The first of several challenges Red and Blue must face to reach Mt. Olympus. They must first fight here in the collosium to pass on to the next challenges. It has only appeared in Zeusbag. Their opponent is none other than the master martial artist Raccoon.
Raccoon has to shit right when he is about to kill Red and Blue, leaving them alive.
For some reason, the Roman Colosseum was placed in Greece.
Raccoon was the champion of the Colosseum, that is until Red and Blue "defeated" him.