Dedede's Drum Dash Deluxe remains one of the only Kirby games in which I've never fully completed; in this game specifically, I've never been able to get a platinum medal on the final level.
So that's where most of the design inspiration for this float came from. The big spiky pencils being the first thing you see, Magolor obscuring some of the level, and while I don't think that little Dedede keychain is in the finale, it might as well be because that's my reaction whenever I think about it.