hoping that kind dedede is even in the game, i think it'd be perfect for this
http://www.vgmuseum.com/end/snes/a/kirbyssspring-1.gif
to be his stage, but in 3d of course, it'd be awesome to be boxed in an arena like that, making it a lil more challenging to knock your oppent out the ring.
plus the music for that stage was intense (for those who remember)