After unlocking all Party Games, you will have access to the Gift menu. However, once you unlock all 99 monkeys, all 12 movies and the Staff Credit game, you will unlock a feature allowing you to keep a record of the number of Play Points you have achieved in one Challenge Mode game. The maximum amount possible is 17,080, which can be obtained by starting a game in Expert mode and clearing every single level including bonus levels without using any warps, all the way through the last level of Master Extra.