Mickey Mouse universe to Duckburg, the city in which Donald Duck lives (see Donald Duck universe). According to traditional continuity, both cities are located in the fictional U.S. state of Calisota – analogous to Northern California. The most consistent aspect of the Mickey Mouse universe is the characters. The most well-known include Mickey's girlfriend Minnie, pet dog Pluto, friends Horace Horsecollar, Clarabelle Cow, Donald Duck, Daisy Duck and Goofy, and nemesis Pete. Some Disney productions incorporate characters from Disney's animated feature films, such as "Bath Day" (1946; in which Figaro from "Pinocchio" appears as Minnie's cat), "Mickey's Christmas Carol" (1983), and – most
Donald Duck universe city, to a bustling metropolis. Later writers and artists most of the time also continues this tradition. In one specific story by Barks, "Monsterville" (1961), Duckburg was even transformed into a futuristic city by Gyro Gearloose, however it proved that the citizens were not ready for the high level of technology that the new city provided. Thus the city was turned back to its old city structure. In comic writer Don Rosa's stories, Duckburg and the state of Calisota is located on the West Coast of the United States, though Carl Barks himself and other writers often leave the city's