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 location more vaguely defined. However, in Don Rosa's "The Life and Times of Scrooge McDuck", the author alludes to where exactly he has situated Duckburg: "I won't bother to say precisely where I situated Duckburg and Calisota on America's west coast... but if you get out a good map and compare the coastline, you'll see that I stuck the old gold-prospector's adopted hometown directly across the bay from a very appropriately named actual city." Knowing how Don Rosa used gags, it is likely that this city would be Eureka, California ("Eureka" meaning 'I found it'!). This fits with the river