How To Draw Pokemon Mega Steelix

From Bulbapedia, the community-driven Pokémon encyclopedia.

Mega redirects here. For Crystal's Meganium in Pokémon Adventures, which is known as Mega in Chuang Yi translations, see Megaree.

Blaziken Mega Evolving into Mega Blaziken

Mega Evolution (Japanese: メガシンカ Mega Evolution) is a temporary transformation introduced in Generation VI that affects certain Pokémon. Mega-Evolved Pokémon are identified by having "Mega" in front of their name. In the core series, Mega Evolution requires the player to hold a Key Stone and a Pokémon capable of Mega Evolution holding its compatible Mega Stone (except in Pokémon Let's Go, Pikachu! and Let's Go, Eevee!, in which the player simply needs to have the Mega Stone in their bag). While Mega Evolution is also available in the Generation VII games, including Pokémon Let's Go, Pikachu! and Let's Go, Eevee!, it has been removed from Pokémon Sword and Shield, due to the lack of Key Stones and Mega Stones. Although it still appears in some spinoffs like Pokémon Go, Pokémon Masters EX, and in the main series of the anime.

There are 46 species of Pokémon that are capable of Mega Evolution, and there are 48 different Mega Evolutions.

History

Korrina, the Gym Leader of Shalour City, is said to know secrets about Mega Evolution. The Tower of Mastery is also related to Mega Evolution. According to a Kalos legend, the first Pokémon to have been Mega Evolved was a Lucario. However, according to Zinnia's grandmother in Pokémon Omega Ruby and Alpha Sapphire, Rayquaza was the first Pokémon to Mega Evolve; Mega Evolution was first discovered by the first meeting of humanity and Rayquaza. Professor Sycamore theorizes that Mega Evolution can only be achieved if there is a strong bond between a Trainer and the Pokémon.

In the games

In order to Mega Evolve, most Pokémon must be holding their appropriate Mega Stone and the Trainer must have a Key Stone. Only Rayquaza does not need a Mega Stone to Mega Evolve; instead, it must know the move Dragon Ascent.

In battle

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.

Generation VI

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.

Generation VII

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.

Outside of battle

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.

Effects

A Mega-Evolved Pokémon has different base stats, with the exception of HP, and can have a different Ability and type from its non-Mega-Evolved form. Every Mega-Evolved Pokémon (except for Mega Alakazam in Generation VI) has a base stat total 100 points higher than that of its base form.

