Mechanics

Pokémon Reborn, for the most part, uses the same game mechanics as the Generation 7 Pokémon games— Pokémon Ultra Sun and Ultra Moon. There are, however, certain exceptions to this general rule, made to improve the playing experience and to fit Reborn's own gameplay.
==General Mechanics Changes==
* Hidden Abilities are just as common as regular abilities among wild and event Pokémon, and can be acquired through Ability Capsules.
* The base odds of encountering a shiny Pokémon are about 1/93.
* No Pokémon is shiny-locked.
* The odds of contracting Pokérus are 1/4096. Pokérus increases EV gain by a factor of 4.
* The EXP formula has been modified so that, for every level above 100 the opposing Pokémon are, they provide 8% more EXP than they would before. For example, a Level 105 opposing Pokémon provides 40% more EXP than it would before.
* Move Tutors charge for each of their moves only once.
* The table has been altered. The new one can be found here.
==Item Mechanics Changes==
* Repel stays active for 200 steps, Super Repel for 400 steps, and Max Repel for 500 steps.
* Eviolite additionally works as an Everstone.
* Light Ball additionally works as an Eviolite and an Everstone.
* Pikanium-Z additionally works as an Eviolite and an Everstone.
* Eevium-Z additionally works as an Everstone.
* Power Items reward 32 EVs in their respective stats and block any other EV gains from battle.
* Vitamins add 32 EVs to their respective stats and work even when the EVs in the respective stats are 100 or above.
* Feathers add 4 EVs to their respective stats.
* Macho Brace increases EV gain by a factor of 8.
* Exp. Share is a held item and works as it did before Generation 6.
* Exp. All is a key item. It works as the Exp. Share does in Generation 7, but does not grant EVs and will not grant EXP to Pokémon at or above the badge level cap.
* Exp. Candies do not raise the EXP of a Pokémon beyond the level cap, and will fail if used on a Pokémon already at or above the level cap.
==Move Mechanics Changes==
* HM moves (called TMX moves in Reborn) can be forgotten normally like other moves.
* no longer switches the user's place with its ally's in Doubles. Instead, it has -6 priority and switches the user with another Pokémon in the party in both Singles and Doubles, similar to how Teleport works in Gen 8.
* changes the target's typing to pure Grass instead of adding the Grass type to the target.
* changes the target's typing to pure Ghost instead of adding the Ghost type to the target.
* 's type no longer depends on a Pokémon's IVs and is no longer fixed. Its type can be changed by an NPC in Agate Circus.
* can be Fairy-type.
* If the user is Arceus and does not hold a Plate, 's type becomes the same as Arceus' current form's type, instead of always being Normal.
* If the user is Silvally and does not hold a Memory, 's type becomes the same as Silvally's current form's type, instead of always being Normal.
* has a base power of 120 (as in Gen 8), and can be ???-type.
* Pledge moves (i.e., , and ), when used by two allies on the same turn in a double battle, do not combine into one move and are executed independently like other moves.
* does not ignore secondary typings when dealing damage to non-grounded Flying-type Pokémon.
====Moves that create Fields in addition to their original effects====
* additionally creates an Inverse Field for three turns.
* additionally creates an Electric Terrain for three turns.
* additionally creates an Electric Terrain for three turns.
* additionally creates a Misty Terrain for three turns.
* additionally creates an Electric Terrain for three turns.
* additionally creates a Grassy Terrain for three turns in the absence of Forest Field and Flower Garden Field.
==Form Mechanics Changes==
* changes its cloak during battle instead of after battle. The cloak it changes into also depends on the Field that is currently active.
** It will change into its Plant Cloak in outdoor areas with no Field, as well as in Grassy Terrain, Misty Terrain, Burning Field, Swamp Field, Rainbow Field, Forest Field, Water Surface, Underwater, Fairy Tale Field, Flower Garden Field and Starlight Arena.
** It will change into its Sandy Cloak in alleyways with no Field, as well as in Dark Crystal Cavern, Desert Field, Icy Field, Rocky Field, Super-Heated Field, Ashen Beach, Cave, Crystal Cavern, Mountain, Snowy Mountain and Dragon's Den.
** It will change into its Trash Cloak in indoor areas with no Field, as well as in Electric Terrain, Chess Board, Big Top Arena, Corrosive Field, Corrosive Mist Field, Factory Field, Short-Circuit Field, Wasteland, Glitch Field, Murkwater Surface, Holy Field, Mirror Arena, New World, Inverse Field and Psychic Terrain.
* does not change into the Resolute Form upon learning Secret Sword, making this form unobtainable.
