Punch was a clone trooper who served in the Grand Army of the Republic during the Clone Wars. They were part of Clone Sergeant Slick's squad during the campaign on Christophsis. Having discovered that one of the clones had committed espionage on behalf of the Confederacy of Independent Systems, Clone Commander Cody and Clone Captain Rex sought the traitor's identity. Their investigation led to an interrogation of Slick's troopers, including Punch who mentioned being in the base's mess hall with Sketch at the time when Cody and Rex tried to capture the spy.