A Mutant Earthworm is the 4th opponent chicken Jack fought in
the Creature Combat Club. It's a large worm that has antenna eyes and a sucker-like mouth. Its blood is extremely toxic and can melt almost any material. It was brought out in a silver dome container.
Burrow: The Mutant Earthworm usually travels underground.
Surface: The Mutant Earthworm surfaces from below and tries to smash any opponent.
- It's an obvious parody of (or can possibly be) the Mongolian Death Worm, an alleged creature dwelling in Mongolia which has the same properties, but the body of a Mongolian Death Worm kills by electrocution.