Pluto Junior
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Pluto Junior is a fictional character created by Walt Disney. He first appeared in Pluto's Quinpuplets in 1937 where he was one of five puppies belonging to Pluto and Fifi but he was not named in that cartoon. Then he appeared in Pluto, Junior in 1942 where he was without his siblings and finally named. In that cartoon, he and his father (who tries to take a nap) engage in a slew of sight gags, including a ball, a caterpillar and a clothesline.
After that cartoon was released, Pluto Junior never appeared in another film.