Evil Jimmy is one of Jimmy's clones created in "Send in the Clones" and "The Trouble with Clones". He was created to do chores for Jimmy, though he causes trouble and escapes instead leaving the real Jimmy blamed. He later makes prank calls all over the Earth after hijacking the communication satellite. Not long after the prank calls he is captured by Jimmy.
Jimmy eventually attempts to turn Evil Jimmy good, though he fails, and Evil Jimmy just pretends to have redeemed himself, until he is able to use the duplication machine in order to create a whole new evil planet where everyone is evil. Unfortunately, the duplication device destroys the original of what ever it creates. The cause is revealed to be a dark chip placed in the machine, which he destroys in hopes of banishing Jimmy to the Dark Matter Dimension along with the rest of the planet. Then, Evil Jimmy and the planet start to disappear as he swears revenge shortly after. He was voiced by Rob Paulsen.
- Despite being one of Jimmy's enemies, he did not appear as a member of the League of Villians in the League of Villians episode. This is due to the fact that he's likely dead.
- Even though he swears revenge in his second appearance, he never did come back. The producers were planning on bringing him back, but due to the show's cancellation (which was because of DNA Productions going out of business), he never returned.