The Mermaid Man Collectible Underpants are an article of clothing that only appear in the episode "Pineapple Invasion."


The Mermaid Man Collectible Underpants resemble regular underpants. They are green and blue in color with Mermaid Man's "M" on them as well.

Role in episode

The Mermaid Man Collectible Underpants appear after SpongeBob sees that the the underpants were damaged by Plankton. SpongeBob then comments that he could have worn them 1,000 more times.


  • It is unknown if there is a Barnacle Boy version of these underpants.
Plan Z
"This plan Z can't possibly fail!"
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