Pokémon capable of Mega Evolution

Introduced in X and Y

Pokémon	Before Mega Evolution			After Mega Evolution			Mega Stone
Pokémon	Image	Type	Ability	Image	Type	Ability	Mega Stone
Venusaur		Grass Poison	Overgrow Chlorophyll (Hidden)		Grass Poison	Thick Fat	Venusaurite
Charizard		Fire Flying	Blaze Solar Power (Hidden)		Fire Dragon	Tough Claws	Charizardite X
Charizard		Fire Flying	Blaze Solar Power (Hidden)		Fire Flying	Drought	Charizardite Y
Blastoise		Water	Torrent Rain Dish (Hidden)		Water	Mega Launcher	Blastoisinite
Alakazam		Psychic	Synchronize Inner Focus Magic Guard (Hidden)		Psychic	Trace	Alakazite
Gengar		Ghost Poison	Levitate (Generation VI) Cursed Body (Generation VII)		Ghost Poison	Shadow Tag	Gengarite
Kangaskhan		Normal	Early Bird Scrappy Inner Focus (Hidden)		Normal	Parental Bond	Kangaskhanite
Pinsir		Bug	Hyper Cutter Mold Breaker Moxie (Hidden)		Bug Flying	Aerilate	Pinsirite
Gyarados		Water Flying	Intimidate Moxie (Hidden)		Water Dark	Mold Breaker	Gyaradosite
Aerodactyl		Rock Flying	Rock Head Pressure Unnerve (Hidden)		Rock Flying	Tough Claws	Aerodactylite
Mewtwo		Psychic	Pressure Unnerve (Hidden)		Psychic Fighting	Steadfast	Mewtwonite X
Mewtwo		Psychic	Pressure Unnerve (Hidden)		Psychic	Insomnia	Mewtwonite Y
Ampharos		Electric	Static Plus (Hidden)		Electric Dragon	Mold Breaker	Ampharosite
Scizor		Bug Steel	Swarm Technician Light Metal (Hidden)		Bug Steel	Technician	Scizorite
Heracross		Bug Fighting	Swarm Guts Moxie (Hidden)		Bug Fighting	Skill Link	Heracronite
Houndoom		Dark Fire	Early Bird Flash Fire Unnerve (Hidden)		Dark Fire	Solar Power	Houndoominite
Tyranitar		Rock Dark	Sand Stream Unnerve (Hidden)		Rock Dark	Sand Stream	Tyranitarite
Blaziken		Fire Fighting	Blaze Speed Boost (Hidden)		Fire Fighting	Speed Boost	Blazikenite
Gardevoir		Psychic Fairy	Synchronize Trace Telepathy (Hidden)		Psychic Fairy	Pixilate	Gardevoirite
Mawile		Steel Fairy	Hyper Cutter Intimidate Sheer Force (Hidden)		Steel Fairy	Huge Power	Mawilite
Aggron		Steel Rock	Sturdy Rock Head Heavy Metal (Hidden)		Steel	Filter	Aggronite
Medicham		Fighting Psychic	Pure Power Telepathy (Hidden)		Fighting Psychic	Pure Power	Medichamite
Manectric		Electric	Static Lightning Rod Minus (Hidden)		Electric	Intimidate	Manectite
Banette		Ghost	Insomnia Frisk Cursed Body (Hidden)		Ghost	Prankster	Banettite
Absol		Dark	Pressure Super Luck Justified (Hidden)		Dark	Magic Bounce	Absolite
Latias*		Dragon Psychic	Levitate		Dragon Psychic	Levitate	Latiasite
Latios*		Dragon Psychic	Levitate		Dragon Psychic	Levitate	Latiosite
Garchomp		Dragon Ground	Sand Veil Rough Skin (Hidden)		Dragon Ground	Sand Force	Garchompite
Lucario		Fighting Steel	Steadfast Inner Focus Justified (Hidden)		Fighting Steel	Adaptability	Lucarionite
Abomasnow		Grass Ice	Snow Warning Soundproof (Hidden)		Grass Ice	Snow Warning	Abomasite

Introduced in Omega Ruby and Alpha Sapphire

Pokémon	Before Mega Evolution			After Mega Evolution			Mega Stone
Pokémon	Image	Type	Ability	Image	Type	Ability	Mega Stone
Beedrill		Bug Poison	Swarm Sniper (Hidden)		Bug Poison	Adaptability	Beedrillite
Pidgeot		Normal Flying	Keen Eye Tangled Feet Big Pecks (Hidden)		Normal Flying	No Guard	Pidgeotite
Slowbro		Water Psychic	Oblivious Own Tempo Regenerator (Hidden)		Water Psychic	Shell Armor	Slowbronite
Steelix		Steel Ground	Rock Head Sturdy Sheer Force (Hidden)		Steel Ground	Sand Force	Steelixite
Sceptile		Grass	Overgrow Unburden (Hidden)		Grass Dragon	Lightning Rod	Sceptilite
Swampert		Water Ground	Torrent Damp (Hidden)		Water Ground	Swift Swim	Swampertite
Sableye		Dark Ghost	Keen Eye Stall Prankster (Hidden)		Dark Ghost	Magic Bounce	Sablenite
Sharpedo		Water Dark	Rough Skin Speed Boost (Hidden)		Water Dark	Strong Jaw	Sharpedonite
Camerupt		Fire Ground	Magma Armor Solid Rock Anger Point (Hidden)		Fire Ground	Sheer Force	Cameruptite
Altaria		Dragon Flying	Natural Cure Cloud Nine (Hidden)		Dragon Fairy	Pixilate	Altarianite
Glalie		Ice	Inner Focus Ice Body Moody (Hidden)		Ice	Refrigerate	Glalitite
Salamence		Dragon Flying	Intimidate Moxie (Hidden)		Dragon Flying	Aerilate	Salamencite
Metagross		Steel Psychic	Clear Body Light Metal (Hidden)		Steel Psychic	Tough Claws	Metagrossite
Rayquaza		Dragon Flying	Air Lock		Dragon Flying	Delta Stream	None*
Lopunny		Normal	Cute Charm Klutz Limber (Hidden)		Normal Fighting	Scrappy	Lopunnite
Gallade		Psychic Fighting	Steadfast Justified (Hidden)		Psychic Fighting	Inner Focus	Galladite
Audino		Normal	Healer Regenerator Klutz (Hidden)		Normal Fairy	Healer	Audinite
Diancie		Rock Fairy	Clear Body		Rock Fairy	Magic Bounce	Diancite

