[quote=Necrosis]
Just wondering about the riddle game between bob and unicorn. Is there anything to actually enforce the rules? Like if one of them loses can't he just say screw you guys I'm going home?
[/quote]

Bob could, but he's bound by his peculiar code of honor. He never breaks the rules of a game, not unless his opponent does so first. Unicron, being a duck, is incapable of breaking the rules and living.