The Official April NPD Thread (Data at 6:30 PM EST)

[Soundwave]

I think this might also put a ki-bosh on the "Nintendo doesn't need core games". 

Clearly Smash Bros. Brawl and Mario Kart Wii (which I still consider a core game, Wii Wheel or not) helped the Wii out a lot last year. 

I think Punch-Out! will be a hit though.