* THINGS DON'T SEEM SUCH FROM HERE, LIGHTNERS!
* [Susie] Well, sounds like you don't need any help, then.
* THAT IS UN-SO. I GROW LONELY IN MY LITTLE FREEDOM.
* SO, SHALL YOU PLAY A GAME WITH ME, ME...?
* I'LL SHOW YOU WHAT IT MEANS TO BE FREE!
* [Play a game]
** FIND THE KEY, AND I'LL LET YOU BE FREE, FREE.
** THE KEY IS HIDDEN FROM THE EYES. THE OLD SHOPKEEPER KNOWS A SECRET.
* [Do not play a game]
** BOO HOO, BOO HOO, UEE HEE HEE!!
** HOW CAN YOU REFUSE, WHEN YOU ARE ALREADY PLAYING...?
* FIND THE KEY, AND I'LL LET YOU BE FREE, FREE.
* THE KEY IS HIDDEN FROM THE EYES. THE OLD SHOPKEEPER KNOWS A SECRET.
; After repairing the key
* UEE HEE HEE, THE KEY, THE KEY.
* A MARVELLOUS FUN IS ABOUT TO BREAK FREE.
* WON'T YOU LET YOURSELF OUTSIDE?
* [Use Key]
** [Narrator] (You put the Door Key in front of the Door.)
** [Narrator] (The Door Key created a Door.)
* [Do not]
** YOU CAME TOO FAR! YOUR CHOICE HAS RUN OUT!
** [Narrator] (The Door Key created a Door.)
* DO NOT TARRY! [Unused]
==== Pre-Battle ====
* UEE HEE HEE! VISITORS, VISITORS! NOW WE CAN PLAY, PLAY!
* THEN, AFTER YOU, I CAN PLAY WITH EVERYONE ELSE, TOO!
* [Ralsei] So what are we playing, exactly...?
* OH, IT'S JUST A SIMPLE NUMBERS GAME.
* WHEN YOUR HP DROPS TO 0, YOU LOSE!
* [Susie] So that's the kinda game you wanna play, huh...?
* [Susie] Then, I gotta warn you...
* [Susie] You're dealing with a couple of sharks.
* UEE HEE HEE! SHARK-TO-SHARK! I WOULDN'T HAVE IT ANY OTHER WAY!
* NOW, NOW!! LET THE GAMES BEGIN!!
==== Battle ====
* IT'S ALL TOO MUCH FUN!!! [Neutral]
* THESE CURTAINS ARE REALLY ON FIRE! [Neutral]
* THIS BODY CANNOT BE KILLED! [Neutral]
* A CHAOS, CHAOS! [Neutral]
* PLEASE, IT'S JUST A SIMPLE CHAOS. [Neutral]
* I CAN DO ANYTHING!! [Neutral]
* CHAOS, CHAOS, CATCH ME IF YOU CAN! [Phase 1, #1]
* SHALL WE PLAY THE RING-AROUND? [Phase 1, #2]
* MY HEARTS GO OUT TO ALL YOU SINNERS! [Phase 1, #3]
* HA, HA. LET'S MAKE THE DEVILSKNIFE. [Phase 1, #4]
* PIIP PIIP, LET'S RIDE THE CAROUSEL GAME. [Phase 2, #1]
* HEE, HEE, HAVING FUN?! JOIN THE CLUB! [Phase 2, #2]
* HEARTS, DIAMONDS, I CAN DO ANYTHING! [Phase 2, #3]
* WHO KEEPS SPINNING THE WORLD AROUND? [Phase 2, #4]
* YOU KIDS ARE REALLY KEEPING UP! [Phase 3, #1]
* NU-HA!! I NEVER HAD SUCH FUN, FUN!! [Phase 3, #2]
* A BEAUTY IS JOYING IN MY HEART! [Phase 3, #3]
* EVEN DEVILSKNIFE IS SMILING! [Phase 3, #4]
* IT'S SO EXCITING... I CAN'T TAKE IT! [Phase 4, #1]
* THIS IS IT, BOISENGIRLS! SEE YA! [Phase 4, #2]
* ENOUGH!! YOU KIDS TIRED ME UP! [Phase 4, #3]
* KIDDING! HERE'S MY FINAL CHAOS! [Phase 4, #4]
* Alright, you convinced me!! [Unused]
; Voice Lines
* I CAN DO ANYTHING!
* UEE HEE HEE!
* CHAOS, CHAOS!
* METAMORPHOSIS! [while becoming Devilsknife]
* BYE-BYE! [immediately before using Final Chaos]
* OH! [while shooting bullets from his mouth and teleporting]
* THE TRUE AND NEO CHAOS!As stated by Toby Fox in his SGDQ 2019 donation comment.