In other games

Pokémon GO

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.

Pokémon Masters EX

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
Trainer	Normal form	Mega Evolution	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
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
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.

Pokémon Picross

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.

Pokémon Rumble World

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.

Pokémon Shuffle

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.

Pokémon Super Mystery Dungeon

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.

Pokémon Mystery Dungeon: Rescue Team DX

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.

Pokkén Tournament

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

Super Smash Bros. series

Super Smash Bros. for Nintendo 3DS/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.

Description

Games	Description
Super Smash Bros. for Nintendo 3DS/Wii U	Evolve into Mega Charizard X. Breathe fire with B.* Evolve into Mega Lucario. Aura power rises to max.*

Super Smash Bros. Ultimate

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.

In the anime

Mega Blaziken in the anime

Main series

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 JN084, Gurkinn Mega Evolved his Alakazam to battle Ash and his Lucario as a test to get a Lucarionite.
In JN086, Ash Mega Evolved his Lucario for the first time.

Gallery

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

Mega Charizard X in Pokémon Origins

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.

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.

Pokémon Evolutions

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

Pokémon Omega Ruby and Alpha Sapphire Animated Trailer

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.

Gallery

Mega Beedrill
Mega Pidgeot
Mega Slowbro
Mega Swampert
Mega Sableye
Mega Sharpedo
Mega Camerupt
Mega Altaria
Mega Glalie
Mega Salamence
Mega Metagross
Mega Lopunny
Mega Gallade

In the manga

Pokémon - The Legend of the Dragon King

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.

Pokémon Adventures

X & Y chapter

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.

Omega Ruby & Alpha Sapphire chapter

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.

Gallery

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

In the TCG

Mega Evolution is mainly featured in the Pokémon Trading Card Game as Pokémon. They were added as a new mechanic to the game in the XY era as an evolution of Pokémon-EX cards. Mega Evolving a Pokémon immediately ends a player's turn, unless that Pokémon has its specific Spirit Link Pokémon Tool attached to it.

The following is a list of cards mentioning or featuring Mega Evolved Pokémon in the Trading Card Game.

