Prep Challenge is a challenge mission in Chapter II. Unlike the other challenge missions, this mission must be completed as part of the game's main storyline.
The Mission
Intro
Jimmy sees a flyer inside the Glass Jaw Boxing Club, advertising a boxing tournament. The reward for winning is a house in Old Bullworth Vale worth $1,000,000. He decides to take advantage of the contest and enters the Boxing Gym.
Walkthrough
Jimmy has to beat 3 Preppies in a boxing match. The challengers are, in order, Chad, Justin, and Parker.
Epilogue
After Jimmy beats all of them, Justin informs him that he isn't eligible to win the prize because his parents aren't members of "The Board". Instead, Jimmy is given a run-down house underneath the lighthouse for his personal use.