==== Post-Battle ====
* [After pacifying]
** WHAT FUN!! I'M EXHAUSTED!! YOU KIDS TIRED ME UP!!
** NOW I WILL SLEEP FOR THE OTHER 100 YEARS.
** UNFORTUNATELY, YOU KIDS CANNOT HAVE SUCH A PLEASANT DREAM.
** FROM NOW, A NIGHTMARE WILL AWAKEN IN YOUR HEARTS.
** IN THE SHADOW OF THE KNIGHT'S HAND...
** LIGHTNERS, CAN YOU STOP IT?
** UEE HEE HEE!
** EITHER WAY, A MISCHIEF-MISCHIEF, A CHAOS-CHAOS...!
** LIGHTNERS! FROM INSIDE YOUR LITTLE CELL!!
** TAKE THIS AND DO YOUR STRONGEST---!
* [After beating him through the use of fighting]
** HA HA HA. WHAT FUN!!!
** YOU'RE FAST, FAST, STRONG, STRONG.
** BUT THERE ARE YET FASTER, YET STRONGER.
** THE HAND OF THE KNIGHT IS DRIFTING FORWARD.
** SOON, THE "QUEEN" RETURNS, AND HELL'S ROAR BUBBLES FROM THE DEPTHS...
** LIGHTNERS, CAN YOU STOP IT?
** UEE HEE HEE!
** EITHER WAY, A MISCHIEF-MISCHIEF, A CHAOS-CHAOS...!
** LIGHTNERS! FROM INSIDE YOUR LITTLE CELL!!
** TAKE ME AND DO YOUR STRONGEST---!
* [Narrator] (You got ShadowCrystal.)
* [Narrator] (A strange chest appeared outside the room...) [If the equipment is full]
* [Narrator] (DEVILSKNIFE was added to your WEAPONs.) [After beating him through the use of fighting]
* [Narrator] (JEVILSTAIL was added to your ARMORs.) [After pacifying]
=== Flavor Text ===
* There is no strategy to defeat the enemy. Good luck! [Check]
* LET THE GAMES BEGIN! [Encounter]
* The world is spinning, spinning. [Neutral]
* The air crackles with freedom. [Neutral]
* JEVIL is laughing incomprehensibly. [Neutral]
* It feels like a whirlwind. [Neutral]
* Smells like chaos. [Neutral]
* CHAOS BOMB was prepared FOR YOU. [Pre-Chaos Bomb]
* Something terrible is coming...! [Pre-Final Chaos]
* JEVIL's pulling out all the stops! [Phase 5]
* Kris spun around! JEVIL got slightly more TIRED, and...! [Pirouette]
** Something happened! [Unused]
** It was just foley! [Turn 1, nothing happens]
** JEVIL felt at ease! JEVIL's defense dropped! [Turn 2, lowers Jevil's defense by 4 unless already below -16]
** Awkward! Upcoming attack will hurt rapidly! [Turn 3, 60% fewer invincibility frames for this turn]
** Tranquil! The dance defended the party! [Turn 4, decreases Jevil's Attack by 30% for this turn]
** What! It's nothing but a useless bird! [Turn 5, nothing happens]
** It felt comforting! [Turn 6, 25-55 HP heal to a random party member]
** Everyone's HP got jumbled up! [Turn 7]
** JEVIL's upcoming move got powered up! [Turn 8, increases Jevil's Attack by 25% for this turn]
** A perfect 10! [Turn 9, 36-50 HP heal to all party members]
* [Hypnosis]
** Kris gazed strangely!
** JEVIL's next attack weakened!
* [Hypnosis]
** Susie spun something around!
** JEVIL's next attack weakened!
* [Hypnosis]
** Ralsei chanted something!
** JEVIL's next attack weakened!
* JEVIL became more TIRED! [Hypnosis, if JEVIL is not sufficiently tired]
* JEVIL's looking exhausted! [Pirouette/Hypnosis, if JEVIL is sufficiently tired]
** JEVIL seems exhausted...? [Unused]
* JEVIL is truly exhausted! [Tired]
== Gallery ==
 Jevil battle jumping.gif | Jevil's in-battle animation.
 Jevil battle unused dancing.gif | Jevil's in-battle dancing animation, with unused back view frames.Restored full Jevil Dance animation - Reddit
 Jevil battle tired.png | Jevil's "tired" sprite.
 Jevil battle laughing.png | Jevil laughing
 Jevil battle spared.png | Jevil's sprite when teleporting, being spared, or defeated
 Devilsknife item.png | Jevil's weapon, Devilsknife
 Jevil dance screenshot.gif | Jevil moving extremely quickly around the screen, leaving motion blur.
 Jevil battle background screenshot.gif | Jevil's battle arena's background.
 Jevil arena background screenshot.png | Carousel in the background of Jevil's arena.
 Jevil artwork kanotynes.png | Jevil's original design by kanotynes.
 Jevil artwork LINE sticker.png | Jevil LINE sticker
 Jevil plush artwork.png | Jevil plush sold on Fangamer.
== Trivia ==
* Jevil's name is likely a portmanteau of the words joker or jester and devil.