Mega Evolution Pokémon Cards listed with a blue background are only legal to use in the current Expanded format. Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
Card	Type	English Expansion	Rarity	#	Japanese Expansion	Rarity	#
Venusaur		XY		2/146	Collection X		002/060
		Evolutions		2/108	Expansion Pack 20th Anniversary		002/087
		Evolutions		100/108	Expansion Pack 20th Anniversary		089/087
Blastoise		XY		30/146	Collection Y		015/060
		Evolutions		22/108	Expansion Pack 20th Anniversary		022/087
		Evolutions		102/108	Expansion Pack 20th Anniversary		093/087
Charizard		Flashfire		13/106	M Charizard-EX Mega Battle Deck		002/021
		Flashfire		107/106	Wild Blaze		088/080
		Evolutions		13/108	Expansion Pack 20th Anniversary		013/087
		Evolutions		101/108	Expansion Pack 20th Anniversary		091/087
Charizard		Flashfire		69/106	Wild Blaze		055/080
Charizard		Flashfire		108/106	Wild Blaze		089/080
Kangaskhan		Flashfire		79/106	Wild Blaze		065/080
		Flashfire		109/106	Wild Blaze		090/080
					Premium Champion Pack		094/131
Heracross		Furious Fists		5/111	Rising Fist		005/096
Heracross		Furious Fists		112/111	Rising Fist		104/096
Lucario		Furious Fists		55/111	Rising Fist		053/096
		Furious Fists		113/111	Rising Fist		105/096
					Premium Champion Pack		075/131
					The Best of XY		063/171
		Miscellaneous Promotional cards		55a/111	The Best of XY		176/171
Manectric		Phantom Forces		24/119	Phantom Gate		024/088
		Phantom Forces		120/119	Phantom Gate		096/088
					Premium Champion Pack		043/131
					The Best of XY		035/171
		Miscellaneous Promotional cards		24a/119	The Best of XY		174/171
Gengar		Phantom Forces		35/119	Phantom Gate		034/088
		Phantom Forces		121/119	Phantom Gate		097/088
					Premium Champion Pack		049/131
Gengar		XY Black Star Promos		XY166	XY-P Promotional cards		079/XY-P
Metagross		XY Black Star Promos		XY35	XY-P Promotional cards		102/XY-P
Diancie		XY Black Star Promos		XY44	XY-P Promotional cards		093/XY-P
Aggron		Primal Clash		94/160	Gaia Volcano		046/070
Aggron		Primal Clash		154/160	Gaia Volcano		076/070
Gardevoir		Primal Clash		106/160	Tidal Storm		051/070
		Primal Clash		156/160	Tidal Storm		076/070
		Generations		RC31/RC32	PokéKyun Collection		020/032
Gallade		Roaring Skies		35/108	Emerald Break		031/078
Gallade		Roaring Skies		100/108	Emerald Break		081/078
Latios		Roaring Skies		59/108	Emerald Break		049/078
Latios		Roaring Skies		102/108	Emerald Break		083/078
Rayquaza		Roaring Skies		61/108	M Rayquaza-EX Mega Battle Deck		006/018
Rayquaza		Roaring Skies		76/108	Emerald Break		062/078
		Roaring Skies		105/108	Emerald Break		086/078
					Premium Champion Pack		097/131
					XY-P Promotional cards		272/XY-P
					The Best of XY		105/171
Absol		XY Black Star Promos		XY63	XY-P Promotional cards		XY-P
Blaziken		XY Black Star Promos		XY86	XY-P Promotional cards		138/XY-P
Swampert		XY Black Star Promos		XY87	XY-P Promotional cards		XY-P
Sceptile		Ancient Origins		8/98	Bandit Ring		008/081
		Ancient Origins		85/98	Bandit Ring		083/081
					Premium Champion Pack		007/131
					The Best of XY		007/171
