Mario With Lasers
Self-proclaimed NERFED king
Volcanion is the last Event legendary in XY, it's most likely being revealed in "Pokémon Z". Hoopa will almost certainly be released between ORAS's and Z's release, so it's possible it might get some backstory revealed in Mossdeep or whatever.
(or maybe we finally travel to the Moon and battle Hoopa and--)
(or maybe we finally travel to the Moon and battle Hoopa and--)