Evil Carl is Carl's evil clone. Unlike Good Carl, Evil Carl is tough, a bully and extremely cruel towards his everyone in his path. He seems to be very powerful in the Evil School. He was about to beat up Jimmy, when Evil Sheen showed up and showed them his new Robo Fiend action figure. He then pushed Jimmy into the classroom. He then joins Evil Ms. Fowl and the rest of the evil kids to kill Jimmy when he accidentally acts polite. Evil Jimmy then sucks the Evil Earth into the Dark Matter Dimension to prevent it from fading and Good Jimmy from escaping.

In the planned season four, Evil Carl and the clones would've returned from the Dark Matter Dimension and attacked Jimmy and his friends, who were on a class field trip to an asteroid.