The following is a list of Mermaid Man and Barnacle Boy episodes throughout the franchise.
| SpongeBob and Patrick learn that their heroes are retired.
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| SpongeBob wins a conch shell in a contest to summon his heroes.
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| Mermaid Man and Barnacle Boy leave SpongeBob and Patrick in charge of the Mermalair, where they proceed to free the evil Man Ray and teach him how to be nice.
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| SpongeBob plays with Mermaid Man's shrink ray on his utility belt, but doesn't know how to turn things back to normal size.
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| After being childishly teased for having "Boy" in his name, Barnacle Boy joins the dark side and a team emerges to try and stop him and his new allies.
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| SpongeBob and Patrick find out that a Mermaid Man and Barnacle Boy movie is in production and are using actors, so they make their own with the real heroes.
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| SpongeBob reads a scary book and develops a fear of the dark.
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| Plankton hypnotizes Mermaid Man and Barnacle Boy.
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| Patrick finds a rare trading card and SpongeBob tries to protect it.
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| SpongeBob ditches boating school, then gets distracted on his way back.
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| SpongeBob and Patrick pretend to be their heroes at a shuffleboarding contest, but get sidetracked on the way home.
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| SpongeBob and Patrick accidentally change past events with Mermaid Man's time machine.
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| SpongeBob and Patrick watch a lost episode of The Adventures of Mermaid Man and Barnacle Boy.
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| SpongeBob and Patrick learn the story of their heroes' origins.
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| Plankton and Man Ray join forces and try to override the Krusty Krab.
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| Patrick becomes a superhero and plans to clean up Bikini Bottom.
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| When SpongeBob and Patrick play Mermaid Man and Barnacle Boy, it's all fun and games until their "sworn enemies" arrive.
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| When Man Ray rents Squidward's house for the weekend, it's up to SpongeBob and Patrick to stop his evil vacation.
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| The long-lost episode of "Mermaid Man" is finally showing on TV, but SpongeBob may not make it home in time to watch.
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| Bubble Bass finds himself stranded with Patrick in a mysterious swamp, looking for a lost action figure.
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| The newly reformed "Clean Bubble" takes a dishwashing job at the Krusty Krab, where he is tempted by the grime.
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| Plankton joins the League of E.V.I.L. in another attempt to steal the Krabby Patty secret formula.
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| Bubble Bass and the Dirty Bubble team up to become Bikini Bottom's nastiest nefarious nuisance.
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| SpongeBob is challenged by E.V.I.L. to make a delivery to their secret lair in 10 minutes or less.
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References