Ampharos		Ancient Origins		28/98	Bandit Ring		028/081
Ampharos		Ancient Origins		88/98	Bandit Ring		086/081
Tyranitar		Ancient Origins		43/98	Bandit Ring		043/081
Tyranitar		Ancient Origins		92/98	Bandit Ring		090/081
Rayquaza		Ancient Origins		98/98	Bandit Ring		095/081
Houndoom		BREAKthrough		22/162	Red Flash		010/059
Houndoom		BREAKthrough		154/162	Red Flash		061/059
Glalie		BREAKthrough		35/162	Blue Shock		015/059
Glalie		BREAKthrough		156/162	Blue Shock		061/059
Mewtwo		BREAKthrough		63/162	Blue Shock		026/059
		BREAKthrough		159/162	Blue Shock		063/059
					Premium Champion Pack		051/131
Mewtwo		BREAKthrough		64/162	Red Flash		026/059
		BREAKthrough		160/162	Red Flash		063/059
					Premium Champion Pack		052/131
					The Best of XY		043/171
Aerodactyl		XY Black Star Promos		XY98	XY-P Promotional cards		183/XY-P
Mawile		XY Black Star Promos		XY104	XY-P Promotional cards		186/XY-P
Gyarados		BREAKpoint		27/122	Rage of the Broken Heavens		019/080
Gyarados		BREAKpoint		115/122	Rage of the Broken Heavens		082/080
Scizor		BREAKpoint		77/122	Rage of the Broken Heavens		058/080
Scizor		BREAKpoint		120/122	Rage of the Broken Heavens		087/080
Venusaur		Generations		2/83	BREAK Starter Pack		002/072
Charizard		Generations		12/83	BREAK Starter Pack		011/072
Blastoise		Generations		18/83	BREAK Starter Pack		074/072
Alakazam		Fates Collide		26/124	Awakening Psychic King		024/078
		Fates Collide		118/124	Awakening Psychic King		081/078
					The Best of XY		041/171
Altaria		Fates Collide		69/124	Awakening Psychic King		054/078
Altaria		Fates Collide		121/124	Awakening Psychic King		084/078
Audino		Fates Collide		85/124	M Audino-EX Mega Battle Deck		012/026
Beedrill		XY Black Star Promos		XY158	Premium Champion Pack		002/131
Garchomp		XY Black Star Promos		XY168	XY-P Promotional cards		XY-P
Steelix		Steam Siege		68/114	Fever-Burst Fighter		033/054
Steelix		Steam Siege		109/114	Fever-Burst Fighter		057/054
Gardevoir		Steam Siege		79/114	Cruel Traitor		039/054
		Steam Siege		112/114	Cruel Traitor		057/054
					The Best of XY		092/171
Salamence		XY Black Star Promos		XY171	XY-P Promotional cards		257/XY-P
Slowbro		Evolutions		27/108	XY-P Promotional cards		263/XY-P
Pidgeot		Evolutions		65/108	Expansion Pack 20th Anniversary		063/087
Pidgeot		Evolutions		105/108	Expansion Pack 20th Anniversary		097/087
Camerupt		XY Black Star Promos		XY198	The Best of XY		013/171
Camerupt		Miscellaneous Promotional cards		XY198a	The Best of XY		172/171
Sharpedo		XY Black Star Promos		XY200	The Best of XY		071/171
Sharpedo		Miscellaneous Promotional cards		XY200a	The Best of XY		178/171
Mega Sableye & Tyranitar		Unified Minds		126/236	Miracle Twin		054/094
		Unified Minds		225/236	Miracle Twin		101/094
		Unified Minds		226/236	Miracle Twin		102/094
		Unified Minds		245/236	Miracle Twin		111/094
Mega Lopunny & Jigglypuff		Cosmic Eclipse		165/236	Alter Genesis		073/095
		Cosmic Eclipse		225/236	Alter Genesis		103/095
		Cosmic Eclipse		226/236	Alter Genesis		104/095
		Cosmic Eclipse		261/236	Alter Genesis		114/095
