Mojo Jojo is a supervillain in the Cartoon Network animated series The Powerpuff Girls and its anime spin-off, Demashita! Powerpuff Girls Z. He is the number 1 archenemy of The Powerpuff Girls. He is very redundant, and often states the obvious.
In the 1998 series, he was originally Professor Utonium's lab assistant,but the explosion that created the girls transformed him into a mad genius.