Mr. Mojo’s Rising: When Mojo Jojo kidnaps the Professor, it’s a blast from the past—a blast of Chemical X, that is. After Mojo Jojo reveals he was once the Professor’s “beloved” assistant, the Professor is coerced into giving Mojo the same superpowers as the Girls. However, once empowered, the true evolution of this super-villain chimp comes to light, a fact Mojo Jojo will certainly regret (he caused Professor to add Chemical X to the perfect little girl formula, creating the Powerpuff Girls).

Mr. Mojo’s Rising