Even with the outstanding Bikini Bottom Police Department on patrol and enforcing very strict laws, the criminal underworld of Bikini Bottom isn't stopping. From bank robbers to serial killers to boat jackers, the city's top criminals aren't holding back.
A cool guy who loves to get into illegal street races. His accomplices are a young lady and a laughing muscle fish. His only appearance was in the episode The Hot Shot when he raced SpongeBob and Tony Fast Jr.
A serial killer who enjoys getting revenge by strangling people including SpongeBob. His only appearance so far has been in the episode SpongeBob Meets the Strangler.
A bully at his young age who has been to jail for littering. He is SpongeBob's cousin as well. He was very big in his childhood, but now, he is very small. His only appearance so far was in the episode BlackJack.
A group of babies or very small people found guilty of grand theft. Their only known crime is stealing Neptune's Jewel of the Sea in the episode The Great Patty Caper.
A man who is found guilty of grand theft. His only known crime is stealing a fortune worth of ham sandwiches in the episode The Great Patty Caper.
A gang in New Kelp City that scares people into not blowing bubbles. They've only been mentioned or seen in Whatever Happened To SpongeBob?.
A boat jacker who stole SpongeBob and Patrick's precious car.
A man who loves being evil. He is Mermaid Man and Barnacle Boy's second biggest enemy.
A moth who loves being evil. His only appearance so far was in Night Light.
Criminal in "Dead Eye Gulch".
A criminal who was wanted for multiple charges.
Went to jail under many charges. Owner of Mrs. Puff's Boating School.
The nemesis of Mermaid Man and Barnacle Boy.
Like Mermaid Man and Barnacle boy, The Atomic Flounder is retired. He attended book club with other evil villans when he was young.