How many are coming as HUMANS? Ya gotta have humans...unless it's Mystery Dungeon (although there you have humans that've been turned into pokemon) or some chapters of PokeWake or Magical Pokemon Journey. Or some of the gag comics.
I want to have a movie bad guy brawl. Forgiving that, at least a Team Leader brawl. As many Team Leaders as we can cram into one place. And there's a lot of Team Leaders.
Bear in mind some are, in fact, pokemon.
And the more manga characters, the better. If anyone can actually pull off Mask of Ice, I will love you. And if anyone ANYONE comes as anyone from the aforementioned Magical Pokemon Journey, I will love you FOREVER. And I don't want to be the only PokeWake cosplayer ever...I saw a kimono Erika this year and that was VERY LOVELY...but she'd never heard of PokeWake and was cosplaying game version...so sad. But I got a nice picture anyway.