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- SpongeBob SquarePants
- Patrick Star
- Squidward Tentacles
- King Neptune
- Sheldon J. Plankton
- Gary the Snail
- Eugene H. Krabs
- Nichos (debut)
- People looking at the SpongeBob Mural
- The Sir Albert Spongestein painting is based on SpongeBob from the ending of the episode "Scaredy Pants."
- Most of the clay image featured in this short appears in on the colophon page of The SpongeBob SquarePants Experience: A Deep Dive into the World of Bikini Bottom.
- Some of the paintings appear in Battle for Bikini Bottom - Rehydrated.
- Albert Spongestein is a parody of Albert Einstein.