Having revealed Bulbasaur, Charmander and Squirtle as additional starter Pokémon, Game Freak’s Junichi Masuda has revealed that each can also Mega Evolve during battle.
Joining the ever expanding list of those that can employ use of Pokémon X and Y’s key new mechanic, players must first obtain their unique Mega Stone to benefit from the ability.
Masuda also discussed a second requirement for Mega Evolutions, which is a bracelet known as the Mega Ring which contains a mysterious Key Stone. This resonates with the Mega Stone held by your Pokémon, the interaction of which will trigger the evolution, that wouldn’t normally be possible.
Pokémon X and Y will release worldwide exclusively for Nintendo 3DS on October 12th.