Mega Evolutions for Venusaur, Blastoise, Charizard!

Mega Venusaur has the ability Thick Fat, Mega Charizard has the ability Drought and Mega Blastoise has the ability Mega Launcher. You will need to obtain a bracelet called the Mega Ring that holds a mysterious stone called a Key Stone. The Trainer's Key Stone resonates with the Mega Stone held by his or her Pokémon.

There's also a Pokemon Bank, basically a PC box stored in the cloud. You can store and download your mons on your 3DS whenever or wherever. This is their idea for trading Pokémon from previous gens to X&Y. There's a Pokemon Transporter for the same function, and these are still in development. BUT there's an annual fee for the maintenance of your box.