Villain Male Rat

"Joker Rat" is an unnamed enemy of Dark Bunny, first seen in "The Last of Mary Moo Cow". He, "Aardvarkwoman", and "@ Man" were walking in a dark alley way until Dark Bunny confronted them. He also appeared in "Double Dare" in Mr. Marco's tape of the episode.

Trivia

 * He is a parody of The Joker from Batman.