Pokémon X and Pokémon Y are the primary paired versions of the upcoming Generation VI. The games will be available on the Nintendo 3DS.
Both games were revealed during a worldwide announcement by Satoru Iwata through Nintendo Direct at 8 pm JST, on January 8, 2013. The paired versions will be released worldwide (except for select countries) on October 2013 and will be available for both retail sale and download.
Unlike any other games in the main series, Pokémon X and Y feature a completely three dimensional style of gameplay, and 3D modeled characters and creatures are used, rather than sprites like has been done since Generation I. The battle system is aesthetically overhauled, featuring more lively reactions to the attacks, such as when a Pokémon is being hit.
Currently, 6 new Pokémon are confirmed for X and Y. How many total new Pokémon will be released is unknown at this point