Probably 3DS, given that they just released a console game and prior to that, hadn't since 64. Not to say Kirby Wii wouldn't be awesome and likely, given that we saw trailers for it, this looks more like 3DS-worthy with all the Super Effect powers. And if it was ongoing dev of Kirby Wii, they would've shown off the helpers a bit, this game seems to have a different gimmick w.r.t. the super powers.