A character created purely because the fleet of ghostwriters forgot that they already had a short guy in the form of Ken Matthews. Or the ghost writer of The Bully didn’t want to make Ken Matthews a victim of bullying. I don’t think we ever see Jimmy again. He is described thusly: “Jimmy was the smallest boy in school. He was even shorter than Ken Matthews. Everyone teased him about his size, but he was well liked and protected by the bigger guys, especially Aaron Dallas.” Ah, the juxtaposition of being ruthlessly teased, but well-liked and allegedly protected. Feels like a protection racket to me.