Matt Groening (born February 15, 1954) is the creator of The Simpsons, Futurama and Life in Hell. He first appeared in episode 3: Show and Hell. He disguised himself as a sheep and then killed Cat, Hamster, Puppy and Donkey so The Simpsons could be more successful than RAB. Later, he appears in episode 12: Fucky Charms. It turned out he was the Leprechauns' leader. In episode 19: Dog Complex, he appeared and found out that RAB didn't make a movie, and his Simpsons Movie made millions.