Foster's Home for Imaginary Friends

Challenge of the Superfriends (4x1)

Air date: Apr 28, 2006

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?