I've noticed on a match by gamepro editors(here is link http://www.gamepro.com/nintendo/wii/games/previews/139928.shtml) that a F.L.U.D.D. case is an item that appears in the demo.You probably have to jump on it to open it like the original F.L.U.D.D. cases in Super Mario Sunshine,but it can be thrown like a crate b/c of it's heavy shape.
No, that's an exploding box. The Inker 20:37, February 15, 2008 (EST)