Celebi, the Time Traveller.
I was playing this at my friend's house earlier, and even though it was pretty fun, we were laughing at some of the parts where some of them were dancing, only because it was so unlike them to dance. I don't see this game mentioned that often. I think it's OK, but not the best. It's unique in being the only Mario game to make Waluigi the main antagonist. Any opinions?