edit-
if this is real, I'm guessing you can unlock this video on xmas day if you have 100% completed the game, and have a DS.
co-op sure would be awesome..
www.wiisave.comanyone have a smg 241 star save to test it with?
that looks awesome though
fake.. and I got spoilers about Luigi..
fakeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee