Doctor Negative

Doctor Negative is an enemy of Mermaid Man and Barnacle Boy whom Squidward cosplays in the episode "Mermaid Pants".

DESCRIPTION
He wears a white coat with a red circle-backslash symbol and a black eye mask and a head mirror.

ROLE IN EPISODE
SpongeBob and Patrick are playing Mermaid Man and Barnacle Boy. SpongeBob calls himself "Mermaid Pants", and Patrick is calling himself "Barnacle Star". They notice Squidward, whom they think is Doctor Negative. Squidward doesn't like their game. In the Krusty Krab, he told SpongeBob to throw out the trash, but SpongeBob punches trash bag, causing that place becomes dirty, and all customers are leaving after the incident. Mr. Krabs comes out and sees that SpongeBob and Patrick are playing Mermaid Man and Barnacle Boy. He shows Squidward his secret collection of comic books. Mr. Krabs dressed himself as Captain Tightwad, and dresses Squidward as Doctor Negative. Now in costume, the two fight with Mermaid Pants and Barnacle Star. Mermaid Pants points out that no superhero will fight supervillain unless that villain has commited the crime. They go to a bank and Captain Tightwad and Doctor Negative pretend to rob it, until they get beat up by security guard.