Chase is an Autobot. He transforms into a blue police car and a stegosaurus. He has a very 'by-the-book' approach to most tasks and situations and often quotes from guidebooks, manuals, rules and regulations. In "Shake Up," he tried joking, but failed many a time.
Chase and the rest of the Rescue Bots were originally Cybertron Rescue Team Sigma 17, a space rescue team. Having been on routine patrol before the war between Autobots and Decepticons erupted, Sigma 17 was responding to a distress call that led them into an encounter with an energon draining organism. Barely escaping, they entered stasis and set the autopilot back to cybertronian space. He and the others awoke to Optimus Prime's voice, alerting them to go to Earth..
Chase has three separate forms in the series: robot, vehicle and dinosaur. In robot mode, he can carry two passengers in his cabin, and has a spotlight in his forearms. He also has taser-like weapons in his arms. In vehicle mode, he is fast and agile, very much like a sports car. His dinosaur form is a stegosaurus, and he can electrify his tail, enabling him to stun opponents with a swipe or fire off taser blasts.