The moves Embargo and Magic Room, as well as Ability Klutz, will not prevent a Pokémon from using its respective Mega Stone to Mega Evolve. Moves that would take away the Mega Stone from a Pokémon, such as the moves Bestow, Covet, Fling, Thief, Trick and Switcheroo will fail, Knock Off will not remove the Mega Stone or gain additional power, while Abilities Magician, Pickpocket and Symbiosis will not activate.

Mega Stones are not affected by most moves or Abilities. Status conditions such as paralysis, sleep and confusion cannot prevent Mega Evolution, even if they result in the Pokémon not being able to move that turn. A Mega-Evolved Pokémon will only revert back to its original state if it faints or the battle ends if it is withdrawn, it will still be in its Mega Evolved state once switched back in. Mega Evolution will occur before most actions except switching. Mega Evolution is essentially a free action a Pokémon may make in addition to its normal move, but if a Pokémon does not use a move, it cannot Mega Evolve.

LimitationsĮach Trainer may only Mega Evolve 1 Pokémon per battle. The Mega Evolution icon flashes with colours to notify the trainer that Mega Evolution will be triggered. Two Pokémon have multiple different Mega Stones for their species, named X or Y after the Mega-Evolved form. A Pokémon requires a corresponding Mega Stone to Mega Evolve.Įvery Pokémon that can undergo Mega Evolution has a corresponding Mega Stone that is named after it, except for Rayquaza, which instead needs to use the move Dragon Ascent to Mega Evolve.

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