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RIMega Evolution is a temporary battle transformation introduced in Pokémon X and Y (Generation VI). It allows certain Pokémon to evolve beyond their normal final form during battle, gaining greatly increased stats, sometimes a new Ability, and often a new typing or appearance.
To Mega Evolve, a Trainer must have a Key Stone, and the Pokémon must hold its specific Mega Stone. Mega Evolution only lasts for the duration of the battle and can be used on one Pokémon per battle.
Mega Evolution represents the deep bond between Trainer and Pokémon, but it also comes at a cost—some Pokédex entries mention that Mega Evolution can cause the Pokémon physical strain due to the overwhelming power.
Overall, Mega Evolution is remembered as a fan-favorite mechanic, blending strategy, lore, and dramatic design into Pokémon battles.
@rioluboo
