R.C. Pro-Am II is the sequel to R.C. Pro-Am by Rare. The biggest addition to the game is multiplayer, allowing up to four players to race against each other with the use of the NES Four Score accessory. Another difference is that instead of power-ups and weapons you can pick up on the track, you pick up money that can be used to purchase power-ups at a store in-between races. However, you can still collect rare letters that can spell out a word that can give you power-ups.
FatRatKnight and eien86 play the single player mode and complete all the tracks in first place, setting record times with the help of a brute-force bot to both find the fastest path and to manipulate the chance of getting the Letters so that power-ups can be collected as soon as possible. You can read the authors' notes for more details.