EXP Zero

EXP Zero is an ability that is only in Kingdom Hearts II Final Mix. The ability makes it so you do not gain any Experience Points while fighting enemies. It is available at the very beginning of the game if you decide to go through the game in Critical Mode. If you decide to use it, you can go through the whole game at Level 1. It is also the Passive ability for the Keyblade, Winner's Proof. There is no real purpose for EXP Zero, it is just used to make the game even more fun and challenging.