Rocko's Modern Life is an American animated sitcom created by Joe Murray for Nickelodeon, the series centers on the surreal life of an anthropomorphic Australian-immigrant wallaby named Rocko as well as his friends: the gluttonous steer Heffer, Heffer Wolfe is a fictional character on the cartoon "Rocko's Modern Life" and the comic book series of the same name, who provided the voice of the anthropomorphic steer.?