| Unofficial name
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| "You think I'm special!"
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Barnacle Boy's Son never made a physical appearance but he has been mentioned by Barnacle Boy to SpongeBob while inside the Rock Bottom Museum. Barnacle Boy tells SpongeBob if the robots aren't stopped, Shady Shoals will be shut down and he'll be forced to move in with his son, his son's wife, and their four children much to his displeasure (as Barnacle Boy describes them as "screaming").
- If the player goes into the Rock Bottom Museum for the first time as Sandy Cheeks, instead of SpongeBob, and completes the "Plundering Robots in the Museum" mission as that character, Barnacle Boy will not mention his son.