Brain (Skylanders)

Brain is the secondary antagonist turned to supporting character in the game, ''Skylanders Imaginators. ''

Backstory
He once helped the Ancients create Skylands, but then betrayed them by using Mind Magic to brainwash everyone in Skylands into serving him. However, he was unable to mind control the dragons because of their magic, and was locked away by the Ancients for his betrayal.