Foster's Home for Imaginary Friends

Challenge of the Superfriends (4x1)

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When a large and dangerous imaginary friend is destroying the city, Imaginary Man comes and saves the day, and now, Mac is a fan. But once Mac is his sidekick, Bloo is jealous and joins forces with Nemesis, Imaginary Man's mortal enemy. Will justice or evil win in the battle of the superfriends?