Mega Evolution

In any battle, each Trainer may Mega Evolve a single Pokémon once. Mega Evolution is essentially a free action a Pokémon may make in addition to its normal move, but if a Pokémon will not use a move, it cannot Mega Evolve. Mega Evolution occurs before most actions except switching. A Mega-Evolved Pokémon will only revert to its original state if it faints or the battle ends; if it is switched out, it will remain Mega Evolved.

A Pokémon cannot Mega Evolve if it is being held in the airborne phase of Sky Drop. Neither volatile nor non-volatile status conditions such as paralysis, sleep, and infatuation will have any effect over a Pokémon's ability to Mega Evolve, even if they result in the Pokémon not being able to move that turn.

Mega Stones are not affected by most moves or Abilities. If they would move a Mega Stone to or from a Pokémon that could use it to Mega Evolve, the moves Bestow, Covet, Fling, Thief, Trick, and Switcheroo will fail and the Abilities Magician, Pickpocket and Symbiosis will not activate. The move Knock Off cannot remove a Mega Stone from a Pokémon that can use it to Mega Evolve, and Knock Off's power will not be increased since it cannot remove the item. The moves Embargo and Magic Room and the Ability Klutz will not prevent a Pokémon from using its respective Mega Stone to Mega Evolve.

Changes in a Pokémon's Ability will take place immediately. A Sharpedo that normally has Speed Boost will not gain a boost in Speed at the end of the turn it Mega Evolves, but if it uses a biting move such as Crunch that turn, it will be boosted by Strong Jaw, its Ability as Mega Sharpedo.

A transformed Pokémon (either by Transform or Imposter) is unable to Mega Evolve. It will fail to Mega Evolve even if it is transformed into the correct species and it is holding the respective Mega Stone. However, it is possible to transform into a Mega-Evolved Pokémon by copying another Mega-Evolved Pokémon. This has no effect on the restriction that only allows each player one Mega Evolution per battle.

In Generation VI, performing Mega Evolution will not alter the turn order. A Pokémon with a lower Speed than their opponent will still go after them on the one turn the Mega Evolution occurs, even if their Mega Evolution increases Speed and would otherwise cause them to go first. The opposite is also true for Pokémon who lose Speed from Mega Evolution, such as Garchomp. However, turn order will be determined normally on every turn afterwards.

Otherwise, stat changes and type changes due to Mega Evolution take effect immediately and damage calculation proceeds as usual. For example, a Pokémon whose Mega Evolution has a lower base Defense stat takes greater damage from physical moves on the turn it Mega Evolves. Likewise, the move Gyro Ball considers the Pokémon's Speed stat after Mega Evolution for damage calculation, not before.

Likewise, even if a Pokémon only has an Ability such as Prankster before Mega Evolution, appropriate moves will gain priority. If a Pokémon gains Prankster upon Mega Evolution, appropriate moves will not gain priority.

When the player Mega Evolves a Pokémon for the first time since the save file is accessed, a longer animation than usual will play, showing the player activating the Mega Evolution with his or her Mega Bracelet. On subsequent uses of Mega Evolution, a shorter animation will play, showing only the Pokémon as it Mega Evolves.

In Generation VII, a Pokémon's Speed after Mega Evolution is used to determine turn order, not its Speed before. Likewise, if a Pokémon only has an Ability such as Prankster before Mega Evolution, appropriate moves will not gain priority. If a Pokémon gains Prankster upon Mega Evolution, appropriate moves will gain priority.

Rayquaza cannot Mega Evolve if it holds a Z-Crystal.

In Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!, as the Held item mechanic is not implemented, the player simply needs to have the compatible Mega Stone in their bag to access a Pokémon's Mega Evolution. The player can also manually pick which form Charizard or Mewtwo can become from the move menu.

