For a Hoopa Unbound, I might suggest an Impish nature because it attempts to patch up Hoopa's horrid Defense, and it has so much Sp. Attack anyway, while not sacrificing any of it's other stats. Reflect, Focus Blast, Hyperspace Fury, & Psychic isn't a bad moveset for Hoopa Unbound, seeing that Focus Blast is a nice coverage move. (btw, I already have my Hoopa with the setups mentioned above :P)