Oooooh. Oooh. Online play? Does this mean this might be the dawn of the Nintendo "MMOs"? I know it's a single player game with online features, but it's more MMOy than Pokemon X and Y are.
I'm glad it's coming on portable because it's a game that I felt like feels right there. It's not quite pick-up put-down as say other Portable titles (set aside maximum 45mins for a Monster Battle), but it feels better there.