Hey, Pluto!
By 1930, Mickey Mouse had become a bona fide animated star. Since his creation two years earlier at the hands of Walt Disney and Ub Iwerks, he had starred in almost two dozen black-and-white shorts, ranging from his ever-popular debut in Steamboat Willie to Mickey’s Follies (1929), which introduced “Minnie’s Yoo Hoo,” the song that would remain Mickey’s theme for…