Dr. Rabies is a villain who looks just like Dudley, but with an eyepatch and facial hair. Unlike Dudley, he has a deeper voice with a sort of Russian accent, and is a lot smarter. Dr. Rabies is assumed to work with Madame Catastrophe from time to time. So far, he has only appeared in the episode The Doomies. Like Dudley, he is voiced by Jerry Trainor.
- His facial hair may be an homage to the joke that evil doubles have facial hair.
- His name is a reference to the fact that "97% of the real world's rabies cases come from dog bites."
- He put a plastic cup over the Chief (his number one weakness) in The Doomies.