Toad

Toad is a little faster than other characters, but has to trade off his jump height, causing his jumps to reach shorter heights.

Toad also appears to swim faster than many other characters and has a crazy flight while using Wing Cap, just like Waluigi. This is most likely caused by his faster run speed being filtered into his other movement stats. It controls a bit crazy but he can gain more height (potentially infinitely if WC never ended) allowing you to cheese a few things very quickly.