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
Guardians of the Lost Library fathers of Gyro Gearloose and Grandma Duck. "Guardians of the Lost Library" was later referenced in Part 10: "The Invader of Fort Duckburg" (1994), of Don Rosa's "The Life and Times of Scrooge McDuck" where in 1902 the first three Junior Woodchucks are expelled from their former headquarter, the ruins of Fort Duckburg recently bought by Scrooge. As the boyscouts walk down Killmotor Hill, along with some JWC pennants they carry a large, old volume with the Iris Emblem of the Guardians of the Lost Library with them. One of the Junior Woodchucks says "Someday we've just got to make