Versus

Mario VS PACMAN

Godzilla VS Statue of Liberty (lol USA FTW)

Cops VS Prisoner

Emo VS Goth

Frodo VS Harry Potter

Hobo VS Airhead

(Sadly Not as epic as it sounds) Leonidas VS Chuck Norris

Neo VS Skywalker

Pamela Anderson VS J Lo

Bill Gates VS Professor

Hunter VS Fisherman

There are a quite a couple more.
From tvigle and the auctrix team