Santa's Little Helper and is the center of the plots of several episodes. During the course of the show, he has fathered litters of puppies, passed obedience school, had surgery for bloat, replaced Duffman as the mascot for Duff Beer, and been trained as a police dog at Springfield's Animal Police Academy. Some of the episodes that focus on Santa's Little Helper have been inspired by popular culture or real experiences that staff members of the show have gone through. Although cartoon animals are often anthropomorphized, Santa's Little Helper generally exhibits canine behavior. Cast member Dan Castellaneta currently provides the dog's sounds on
The Simpsons: Night of the Living Treehouse of Horror a side-scrolling platformer. The game features seven levels, each one of which re-creates a tale from the annual "Treehouse of Horror" episodes of the American animated television series "The Simpsons". All five members of the Simpson family have their own level, with the exception of Homer, who has three. The levels include Marge in a zombie tale, Maggie as a fly, Lisa fighting cannibalistic teachers, Bart rescuing Santa's Little Helper in a haunted house, and Homer as a vampire killer, a robot, and the large ape King Homer. "The Simpsons: Night of the Living Treehouse of Horror" was developed by