Mermaid Man and Barnacle Boy action figures are toys of Mermaid Man and Barnacle Boy. The Mermaid Man figurine first appears in the episode "Mermaid Man vs. SpongeBob," while the Barnacle Boy figurine first appears in "Toy Store of Doom."
Role in series
"Mermaid Man vs. SpongeBob"
"Toy Store of Doom"
When SpongeBob and Patrick are in Squidward's house trying to find something to play with, SpongeBob takes out the Barnacle Boy only to reveal that it is all chewed up and saliva-covered, due to Patrick chewing on it and the Mermaid Man figurine.
Six different figures appear in this episode when they are extruded from SpongeBob's holes as he confirms that he and Patrick have all the necessary supplies prepared for the Mermaid Man and Barnacle Boy marathon.
The Mermaid Man action figure makes a cameo on the living room floor of SpongeBob's house when he and Plankton are watching a movie.