A Gardevoir Mega Evolving in a Contest Spectacular

In Pokémon Omega Ruby and Alpha Sapphire, Mega Evolution can also occur during the Talent Round of Pokémon Contest Spectaculars. If the participating Pokémon is holding its corresponding Mega Stone when its appeal causes the audience's excitement to reach its peak, it will Mega Evolve and perform a Spectacular Talent. The Pokémon will remain Mega Evolved for the remainder of the Talent Round.

In Pokémon Omega Ruby and Alpha Sapphire, when summoned by the Eon Flute, Latios^OR or Latias^AS will Mega Evolve before the player mounts it to soar in the sky. It will Mega Evolve even if it is not holding its corresponding Mega Stone, since the Eon Pokémon is summoned even if it is no longer in the player's game.

Main article: Mega Evolution (GO)

Mega Evolution was introduced in Pokémon GO on August 27, 2020. Rather than using a Mega Stone, an eligible Pokémon instead consumes Mega Energies to undergo a temporary Mega Evolution.

Metagross Mega Evolving in Pokémon Masters EX

Certain sync pairs, including some Trainers that do not have Key Stones in the core series, Mega Evolve their Pokémon while performing their sync move. After Mega Evolving, their sync partner will benefit from multipliers applied to all stats, chosen so that their total sum is 6.4, and sometimes different moves and passive skills for the rest of the battle. The following sync pairs can Mega Evolve:

Trainer	Normal form	Mega Evolution	Stats multipliers
			HP	Attack	Defense	Sp. Atk	Sp. Def	Speed
Agatha	Gengar ♀	Mega Gengar ♀	1	1	1	1.2	1.1	1.1
Bugsy	Beedrill ♂	Mega Beedrill ♂	1	1.2	1	1	1	1.2
Karen	Houndoom ♀	Mega Houndoom ♀	1	1	1.1	1.1	1	1.2
Noland	Pinsir ♂	Mega Pinsir ♂	1	1.2	1.2	1	1	1
Blue	Pidgeot ♂	Mega Pidgeot ♂	1	1	1	1.2	1	1.2
Sygna Suit Blue	Blastoise ♂	Mega Blastoise ♂	1	1	1.2	1	1.2	1
Blue (Classic)	Aerodactyl ♂	Mega Aerodactyl ♂	1	1.2	1	1.2	1	1
Hilda (Special Costume)	Diancie	Mega Diancie	1	1.2	1	1	1	1.2
Caitlin (Fall 2021)	Sableye ♀	Mega Sableye ♀	1	1	1.2	1	1.2	1
Glacia	Glalie ♂	Mega Glalie ♂	1	1	1	1.2	1	1.2
Cynthia	Garchomp ♀	Mega Garchomp ♀	1	1.2	1.2	1	1	1
Steven	Metagross	Mega Metagross	1	1.2	1.1	1	1.1	1
Steven (Anniversary 2021)	Rayquaza	Mega Rayquaza	1	1	1	1	1	1.4
Sygna Suit Red	Charizard ♂	Mega Charizard X ♂	1	1.2	1	1.2	1	1
Sabrina	Alakazam ♂	Mega Alakazam ♂	1	1	1	1.2	1	1.2
Wally	Gallade ♂	Mega Gallade ♂	1	1.2	1	1.2	1	1
Sygna Suit Leaf	Venusaur ♀	Mega Venusaur ♀	1	1	1	1.2	1.2	1
Sygna Suit Grimsley	Sharpedo ♂	Mega Sharpedo ♂	1	1.1	1	1	1	1.3
Jasmine	Steelix ♀	Mega Steelix ♀	1	1.2	1.2	1	1	1
Morty (Fall 2021)	Banette ♂	Mega Banette ♂	1	1.2	1	1	1	1.2
Lisia	Altaria ♂	Mega Altaria ♂	1	1	1	1.2	1.2	1
May	Swampert ♀	Mega Swampert ♀	1	1	1.2	1.2	1	1
May (Spring 2021)	Lopunny ♀	Mega Lopunny ♀	1	1.2	1	1	1	1.2
Diantha	Gardevoir ♀	Mega Gardevoir ♀	1	1	1	1.2	1.2	1
Sidney	Absol ♂	Mega Absol ♂	1	1.2	1	1	1	1.2
Giovanni*	Mewtwo	Mega Mewtwo Y	1	1	1	1.2	1	1.2

Although Zinnia and Brendan hold a Key Stone each, their respective sync partners Rayquaza and Sceptile do not Mega Evolve with their respective sync moves.

