Pokémon X&Y post-launch discussion thread - AKA Jinx is Upset

[Tasura]

There are rumors going around about three event Pokemon whose information exists on the GTS but not in game. They are Volcanion (Fire/Water), Hoopa (Psychic/Ghost), and Diancie (Rock/Fairy). Supposedly you can request them on the GTS.

So I tried this, and you can indeed deposit a pokemon and request one of those 3, but you can also deposit a Pokemon and request an Aaaaaa or a Tsiosjidjs. However it seems that if someone else requests one of those (Valcanion for example) that request will show up in the GTS, and will be excluded if you select "Don't Include Special".