Other related cards
Card	Type	English Expansion	Rarity	#	Japanese Expansion	Rarity	#
Gengar Spirit Link	I	Phantom Forces		95/119	XY-P Promotional cards		055/XY-P
Gengar Spirit Link	I				Premium Champion Pack		111/131
Manectric Spirit Link	I	Phantom Forces		100/119	Phantom Gate		081/088
					Premium Champion Pack		115/131
					The Best of XY		134/171
Aggron Spirit Link	I	Primal Clash		123/160	Gaia Volcano		065/070
Gardevoir Spirit Link	I	Primal Clash		130/160	Tidal Storm		065/070
		Steam Siege		101/114	Cruel Traitor		052/054
					The Best of XY		128/171
Gallade Spirit Link	I	Roaring Skies		183/108	Emerald Break		073/078
Latios Spirit Link	I	Roaring Skies		85/108	Emerald Break		074/078
Rayquaza Spirit Link	I	Roaring Skies		87/108	M Rayquaza-EX Mega Battle Deck		012/018
					XY-P Promotional cards		126/XY-P
					Premium Champion Pack		116/131
					The Best of XY		136/171
Ampharos Spirit Link	I	Ancient Origins		70/98	Bandit Ring		074/081
					Premium Champion Pack		115/131
					The Best of XY		134/171
Sceptile Spirit Link	I	Ancient Origins		80/98	Bandit Ring		073/081
					Premium Champion Pack		112/131
					The Best of XY		130/171
Tyranitar Spirit Link	I	Ancient Origins		81/98	Bandit Ring		075/081
Glalie Spirit Link	I	BREAKthrough		139/162	Blue Shock		055/059
Houndoom Spirit Link	I	BREAKthrough		142/162	Red Flash		056/059
Mewtwo Spirit Link	I	BREAKthrough		144/162	Blue Shock		056/059
					Red Flash		057/059
					Premium Champion Pack		114/131
					The Best of XY		133/171
Gyarados Spirit Link	I	BREAKpoint		101/122	Rage of the Broken Heavens		075/080
Scizor Spirit Link	I	BREAKpoint		111/122	Rage of the Broken Heavens		076/080
Aerodactyl Spirit Link	I	XY Black Star Promos		XY99	XY-P Promotional cards		188/XY-P
Mawile Spirit Link	I	XY Black Star Promos		XY105	XY-P Promotional cards		187/XY-P
Alakazam Spirit Link	I	Fates Collide		90/124	Awakening Psychic King		075/078
					XY-P Promotional cards		229/XY-P
					The Best of XY		132/171
Altaria Spirit Link	I	Fates Collide		91/124	Awakening Psychic King		074/078
Audino Spirit Link	I	Fates Collide		92/124	M Audino-EX Mega Battle Deck		019/026
Steelix Spirit Link	I	Steam Siege		106/114	Fever-Burst Fighter		052/054
Beedrill Spirit Link	I	XY Black Star Promos		XY159	Premium Champion Pack		113/131
Blastoise Spirit Link	I	Evolutions		73/108	Expansion Pack 20th Anniversary		080/087
Charizard Spirit Link	I	Evolutions		75/108	Expansion Pack 20th Anniversary		083/087
Pidgeot Spirit Link	I	Evolutions		81/108	Expansion Pack 20th Anniversary		081/087
Slowbro Spirit Link	I	Evolutions		86/108	XY-P Promotional cards		265/XY-P
Venusaur Spirit Link	I	Evolutions		89/108	Expansion Pack 20th Anniversary		082/087
Garchomp Spirit Link	I	XY Black Star Promos		XY169	Premium Champion Pack
Salamence Spirit Link	I	XY Black Star Promos		XY172	XY-P Promotional cards		258/XY-P
Camerupt Spirit Link	I	XY Black Star Promos		XY199	The Best of XY		131/171
Sharpedo Spirit Link	I	XY Black Star Promos		XY201	The Best of XY		129/171
Lucario Spirit Link	I	XY Black Star Promos		XY211	The Best of XY		135/171

