Mega Evolution (Japanese: メガシンカ Mega Evolution) is a new transformation found only in the Kalos and Zen regions. Mega Evolutions are identified by having "Mega" in front of their name. In order to undergo a Mega Evolution, the Pokémon must be holding the applicable Mega Stone. An item containing a Key Stone must be used to resonate with the Mega Stone held by their Pokémon to trigger Mega Evolution. In Pokémon A and B Versions, both Robert and June use Mega Rings, while Leonardo uses a Mega Trigger.