Once a player purchases a Mega Pencil from Professor Tetra for 500 Picrites, puzzles for Mega Evolutions can be solved. Furthermore, murals can be solved one tile at a time to display Groudon and Kyogre's Primal Reversions.

Only one Mega Evolution can be set at one time, and they cannot be brought alongside their normal forms. Their skills are higher ranked than their normal counterpart, and they can be used on larger puzzles.

The player gains the ability to Mega Evolve their Pokémon after completing the challenge "Raid of the Mighty General", then receiving the Special Stone Shop and a Mega Key from the rewards section of the ordinary shop. Mega Stones for currently owned Pokémon can be bought and immediately attached to its corresponding Pokémon using the Special Stone Shop. The first Mega Stone of the player's choice is free (unless either the Red or Blue Orb is chosen instead) and every one after it costs 5 Poké Diamonds. During battle, Mega Evolution can performed by tapping the Mega Evolution button using a Pokémon equipped with a Mega Stone in battle. Mega Evolution can be used again on any Pokémon in the same battle, unlike in the main games.

Mega-Evolved Pokémon revert after a completed trip, or when they are defeated or switched out. Mega Evolving will send out a shockwave that damages enemy Pokémon. This shockwave is capable of defeating and tipping over opposing Pokémon. Additionally, it also resets any negative status conditions or status changes the Pokémon had before Mega Evolving.

Main article: List of Pokémon by Pokémon Shuffle list number → Mega Evolution

Before a Pokémon's Mega Evolution can be used in Pokémon Shuffle, its respective Mega Stone must be obtained (or in Rayquaza's case, the Meteorite), typically either by defeating its Mega-Evolved form in a Trainer battle at the end of each Main Stage Area or as a prize for completing a Competitive Stage or reaching a certain point in an Escalation Battle.

The Pokémon placed in the first position (furthest to the left) when selecting Support Pokémon will Mega Evolve after the player fills the Mega Gauge by matching the Pokémon being Mega Evolved or matching Pokémon with the Mega Boost(+) Skills who are of the same type as the Pokémon being Mega Evolved. The size of the Mega Gauge depends on the Pokémon being Mega Evolved, with each Pokémon requiring different numbers of icons to be matched to fill its gauge. The Mega Effects for each Mega form vary between Pokémon, replacing the Pokémon's Skill for the remainder of the battle.

Mega Evolution in Pokémon Super Mystery Dungeon

Mega Alakazam in Berserk mode

Mega Evolution allows Pokémon to become more powerful, attack multiple enemies, and break down walls. To achieve Mega Evolution, the player must find an Awakening Emera in a Dungeon. These Emeras can be attached to a Looplet of a Pokémon that can Mega Evolve, causing it to Mega Evolve immediately. A Looplet attached with an Awakening emera will have a rainbow glow . Should it be given to Mewtwo or Charizard, their Mega Evolution will be chosen randomly.

A bar will appear above the Mega-Evolved Pokémon after it transforms and will slowly start to fill up. As long as the bar is present, the Mega-Evolved Pokémon will keep their form even when moving to the next floor. Once the bar is filled, the Mega-Evolved Pokémon will go into Berserk mode. In Berserk mode, the Pokémon will move around and use a powerful attack on any Pokémon surrounding it, friend and foe alike. This will go away after a while, and the Pokémon will revert to normal. When Mega Evolved, its regular attack will get a huge boost in power and range, destroy walls, and reveal purple sparkling spots on the floor which can be picked up for an item.

