Ape Warriors

In Abra-Catastrophe! Bippy got a hold of the magic muffin, and made the wish to make Apes the main species. When apes were briefly the dominated species, Humans had to live like they were caveman. The apes, would also torture those who would dare defy them, as was the case with Crocker and Francis. Eventually Timmy was able to change things back to the way they were, and the apes seen/ or heard again, after that.