...Its kinda shabby I know

The Mushroom boss is actually much taller than how they're 'depicted' here. You'd have to use the walls of the arena as a gimmick.

Couldn't think of the names for the other three, and I couldn't think of anything truly cool for Pineapple, so pretend they have something, like a surfboard or a bowling ball

(And if it isn't obvious, the Sausage is a Mafia Boss lmao)