how about a 2 foot purple guy with eyebrows bigger than his head, and the strange ability to make things turn to custard just by thinking about them. he can run at 60 mph, but takes 3 screens or so to slow down. and if he touches a wall or the ceiling, millions of ping-pong balls flood the screen, killing him instantly. he can also fly by pressing the key just left of the CAPS LOCK key, but this ability only lasts 46 hours before he catches fire for no reason.
no, wait, that's silly...
he can make things turn to mustard just by thinking about them.