Attaching an Awakening Emera to a Pokémon that cannot Mega Evolve increases its stats by a lot and give it different boosts. Pokémon that cannot Mega Evolve with an Awakening Emera attached will not go into Berserk mode.

Awakening Emeras are hard to find and appear randomly in dungeons; like other Emeras, they will disappear if they are not reached in time.

Mega Evolution returns in Pokémon Mystery Dungeon: Rescue Team DX, here achieved by eating an Awakening Seed. Mega Evolved Pokemon also have all of the bonuses granted by the Awakened status (linked moves always result in critical hits, moves will never miss, and moves will ignore unfavorable type matchups). The only additional bonuses Mega Evolution grants compared to the Awakened status is the potential to change a Pokémon's type and ability.

As in Pokémon Super Mystery Dungeon, if Mewtwo or Charizard Mega Evolves, their Mega Evolution will be chosen randomly.

Additionally, during Rayquaza's rematch or Mewtwo's boss fight, both will Mega Evolve once their health drops below one half of their total. Mewtwo will always Mega Evolve into Mega Mewtwo X during its boss fight.

Lucario, Garchomp, Gardevoir, Gengar, Charizard, Blaziken, Sceptile, Scizor, Blastoise, Mewtwo, and Shadow Mewtwo are able to Mega Evolve through Synergy Burst, with Charizard and both of the Mewtwo Mega Evolving into their X forms. Mega Evolution can be triggered whenever a Pokémon capable of it has its Synergy Gauge filled up to the max during a battle. The Mega Evolved Pokémon will revert to its regular form once it has used up all of its Synergy power.

In addition, every time when Shadow Mewtwo is fought against in the game's story mode, it will Mega Evolve before the battle begins and stay in this state for the entire fight.

On the Dragon's Nest battle stage, Mega Rayquaza appears in the form of both an enormous statue alongside the battle arena and a drawing on the ground of the battle arena. On the Old Ferrum Town (Winter) battle stage, Mega Swampert appears in the form of a giant snow sculpture. Mega Rayquaza itself is also a Support Pokémon available as part of the Pokkén Tournament DX Battle Pack.

Charizard as Mega Charizard X in Super Smash Bros. for Wii U

Charizard and Lucario's Final Smashes are both Mega Evolution, which transforms them into Mega Charizard X and Mega Lucario, respectively. This Mega Evolution acts as a temporary power-up for the duration of the Final Smash.

Mewtwo's Final Smash is Psystrike, which has it Mega Evolve into Mega Mewtwo Y then use Psystrike.

Mega Venusaur and Mega Blastoise appear as trophies in Super Smash Bros. for Nintendo 3DS. Mega Blastoise, Mega Blaziken, Mega Kangaskhan, Mega Venusaur, Mega Lucario, Mega Mewtwo X, Mega Mewtwo Y, and Mega Charizard X appear as trophies in Super Smash Bros. for Wii U.

Mewtwo retains its Final Smash Psystrike from Super Smash Bros. for Nintendo 3DS/Wii U, which still causes it to Mega Evolve into Mega Mewtwo Y.

Lucario's Final Smash, Aura Storm, has it Mega Evolve into Mega Lucario in order to use it.

Mega Charizard X, Mega Kangaskhan, Mega Mewtwo Y, Mega Lucario, and Mega Diancie appear as Spirits.

