So in Pokémon X & Y, you look for the answers t the Mega Evolution.

Supposedly it happens when the bond between a Pokémon and its trainer becomes very strong and special (and maybe some form of stone or whatever, details).

Well... there's only one way to achieve the ultimate trust, affection, and intimacy needed in such a bond.

Looks like this Charizard and its trainer figured it out before everyone else. It should be pretty ready for its Mega Form now, given how at peace they both look.

Charizard/Pokémon © Gamefreak
Art © moi