— SpongeBob Doppelgänger
SpongeBob Doppelgänger is an anthropomorphic sponge who resembles SpongeBob, hence his surname. 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, SpongeBob Doppelgänger is still listed in the end credits. He was voiced by Rodger Bumpass.