Mojo Jojo created the Rowdyruff Boys by flushing armpit hair, snails from the cafeteria, and the tail of the talking dog down a jail cell toilet that contained the apparent potency of Chemical X ("snips, snails, and puppy-dog tails"). They have very similar abilities to the Powerpuff Girls, but they all possess very easily targeted weaknesses, originally an aversion to Cooties (fixed by HIM), shrinkage when their egos are damaged, and an obsession with destruction that can lead to their own downfall.