Back when Mojo Jojo tried to take over the world with primates, there was one monkey who didn't get his due - Mopey Popo. Now Mopey is back to try and be evil just as Mojo intended.

"Custody Battle" Mojo discovers that the Rowdyruff Boys are back and is determined to show them that he is a more evil dad than Him.

The Powerpuff Girls must literally work as one to try and stop Mojo Jojo from destroying Townsville.