Foster's Home for Imaginary Friends - Season 4 Episode 1 -
Challenge of the Superfriends
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?
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Max 255 characters.