Bad Dog is a D.O.O.M. agent who wears a Punisher-esque T-shirt and serves as a minor antagonist in T.U.F.F Puppy. He has not had any speaking roles yet. Unlike Leather Teddy, he does not have any signature weapons. He hasn't appeared in the newer Season 1 episodes, and it's unknown if he will appear in future episodes.
- He is the first villain to get injured by Dudley.
- Possibly as a tribute to The Fairly OddParents (which was also created by Butch Hartman) Bad Dog's goatee is yellow and looks like an upside down fairy crown. In fact, throughout the series, there are hidden crowns in backgrounds, but it is noticeable on Bad Dog the most.
- Bad Dog had a laughing goof in Operation: Happy Birthday, and is voiced by Daran Norris, who also voices The Chameleon, Francisco, The Chief, and Jack Rabbit.
- Bad Dog also seems to have a friendship with Leather Teddy.
- Bad Dog is a playable character in the game Nick Dodgers.