So what is
the XY version?
Not exact matches
Today's Pokémon news: Niantic's statement about Pokémon bans, preview for the next episode of Pokémon
XY & Z (anime series), videos for the The Great Pikachu Invasion, Pokémon Red
Version / Blue
Version / Yellow
Version: Special Pikachu Edition, and Pokkén Tournament.
Whereas the earlier announced brother is aggressive and performance oriented, the
XY is a posh
version aimed at luxury and comfort.
It could be a 3rd
version exclusive Pokémon, it could be a Pokémon that can be patched in
XY / ORAS (previous event PKMN were never patched into the other games but it's theoratically possible).
The fan theory is that they will make a sequel (like Black / White 2) or third
version (like Yellow, Crystal, Emerald, Platinum) called Pokémon Z to accompany Pokémon
XY.