Multiple Mega Evolutions have been featured in the anime:

• The first Mega Evolution in the anime was featured in Mewtwo — Prologue to Awakening, where Mewtwo was shown to be capable of changing between its regular form and Mega Mewtwo Y, in which its speed was dramatically boosted, being capable of moving faster than the blink of an eye. The same Mewtwo also played a major role in Genesect and the Legend Awakened, once again demonstrating its Mega Evolution capabilities. Unlike in the games, this Mewtwo seemed to be capable of Mega Evolving without the use of a Mega Stone. However, because the concept of Mega Evolution had not been announced at the time of the movie's release, this transformation remains unnamed in the movie. Some Japanese promotional material for the movie as well as its manga adaptation referred to it as Mewtwo's Awakened Form (覚醒した姿).[1]
• The first Mega Evolution in the main series was featured in Kalos, Where Dreams and Adventures Begin!, where Ash saw a Mega Blaziken. In the next episode, it was revealed to belong to a masked hero called the Blaziken Mask, saving Ash from a free fall from the Prism Tower. It has since been seen helping Ash and his friends on numerous occasions.
• A Mega Ampharos and a Mega Charizard X appeared as silhouettes in Lumiose City Pursuit! while Professor Sycamore told Ash, Clemont, and Bonnie about the concept of Mega Evolution.
• In Mega Evolution Special I, a Trainer named Alain was featured traveling across the Kalos region with his Mega Charizard X, challenging other Mega Evolution Trainers. During the episode, Alain battled Astrid's Mega Absol and Remo's Mega Garchomp, and was victorious in both battles. Later in the special, he even faced the Elite Four member Siebold and his Mega Blastoise, but the powerful Water-type Pokémon proved to be too much for Charizard, causing Alain to lose the battle.
• All known Mega Evolutions released at the time were also featured during the intro of the aforementioned special episode.
• Diantha's Mega Gardevoir first appeared in The Bonds of Evolution!, using its Mega Evolution powers to break free from Team Rocket's binds.
• Korrina has a Lucario that can Mega Evolve, and so does her grandfather Gurkinn, as shown in The Aura Storm!. In Origins of Mega Evolution!, it was shown in a flashback how one of Gurkinn's ancestors discovered a Key Stone, while his Lucario discovered a Lucarionite, leading to the first known Mega Evolution.
• In Calling from Beyond the Aura!, Korrina told Ash and his friends about a Trainer she had once met who had used a Mega Ampharos.
• A Trainer named Mabel and her Mega Mawile appeared in The Bonds of Mega Evolution!.
• Diancie Mega Evolved in Diancie and the Cocoon of Destruction in order to protect the Allearth Forest from Yveltal and restore the Diamond Domain by creating a new Heart Diamond. At the end of the movie, it was shown that a diamond Diancie had created and given to Bonnie earlier caused it to Mega Evolve, acting as a Key Stone.
• During the intro of Diancie and the Cocoon of Destruction, Wikstrom is seen Mega Evolving his Scizor in a battle against Diantha and her Mega Gardevoir.
• Steven Stone's Shiny Mega Metagross appeared in Mega Evolution Special II, as well as Mega Rayquaza. Both reappeared in Mega Evolution Special III.
• The intro of the aforementioned special episode also featured all newly revealed Mega Evolutions.
• A Mega Sableye appeared in XY051 as part of Mairin's Mega Evolution Journal.
• At the end of Mega Evolution Special III, Alain was seen battling a Trainer with a Mega Tyranitar.
• Professor Sycamore's Garchomp achieved Mega Evolution for the first time and Mega Evolved into a Mega Garchomp in Garchomp's Mega Bond!.
• The Latios, Latias, and Shiny Rayquaza that Hoopa summoned in Hoopa and the Clash of Ages all Mega Evolved during the movie. Much like the Mewtwo from the sixteenth movie, they were able to Mega Evolve without a Key Stone or their respective Mega Stones.
• In Mega Evolution Special IV, Alain battled ten Mega-Evolved Pokémon and their Trainers in a row, including Mega Venusaur, Mega Alakazam, Mega Heracross, Mega Scizor, Mega Ampharos, Mega Aggron, and Mega Pinsir. The final Trainer of the row was the Elite Four member Malva, who used a Mega Houndoom. At the end of the episode, Alain was also seen battling a Trainer with a Mega Banette.
• A Mega Audino appeared in A Giga Battle with Mega Results!, under the ownership of a Nurse Joy.
• In A Real Icebreaker!, Wulfric Mega Evolved his Abomasnow into Mega Abomasnow to fight against Ash's Greninja during their Gym battle.
• A Mega Alakazam, Mega Glalie, Mega Pidgeot, Mega Steelix, Shiny Mega Gengar, Shiny Mega Gardevoir, and several other Mega-Evolved Pokémon appeared in Volcanion and the Mechanical Marvel. With the exception of Kimia's Shiny Mega Gardevoir, they were forcibly Mega Evolved by a special device known as Mega Wave, which was being used by Alva and his minions Levi and Cherie. A Mega Wave evolved Mega Heracross and Mega Pinsir were also loaned to Team Rocket.
• A Mega Charizard Y owned by Trevor appeared in A League of His Own! during his Lumiose Conference battle against Alain.
• A Mega Sceptile owned by Sawyer appeared in Valuable Experience for All! during his quarterfinal battle in Lumiose Conference against Tierno.
• Lysandre's Shiny Mega Gyarados debuted in Coming Apart at the Dreams!, where it battled Ash's Pokémon and Alain's Charizard. It managed to knock out four of Ash's Pokémon, but was finally defeated in Rocking Kalos Defenses!.
• A Mega Gyarados appeared in a fantasy in Big Sky, Small Fry!, where Lana joked about being able to catch one at Brooklet Hill.
• Brock's Steelix and Misty's Gyarados Mega Evolved into Mega Steelix and Mega Gyarados in When Regions Collide!, while battling Kiawe's Turtonator and Ash's Pikachu, respectively.
• Gozu's Aggron Mega Evolved into Mega Aggron in The Prism Between Light and Darkness! to battle Professor Kukui's Braviary and Faba's Alakazam and Hypno.
• Ilima's Kangaskhan Mega Evolved into Mega Kangaskhan in Battling Besties! to battle Guzma's Scizor.
• In An Adventure of Mega Proportions!, Gurkinn Mega Evolved his Alakazam to battle Ash and his Lucario as a test to get a Lucarionite.
• In A Battle of Mega Versus Max!, Ash Mega Evolved his Lucario for the first time.

