Barnacle Man is an alter-ego/darkside of Barnacle Boy in the episode "Mermaid Man and Barnacle Boy V."
Barnacle Man is Barnacle Boy dressed in a vampire-style cloak with a red shirt that has a skull-and-crossbones on it. He is part of EVIL (Every Villain Is Lemons).
Role in series
"Mermaid Man and Barnacle Boy V"
Barnacle Man is formed when Barnacle Boy joins the dark side after getting fed up with Mermaid Man still treating him like a child.
He is seen in the "Mermaid Man and Barnacle Boy V" segment of the book.
He had the same role as the episode.
- This is the only time where Barnacle Boy becomes evil.