* Jevil is one of only four characters to currently have proper voice acting in Deltarune, the other three being Spamton, Tasque Manager, and Queen. Jevil says "CHAOS, CHAOS," "I CAN DO ANYTHING," and "METAMORPHOSIS!" for normal attacks, and "BYE-BYE!" and "THE TRUE AND NEO CHAOS!" before his "final chaos." The voice acting, barring the "BYE-BYE!" voice line (which is identical in both localizations), is localized in the Japanese version as "カオスだよ、カオスだね！ (Kaosu da yo, kaosu da ne!)," "なんでもできる！ (Nandemo dekiru!)," "変身！ (Henshin!)," and "真のネオカオス！ (Shin no neo kaosu!)," respectively.
** The lines, "I CAN DO ANYTHING!" and "METAMORPHOSIS!" are possible references to Loose Clown, a virtual sticker set that can be purchased from the LINE store.
*** Jevil's LINE stickers also reference Loose Clown's "I can do anything" sticker in the official Deltarune sticker set.
* The line, "THESE CURTAINS ARE REALLY ON FIRE!" is almost certainly a reference to the term "curtain fire," an alternative name for the "bullet hell" sub-genre of shoot 'em ups, of which many attack patterns in both Undertale and Deltarune are reminiscing of and often compared to.
* Jevil is likely based off of the Joker from a standard 52-card deck. The card itself can add randomness and confusion to a game, and Jevil's character is likely a reference to it.
** The Joker card also does not have a suit and is likely why Jevil is not "locked" to a specific suit to use in battle.
** Songs in the music folder of Deltarune refer to his music as prejoker.ogg and joker.ogg.
** Jevil's imprisonment could be a reference to how the Joker card is excluded from the deck in many card games, similarly to how Jevil is excluded from the rest of the card-based kingdom.
* Before Deltarune was announced, Toby Fox stated that Toriel's battle theme in Undertale, Heartache, was originally composed under the title of "Joker Battle" for an unused RPG idea.That game… I ended up repurposing a few of the songs from it for Undertale. For example, "Heartache" was originally called "Joker Battle" and "Bonetrousle" was originally the main battle theme. - Toby Fox, Indie World Since this RPG idea was later revived as Deltarune, it is safe to assume that Heartache was originally intended to be Jevil's battle theme, given Jevil's multiple allusions to the Joker card. In the final game, Jevil's theme, THE WORLD REVOLVING, is an original composition.
* The line, "HOW CAN YOU REFUSE, WHEN YOU ARE ALREADY PLAYING...?" may be a reference to the line "HOW DO YOU EXPECT TO OUTRUN ME. WHEN I AM ALREADY HERE?" spoken by the character Lord English from Homestuck, a webcomic series which Toby Fox has made music for.
** However, it could also simply be a self-aware line, as the player is playing Deltarune.
* One of the Hypnosis actions is "Susie spun something around," a likely reference to the Mad Duck in EarthBound, which has an attack with the text "Mad Duck made something spin around!"
* Jevil, along with Lancer, Rudinn, Hathy, Clover, King and the uncredited King of Diamonds, were designed by kanotynes.
* The carousel from the battle arena background is a picture of a Galloper Carousel from The Hoppings, a traveling fair from Newcastle upon Tyne.I found the actual location of the carousel in the Jevil fight background. - Reddit
* Jevil's voice clips are based on the "Joker" character from Fighters Destiny.
* The "3D" carousel in the background is actually a two-dimensional optical illusion.
* Prior to the Deltarune Chapter 1 & 2 release, the "A perfect 10!" Pirouette only healed 20-40 HP instead of 36-50.
* According to Toby Fox during Undertale's 6th Anniversary Livestream, Jevil's peculiar way of speaking was intended to emulate the poetically stilted syntax of localized RPGs.
** Toby additionally noted there was a bug at launch where Jevil's scythe attacks would instantly kill the player. This was initially not reported due to players presuming it was an intentionally difficult part of the fight.
* At the Fangamer FAQ with Spamton during the Spamton Sweepstakes event, Spamton implies he has known Jevil in the past.
* The flavor text, "The air crackles with freedom," also appears when fighting Spamton NEO.
* Jevil seems to be known to some of the people in the Cyber World for reasons unknown, though Jevil seems to know about Queen's existence beforehand and Queen herself seems to already know King as well. 
** Tasque Manager reacts in anger if a party member equips Devilsknife or Jevilstail and asks them to get rid of it, hinting that she may know Jevil and dislikes him for his love of chaos since she likes to keep things in order.
** Spamton also knows about Jevil, calling him a clown and appears to dislike him as well. For example, when backtracking to Cyber City after reaching Queen's Mansion, the NPC Werewire before the first crossing mentions that they repeatedly petitioned for a public merry-go-round, but "some ex-famous guy" of a "salesman-lobbyist-type" stopped it from being built because he was afraid of clowns. This likely refers to Spamton and Jevil.
* There is unused recruit info in the game's code for Jevil, suggesting that he may have been intended to appear as a recruit if he was defeated in Chapter 1, but the idea was scrapped during development.
== References ==
fr:Jevil
pt-br:Jevil
ru:Джевил
vi:Jevil
zh:Jevil
Category:Bonus Boss Enemies