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  Mega Venusaur
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  Mega Charizard X
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  Mega Charizard Y
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  Mega Blastoise
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  Mega Beedrill
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  Mega Pidgeot
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  Mega Alakazam
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  Mega Slowbro
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  Mega Gengar
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  Shiny Mega Gengar
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  Mega Kangaskhan
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  Mega Pinsir
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  Mega Gyarados
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  Shiny Mega Gyarados
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  Mega Aerodactyl
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  Mega Mewtwo X
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  Mega Mewtwo Y
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  Mega Ampharos
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  Mega Steelix
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  Mega Scizor
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  Mega Heracross
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  Mega Houndoom
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  Mega Tyranitar
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  Mega Sceptile
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  Mega Blaziken
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  Mega Swampert
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  Mega Gardevoir
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  Shiny Mega Gardevoir
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  Mega Sableye
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  Mega Mawile
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  Mega Aggron
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  Mega Medicham
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  Mega Manectric
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  Mega Sharpedo
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  Mega Camerupt
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  Mega Altaria
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  Mega Banette
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  Mega Absol
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  Mega Glalie
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  Mega Salamence
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  Mega Metagross
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  Shiny Mega Metagross
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  Mega Latios
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  Mega Latias
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  Mega Rayquaza
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  Shiny Mega Rayquaza
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  Mega Lopunny
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  Mega Garchomp
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  Mega Lucario
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  Mega Abomasnow
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  Mega Gallade
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  Mega Audino
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  Mega Diancie

Mega Charizard X in Pokémon Origins

Red's Charizard was shown Mega Evolving into Mega Charizard X in File 4: Charizard during Red's battle against Mewtwo, thanks to the Charizardite X and Key Stone given to him by Mr. Fuji in an earlier episode. This situation was the first public appearance of Mega Charizard X and served as its official reveal.

