For some situational stuff, let's not forget that you can B-bounce Wario's bike after throwing, the same way he does, by holding "B". If Wario gets caught under the bike, and it's pounding on him, you can perform some nice combos. Situational, but something to remember.
We should also keep in mind that we have almost all of our moves to use on him, out of a grab release, including a footstool, that you can make use of in any way you want.
There's probably more, but this was thought up as I typed, so yeah...