Guest Stars Keith David voices Reverse Giraffe Matt Walsh voices Sleepy Gary Tony Barbieri voices Uncle Steve Tony Barbieri voices Mr. Beauregard Co Starring Tara Strong voices Tinkles Tara Strong voices Doctor Tom Kenny voices Nazi Tom Kenny voices Pencilvester Kevin Michael Richardson voices Frankenstein Kevin Michael Richardson voices Hamurai Kevin Michael Richardson voices Mrs. Refrigerator Ryan Ridley voices Cousin Nicky Jevin Smith voices Rapper