All of the Mega Evolutions debuting in Omega Ruby and Alpha Sapphire were showcased in the Pokémon Omega Ruby and Pokémon Alpha Sapphire Animated Trailer.

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  Mega Beedrill
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  Mega Pidgeot
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  Mega Slowbro
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  Mega Steelix
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  Mega Sceptile
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  Mega Swampert
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  Mega Sableye
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  Mega Sharpedo
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  Mega Camerupt
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  Mega Altaria
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  Mega Glalie
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  Mega Salamence
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  Mega Metagross
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  Mega Latias
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  Mega Latios
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  Mega Lopunny
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  Mega Gallade
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  Mega Audino
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  Mega Diancie

Mega Rayquaza in Pokémon Generations

A Mega Rayquaza appeared in The Scoop, under the ownership of a Trainer, who used it to destroy a giant meteor. Afterwards, it battled against a Deoxys that had emerged from the destroyed meteor.

A Mega Gyarados appeared in The Visionary, under the ownership of Lysandre. He used it to battle Calem's Xerneas, but was quickly defeated.

A Mega Swampert and a Mega Salamence appeared in The Wish, belonging to May and Zinnia, respectively. In the same episode, May Mega Evolved Rayquaza after catching it.

In The Discovery, Green used a Mega Blastoise against Elaine's Mewtwo. Despite its best efforts, Blastoise was no match for the Genetic Pokémon's power.

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  Mega Blastoise
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  Mega Gyarados
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  Mega Swampert
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  Mega Salamence
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  Mega Rayquaza

In Pokémon - The Legend of the Dragon King, several main characters' Pokémon are capable of Mega Evolution, including Akira's Charizard, Koji's Garchomp, and Taichi's Ampharos.

X's team achieving multiple Mega Evolutions at once in Pokémon Adventures

At first, Mega Evolution was portrayed as a relatively unknown phenomenon, known only to Gurkinn and his Successors. Since then, it became apparent that Team Flare were also after the power of Mega Evolution, with one member even compiling a list of Mega Stones that they discovered. Simultaneous Mega Evolutions can also be accomplished by a Trainer, as long as they have a Key Stone for each Pokémon they are Mega Evolving. However, doing so will cause severe mental stress on the Trainer, and they will be unable to focus on anything other than a single target until the Mega Evolution is undone.

• When Team Flare members Aliana and Mable arrived in Vaniville Town in order to steal X's Mega Ring, the commotion caused X's baby Kangaskhan, Li'l Kanga, to react with X's Mega Ring and Mega Evolve into Mega Kangaskhan, easily defeating Aliana's Pyroar and Mable's Houndoom.
• When X and his friends were attacked by Team Flare in Santalune City, Korrina arrived and Mega Evolved her Lucario into Mega Lucario to assist them.
• In Lysandre Café, Diantha had her Gardevoir Mega Evolve into Mega Gardevoir to make Lysandre back off from attacking Trevor, Shauna, and Tierno.
• The Mega Evolutions of Aerodactyl, Aggron, Ampharos, Mawile and Garchomp made cameos when Gurkinn explained Mega Evolution to Essentia during her raid on the Tower of Mastery. In the subsequent round, Gurkinn Mega Evolved his Heracross.
• During Korrina's succession ceremony, three Successors demonstrated Mega Evolution to her by Mega Evolving their Medicham, Scizor and Alakazam respectively.
• While visiting Lumiose City, X met an Electrike, which led him to a Manectite, evolving into Manectric in the process. Later, Manectric joins X's team, Mega Evolving into Mega Manectric while facing a Team Flare Grunt.
• During a battle against Team Flare, Gurkinn's Gengar protected X from Celosia's Aegislash. It helped battle against Team Flare to stop them from capturing Xerneas while in tree form. It was later given it to X, at which point he nicknamed it Garma. Garma has a Gengarite, which allows X to Mega Evolve it into Mega Gengar.
• While confronting Essentia, X's Rute and Y's Solsol are given their respective Mega Stones, allowing them to Mega Evolve into Mega Pinsir and Mega Absol respectively.
• Both X's Salamè and Blue's Charizard Mega Evolved into Mega Charizard X and Mega Charizard Y respectively, after defeating Xerosic's Pokémon.
• After reuniting with Blaine, Mewtwo gained the ability to Mega Evolve into both Mega Mewtwo X and Y. Due to their bond, Mewtwo is able to Mega Evolve more than once per battle.

