In 1939, Billy Bletcher and Pinto Colvig were hired to perform ADR work for the Emerald City munchkins in The Wizard of Oz. In MGM films, he voiced Spike the Bulldog and on some occasions even Tom and Jerry, in Tom and Jerry, and in Warner Bros. many characters, most notably the Papa Bear of Chuck Jones' The Three Bears. He portrayed another villainous wolf in Little Red Riding Rabbit.