- "Babs, You have to learn some self control."
- —The Great and Powerful Principal
The Great and Powerful Principal is the Great and Powerful Principal of Acme Looniversity. He is a disembodied head colored green or orange that is surrounded by fire. He is a parody of the title character of The Wizard of Oz. He is voiced by Noel Blanc, the son of the late Mel Blanc. He first appeared in Her Wacky Highness. However, in his second appearance in the Looniversity Daze episode segment, The Learning Principal, it is revealed that the "Principal" is operated by a machine controlled by Bugs Bunny himself, the same way a man controls the machine in The Wizard of Oz.