I still wonder why they gave it to Mr. Mime and not Blissey or Audino...
Ironically we have 3 ghost Megas: Banette, Gengar, and now Sableye.
So that leaves Mismagius, Spiritomb, Chandelure, Froslass, Dusknoir, Giratina, the coffin ,Jellicent, and Drif. being the only ghost types without one. Wait, are those really all the final evolved ghost types? I hope I'm missing some. Maybe Froslass and Dusknoir will get Megas (Glalie too unless they pull a Gallade on it...but Hoenn is his/her home turf) as they are evolutions of Hoenn Megas.