SpongeBob threatened him when he was retired and when Barnical Boy tried to help the Atomic Flounder but he got mad and blasted Barnical Boy, he was burnt to a crisp and SpongeBob treated him.
SpongeBob threatened him when and when Barnical Boy tried to help the Atomic Flounder because he had already retired from crime. The Atomic Flounder got mad and blasted Barnicle Boy, Barnicle Boy was burnt to a crisp and SpongeBob treated him.