|Mutant Prairie Dog|
|Species||Mutant Prairie Dog|
|Powers and Abilities|
|First Appearance||Ben 10 vs. the Negative 10: Part 2|
It is a big, four-legged canine-like mutant. It has a pale brown skin and brown fur on its back, neck, tail and legs. It has four claws on each feet. Its body has several lumps, while its face has spikes and orange pupil-less eyes. The teeth from its lower jaw come out in the opposite direction, which resemble spikes.
- Ben 10 vs. the Negative 10: Part 2 (first appearance)