Ripster is a fictional character from the Street Sharks animated series. Originally, he was a human named John Bolton and is the eldest of the Bolton brothers until he and his three brothers Clint (Jab), Bobby (Streex), and Coop (Big Slammu) were all mutated into half-shark humanoid hybrids by their archnemesis Dr. Luther Paradigm (Dr. Piranoid) using a machine on them called the "Gene-Slammer," which splices the DNA of living organisms, turning him into a great white shark and eventually leading him and his brothers to defend their home of Fission City from Dr. Piranoid and other villains. As the oldest, Ripster is the de facto leader of the Street Sharks and also the smartest, who enjoys inventing things, which most of his knowledge and skills are taken up from his father, Dr. Robert Bolton. His teeth can chew through solid steel and is an avid pool player.