Dennis is a mechanic in the town of South Park with a drinking problem. He's an acquaintance of Bill, the owner of Whistlin' Willy's Pizza Gulch, and he's also a friend of Darryl Weathers. He seems associated with the town's redneck population and their activities.
- W.T.F. (s13e11; cameo/debut)
- T.M.I. (s15e04)
- Let Go, Let Gov (s17e01; deleted scene; identified as Pat)
- Cock Magic (s18e08; cameo)
- You're Not Yelping (s19e04; first identified as Dennis)