Cousin Grimm was created for the Freak Fights by combining the DNA of previous celebrity combatants. It is not known for sure who's DNA is in Cousin Grimm, but it is believed he has the DNA of Roseanne, Bill Clinton, and a little Bigfoot (due to his body hair)). His first battle was with another super freak, Pierce McCrack. Grimm beat Pierce by ripping out his spine and jamming it through his torso, and won the first Freak Fight. Later on, he fights Potato Khan in the final match, and is killed when several mini-khans he has eaten climb into his head, and, while trying to kill them, he bashes his own head open.
- Grimm has no "material."
- He appeared as a playable character in Celebrity Deathmatch video game.