The Clayfighter games are weird. They're fighting games where the characters are stop-motion claymation... things. And they're not very good. But the characters and presentation are usually pretty well done, so I still played them.

In C2: Judgment Clay you have a roster of eight combatants to choose from.

Unless!

You go back to the title screen

And press and hold L & X, while you press Up, Up, Select, Up, Up, Right. Done right you'll hear a sound. And when you start the game

Eight more characters to choose from. Sure they're just recolored versions of the original eight with different names, but don't worry about that.