Anderson returned to Berkeley where he and childhood friend Jay Ward began production. Ward ran the business side and Anderson handled the artistic and creative work.
Anderson's work included "Crusader Rabbit," a cartoon series sold to NBC with 195 episodes. It was the first created specifically for television.
Another cartoon of his was "Dudley Do-Right," a Canadian Mountie inspired by Nelson Eddy's performance in the film "Rose Marie."
Most notably, Anderson is credited with creating Rocky the Flying Squirrel and his pal Bullwinkle, a moose.