The role of Mega Evolution was diminished but its accessibility continued to be confined to a selected number of Trainers.

• In Omega Alpha Adventure 1, Ruby, Sapphire, and Emerald were shown learning how to Mega Evolve their Pokémon from Ultima. Sapphire and Emerald were seen mastering it in Omega Alpha Adventure 3, where they Mega Evolved their respective starter Pokémon.
• In Omega Alpha Adventure 2, Ruby was able to successfully Mega Evolve Latios into Mega Latios, allowing them to soar into the sky. He soon arrived at the Sky Pillar, where he met and battled Zinnia, who used her Mega Salamence against Mega Latios.
• In Omega Alpha Adventure 6, Steven Mega Evolved his Metagross into Mega Metagross with his Mega Stickpin.
• In Omega Alpha Adventure 7, Jinga of the Draconids Mega Evolved his Slowbro into Mega Slowbro in his battle against Ruby.
• In Omega Alpha Adventure 8, Ruby Mega Evolved Mumu into Mega Swampert.
• In Omega Alpha Adventure 11, Maxie and Archie used their Mega Glasses and Mega Anchor to Mega Evolve their Camerupt and Sharpedo into Mega Camerupt and Mega Sharpedo respectively. In retaliation, Red and Green Mega Evolved Saur and Blasty into Mega Venusaur and Mega Blastoise respectively to battle them.
• In Omega Alpha Adventure 15, footage of Rayquaza Mega Evolving was seen.
• In Omega Alpha Adventure 20, Giovanni Mega Evolved his Beedrill as part of his explanation that the meteoroid headed for Hoenn may be housing a Pokémon inside of it, since Mega Evolution is only supposed to work within a battle. Later, Sapphire and Ruby Mega Evolved Kirly and Rara into Mega Gallade and Mega Gardevoir respectively during a brief battle against each other.
• In Omega Alpha Adventure 21, Ruby and Sapphire Mega Evolved Rayquaza in order to have it destroy Grand Meteor Delta. Later, Ruby Mega Evolved Diancie for a Pokémon Contest Spectacular Performance.

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  Mega Venusaur
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  Mega Charizard Y
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  Mega Blastoise
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  Mega Swampert
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  Mega Gardevoir
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  Mega Blaziken
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  Mega Gallade
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  Mega Sceptile
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  Mega Kangaskhan
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  Mega Charizard X
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  Mega Manectric
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  Mega Gengar
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  Mega Pinsir
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  Mega Absol
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  Mega Beedrill
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  Mega Mewtwo X
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  Mega Mewtwo Y
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  Mega Lucario
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  Mega Metagross
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  Mega Sharpedo
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  Mega Camerupt
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  Mega Gyarados
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  Mega Salamence
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  Mega Heracross
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  Mega Medicham
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  Mega Alakazam
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  Mega Scizor
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  Mega Slowbro
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  Mega Latios
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  Mega Rayquaza
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  Mega Diancie
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  Mega Aerodactyl
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  Mega Ampharos
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  Mega Aggron
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  Mega Mawile
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  Mega Garchomp