Sonic has Party with Singleplayer too - It's good. And you can play it always, With Warioware you can only REALLY Enjoy it with Friends - I got Sonic and it rocks
lol i juss got sonic and wario a couple of days ago....i would say go with sonic cuz its more of an adventure game and it doesnt get boring as quick and its still got a mini game kinda thing so its Koo