4x01 Challenge of the Superfriends
First Aired: Apr. 28, 2006 on Cartoon Network
Summary: Bloo becomes jealous when Mac becomes sidekick to an imaginary super-hero, Imaginary Man. Feeling that he is being neglected by Mac, Bloo decides to become a sidekick to Nemesis, an imaginary super-villain.
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Guest Stars[no credits found]