For example, Venasaur gets a much bigger flower on its back, and Blastoise switches its two hydro canons out for a single, massive one. Mega designs often exaggerate prominent features of their base-form Pokémon. All of these were introduced in Pokémon X and Y and Pokémon Omega Ruby and Alpha Sapphire, and all Megas are based on Pokémon that can't normally evolve further. There are 46 Pokémon total Pokémon capable of Mega Evolution, and there are 48 different Mega Evolution forms. Related: Every Pokémon Type Weaknesses Explained: Which Is Best Against Which In Pokémon GO, for example, there are only 10 Pokémon currently able to Mega Evolve. It also appears in some spin-off games, but it's usually just a bonus there that's limited to a short list of species. Mega Evolution has appeared in X and Y, Omega Ruby and Alpha Sapphire, and Sun and Moon. Mega Evolution lasts until the Pokémon is knocked unconscious or, unlike Gigantamaxing and Dynamaxing, the entire battle, if the Pokémon stays alive.
Once per battle, a single capable Pokémon in the party can Mega Evolve for the duration. Mega Evolution allows capable Pokémon to gain a new, temporary evolutionary form when holding the correct Mega Stone. While some variation of the former two mechanics can be used by all Pokémon, only certain species can Mega Evolve - and that list isn't as long as some players might like. Between Sword and Shield's Dynamax and Gigantamax forms, Sun and Moon's Z-Moves, and X and Y's Mega Evolution, traditional Pokémon battles have become more exciting and engaging. Every recent Pokémon generation has introduced a unique battle mechanic.