¿Pokémon X and Y information?:

A new move, called "magic rain" reduces all pokémon´s attack and special attack drastically and restore all HP of them.

A new stat will be included, we don´t know more.

Some pokémons, as Chimecho, will can evolve in this games.

Xerneas and Yveltal live in the called "magical tree", Xerneas is the horizontal pokémon and Yveltal the Vertical pokémon.

In some zones you must wear different clothes.

The item that your pokémon held, now is visible in battle.