Dark Bunny

  The Dark Bunny is the sequel to Bionic Bunny. The show scares D.W., and Arthur (although he does not admit it, was also afraid of the show when he first started watching it.) In "The Last of Mary Moo Cow," Dark Bunny was cancelled in order to make room for Mary Moo Cow.

When Bionic Bunny and Dark Bunny were born, it reveals that (in the episode "Happy Anniversary") the two were separated at birth. Dark Bunny was taken by an evil witch; hence making him a lot darker, and Bionic Bunny was taken by a robot.

Although the Dark Bunny show did not start until "That's a Baby Show!," that episode reveals that the superhero poster in the Tree House (which has been there since Season 1) is of Dark Bunny.