Betty Boop: "She Wronged Him Right" (1934)
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From Wikipedia: She Wronged Him Right is a 1934 Fleischer Studios animated short film, starring Betty Boop. This is also the first appearance of Betty's semi-regular boyfriend, Fearless Fred. Betty Boop appears in a stage play, complete with obvious theatrical backdrops. Betty doesn't have the money to pay the mortgage, so the dastardly villain Heeza Rat threatens to foreclose unless Betty agrees to marry him. The villain threatens Betty in various ways until the handsome and muscular Fearless Fred comes to her rescue.