Playing a few days ago on my Wii, I’ve noticed that a game on ping-pong was against… Joker, the one from the Batman – The dark night, played by Heath Ledger. Here’s the photo:

I’ve played ping-pong with Joker

Sorry for the not so good photo.
Also, I’ve played with a Mii that looks like a devil – the classic one. And with a ninja, and with some sort of one eye pirate and some of them used to play with some sort of shoe instead of a normal ping pong racket (is this the correct word?)