Trivia

According to Ken Sugimori in his interview in the Nintendo Dream magazine, Flygon was intended to get a Mega Evolution in Pokémon X and Y, but the idea was later dropped due to him experiencing an artist's block.
There is at least one Mega Evolved Pokémon of every type: Psychic has the most (with ten), while both Ice and Electric have the fewest (with two each).
- Electric is the only type for which no new Mega Evolution was introduced in Pokémon Omega Ruby and Alpha Sapphire.
Gardevoir and Gallade are the only Pokémon capable of Mega Evolution that are in the same evolutionary family.
Only Pokémon which cannot evolve further are capable of Mega Evolution.
- Aerodactyl is the only Fossil Pokémon capable of Mega Evolution.
- Rayquaza is the only trio master capable of Mega Evolution.
- Diancie is the only Mythical Pokémon capable of Mega Evolution.
With base stat totals of 780, Mega Mewtwo X, Mega Mewtwo Y, and Mega Rayquaza have the highest base stat totals of any obtainable Pokémon. Eternamax Eternatus has the highest base stat total of all Pokémon at 1125, but cannot be used by the player.
- In addition, Mega Mewtwo Y has the highest base Special Attack of all Pokémon at 194, and Mega Mewtwo X has the highest base Attack of all Pokémon at 190. Mega Mewtwo X also has the highest base stat increase of all Mega Evolutions, its Attack stat being boosted by 80 upon the process.
Aggron is the only dual-type Pokémon to become single-type upon Mega Evolving, going from Steel/Rock-type to pure Steel-type.
The only Pokémon with multiple Mega Evolutions are Charizard and Mewtwo, which have two each and were introduced in Generation I. In both cases, the first ones to be revealed were the Y versions.
- In addition, both of their Y Mega Evolutions kept their original type(s), while both of their X Mega Evolutions changed or added their secondary type.
- Also, in both cases, the X Mega Evolution is more physically-oriented (with a higher Attack and/or Defense), while the Y Mega Evolution is more specially-oriented (with a higher Special Attack and/or Special Defense).
Rayquaza is the only Pokémon that does not require a Mega Stone to Mega Evolve in the core series games, instead being required to know Dragon Ascent.
- This makes Rayquaza the only Pokémon that can have a different held item while Mega Evolved, since Mega Stones cannot be taken off their proper holder during battle.
- It is, furthermore, the only Pokémon to lack the message "(The opposing) <Pokémon>'s <Mega Stone> is reacting to its Key Stone!" when it Mega Evolves, as it has the message "<player>'s fervent wish has reached Rayquaza!" instead.
- In Pokémon Shuffle, Rayquaza needs the player to get the Meteorite for it to Mega Evolve.
- Although Rayquaza can learn Dragon Ascent in Pokémon Sword and Shield, its Mega Evolution has been removed from the games.
Mega Latias and Mega Latios are programmed into Pokémon X and Y; as a result, they are not banned by the Kalos rules from battles, and their Mega Stones are not banned from trades between Omega Ruby or Alpha Sapphire and X or Y, despite being otherwise unavailable in those games.
The Japanese and Korean logos for Pokémon X and Y include the Mega Evolution sigil.
In the Pokémon X and Y demo, the message "An immense new power has risen in Mewtwo!" would be displayed before Mega Evolving. In the final game, the message displayed is "<Pokémon>'s <Mega Stone> is reacting to <Trainer>'s <Key Stone item>!" Additionally, Mega Mewtwo Y is referred to as simply Mega Mewtwo.
Slowbro is the only Pokémon to have both a Mega Evolution and a regional form.
The fully evolved Kanto starter Pokémon and Gengar are the only Pokémon that can both Mega Evolve and Gigantamax.

In other languages

Language		Title
Albanian		Mega Evolucion
Chinese	Cantonese	超級進化 Chīukāp Jeunfa * 超進化 Chīu Jeunfa *
Chinese	Mandarin	超級進化 / 超级进化 Chāojí Jìnhuà * 超進化 / 超进化 Chāo Jìnhuà *
Czech		Mega evoluce
Danish		Megaudvikling Mega Udvikling
Dutch		Mega Evolutie (Pokémon Ultra Sun and Ultra Moon website, XY002-XY034) Mega-evolutie (XY043-present)
Finnish		Megakehitys (anime) Megaevoluutio (TCGO)
French		Méga-Évolution
German		Mega-Entwicklung
Greek		Μέγα Εξέλιξη Méga Exélixi
Hebrew		מגה התפתחות Mega Hitpatkhut
Hindi		Mega Evolution
Hungarian		Mega evolúció Mega Fejlődés
Indonesian		Evolusi Mega Mega Evolusi
Italian		Megaevoluzione
Korean		메가진화 Mega Jinhwa
Malaysian		Evolusi Mega
Norwegian		Megautvikling Megaevolusjon
Polish		Megaewolucja
Portuguese	Brazil	Megaevolução (Pokémon GO, XY096-present, TCG, Pokémon Characters Guidebook) Mega Evolução (XY002-XY068)
Portuguese	Portugal	MegaEvolução
Russian		Мега-Эволюция Mega-Evolyutsiya (Pokémon Ultra Sun and Ultra Moon website, anime) Мега Эволюция Mega Evolyutsiya Мегаэволюция Megaevolyutsiya
Spanish		Megaevolución
Swedish		Mega-utveckling Mega-evolution*
Thai		วิวัฒนาการร่างเมก้า Wiwatthanakan Rang Mega วิวัฒนาการเมก้า Wiwatthanakan Mega เมก้าชินกะ Mega Shinka
Turkish		Mega Evrim
Vietnamese		Tiến Hóa Mega