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
Brother's Little Helper eventually stops at the school. There, he points the tank's cannon into the sky and shoots down a Major League Baseball satellite; inside are detailed documents on everybody's behaviors. Mark McGwire appears, distracts the citizens with a long home run, and hides the evidence under his cap. Marge takes Bart off Focusyn for good and puts him back on Ritalin. Major League Baseball, however, still spies on the Simpson family due to an autographed bat McGwire gave Bart that has a hidden camera. "Brother's Little Helper", which was originally called "Bart a Go Go", was written by staff writer George