The Jazz Fool is a Mickey Mouse short animated film first released on October 15, 1929, as part of the Mickey Mouse film series. It was the twelfth Mickey Mouse short to be produced, the ninth of that year.
The cartoon's title combines the titles of two Al Jolson films: The Jazz Singer (1927) and The Singing Fool (1928). An early version of Horace Horsecollar appears, but is not yet the anthropomorphized character that he later evolves into.
Horace Horsecollar is a cartoon character created in 1929 at Walt Disney Animation Studios. Horace is a tall anthropomorphic black horse and is one of Mickey Mouse's best friends. Characterized as a boastful show-off, Horace served as Mickey’s sidekick in Disney's early black-and-white shorts.
Horace first appeared as Mickey's plow horse in the 1929 cartoon The Plowboy. Later that same year, he appeared in The Jazz Fool and afterwards became a regular member of the Disney supporting cast along with Clarabelle Cow and Clara Cluck. Though typically a supporting character, he was given significant screen time in the cartoons The Beach Party (1931) and Camping Out (1934). In recent years, Horace has appeared in the television series Mickey Mouse Works, House of Mouse, Mickey Mouse, and Mickey and the Roadster Racers.