Best game I've ever played.
Sound: I LOVE the orchestrated themes. But every once in a while, you hear things that you can't decifer.
(ex: Luigi's 'Letsa Go !' sounded like 'I Like Pickles !')
Multiplayer: WOW ! Amazing !
Single Player: They could have improved but still, WOW !
Characters: There is a wide selection of characters. However, almost half of them have unorginal moves. Oh well ! Nintendo only had 2 years to work on this game...
Stages: ALL the stages are very well designed. But the Ice Climbers stage is a stinky butt.
You should definately buy this game. Or wait for the sequel coming out in 2007..... I guarentee you'll have a HUGE addiction to this game.