Romper Stomper is a minor character in South Park: The Stick of Truth.
Romper Stomper plays no role in the story, other then an unlisted Side-Quest for his Friend Request. To get his request, the New Kid simply needs to go upstairs in the Police Department and enter the door on the vent on the left, as the door is locked from the inside. Once inside the locker room, the New Kid needs to find a key in one of the lockers and go downstairs. After this, simply open the cell door in the room on the left and talk to him.