The Looney Tunes and Merrie Melodies series' had occasional entries which were driven not by one of their stable of stars such as Bugs Bunny or Daffy Duck, but by individual short sketches, usually filled with sight gags and word-play.
Bruce was used as a narrator in most of the cartoons that were directed by Tex Avery, Bob Clampett, and Chuck Jones.
Besides providing narration, Bruce was also heard as several characters in a few cartoons including "Dangerous Dan McFoo" where he voiced a dog with a cigarette and a referee.
[2] Later, he had a company based in Minnesota known as Robert C. Bruce Productions where he produced and wrote industrial films and commercials.
[5] Bruce never got a screen credit, but his voice was recognizable, and he is mentioned in the commentary for the Looney Tunes Golden Collection.