— SpongeBob doppelgänger
The SpongeBob doppelgänger is an anthropomorphic sponge who resembles SpongeBob, hence his name. He would have appeared in "Dunces and Dragons," but was scrapped. He is still featured in the animatic version of the episode though.
- Despite being removed from the actual episode, the SpongeBob doppelgänger is still listed in the end credits. He was voiced by Rodger Bumpass.