When superheroes team up, we know we're in for a good showdown. When villains team up, we know we're in for a great one, and HIM and Mojo Jojo are no exception. They've had their differences in the past, but when they come together to take on the Powerpuff Girls, we can't help but feel like we've gotten two episodes for the price of one. Sure, they're wildly different villains, but that's what makes them such a great pair.