Foster's Home for Imaginary Friends

Mac takes Bloo to school for show and tell. The kids love Bloo so much that they imagine their own variations on Bloo. Hundreds of Bloo clones are created, and Bloo dubs them his minions and himself leader. Mac plans on going to take Bloo to see The Ice Charades, but with hundreds of Bloos, he can't figure out which is the original.