* can stay in the Pirouette Form outside of battle. It changes between its forms by using the move Relic Song outside of battle. Using the move inside battle does not change its form.
* and only have two sizes: Small Size and Super Size.
* can stay in the Complete Form outside of battle. Complete Form Zygarde is obtainable by the player through story events.
* has a ???-type form, which can be achieved on Glitch Field.
==Evolution Mechanics Changes==
* Pokémon that require leveling up to evolve can evolve mid-battle if their evolution requirements are met.
* Pokémon that require being traded to evolve, can also evolve if a Link Stone is used on them.
** If they require holding an item while being traded, they must hold that item when the Link Stone is used.
** In the case of Karrablast and Shelmet, the other Pokémon must be present in the party when the Link Stone is used on either of them.
* Pikachu evolves into Alolan Raichu when a Thunder Stone is used on it at Apophyll Beach (including Apophyll Cave and Pyrous Mountain), on Azurine Island or in Azurine Lake.
* Exeggcute evolves into Alolan Exeggutor when a Leaf Stone is used on it at Apophyll Beach (including Apophyll Cave and Pyrous Mountain).
* Cubone evolves into Alolan Marowak upon leveling up during nighttime or in Beryl Cemetery.
* Magneton evolves into Magnezone upon leveling up in Yureyu Power Plant.
* Nosepass evolves into Probopass upon leveling up in Yureyu Power Plant.
* Charjabug evolves into Vikavolt upon leveling up in Yureyu Power Plant.
* Crabrawler evolves into Crabominable upon leveling up in Ametrine Mountain, Celestinine Mountain or Ametrine City.
* Eevee evolves into Leafeon when a Leaf Stone is used on it or upon leveling up near the Moss Rock in Chrysolia Forest.
* Eevee evolves into Glaceon when an Ice Stone is used on it or upon leveling up near the Ice Rock in Celestinine Mountain B2F, near North Aventurine Woods.
* Eevee evolves into Sylveon upon leveling up if it has high friendship and knows a Fairy-type move.
* Rockruff evolves into Dusk Form Lycanroc upon leveling up starting from level 25 between 5 PM and 5:59 PM, regardless of its ability.
* Cosmoem evolves into Solgaleo upon leveling up starting from level 53 during daytime.
* Cosmoem evolves into Lunala upon leveling up starting from level 53 during nighttime.
* Inkay evolves into Malamar upon leveling up starting from level 30 if the player tries to cancel the evolution during the evolution scene.
==Pokémon Attribute Changes==
===Sprites===
* Most Pokémon have custom shiny forms.
* Shiny Pokémon have separate icons and thus will appear shiny in the nicknaming screen, the Pokémon menu, the storage system, etc.
* Eevee has gender differences (as in Gen 8).
* Eggs of all species have unique sprites and icons.
* Eggs also have separate sprites and icons for when they contain shiny Pokémon.
* Eggs have gender differences when the Pokémon they contain have gender differences.
===Abilities===
* Zygarde's 10% and 50% forms obtained by the player cannot acquire the ability Power Construct through any means.
===Learnsets===
* Pikachu learns Extreme Speed, Sing and Yawn at Level 1, and Fly and Surf via TM.
* Gengar learns Sludge Wave via TM.
* Dragonite learns Extreme Speed at Level 1.
* Raikou learns Zap Cannon, Weather Ball, Aura Sphere and Extreme Speed at Level 1.
* Entei learns Flare Blitz, Crush Claw, Howl and Extreme Speed at Level 1.
* Suicune learns Air Slash, Aqua Ring and Extreme Speed at Level 1.
* Rayquaza learns Dragon Ascent and V-create at Level 1.
* Jirachi learns Draco Meteor, Moonblast, Heart Stamp, Meteor Mash and Play Rough at Level 1.
* Deoxys (Normal Form) learns Meteor Mash, Nasty Plot, Detect and Zap Cannon at Level 1.
* Darkrai learns Phantom Force, Spacial Rend and Roar of Time at Level 1.
* Arceus learns Shadow Force, Roar of Time and Spacial Rend at Level 1.
* Victini learns V-create, Fusion Flare, Fusion Bolt, Bolt Strike, Blue Flare and Glaciate at Level 1.
* Keldeo learns Secret Sword at Level 1.
* Meloetta learns Relic Song at Level 1.
* Zygarde learns Dragon Dance, Extreme Speed, Thousand Waves and Thousand Arrows at Level 1, but does not learn Core Enforcer through any means.
* Silvally learns Fire Pledge and Water Pledge via Move Tutors.