AP

AP (Ability Points) are points that are used in the Kingdom Hearts series to equip the game's characters with abilities. The overall AP can be increased by leveling up, using items such as AP Boost, or wearing equipment that will increase the overall AP. If the player does not have enough AP, they cannot equip certain skills until they have more AP, or if they choose to unequip other abilities.

Kingdom Hearts
In Kingdom Hearts, you can raise your AP through AP Ups that can be synthesized or found in worlds throughout the series. Certain accessories, notably the Ability Stud, also raise a character's AP. AP allows you to equip abilities that can act as helpful tools.

Kingdom Hearts: Chain of Memories
In Kingdom Hearts: Chain of Memories, AP is not used at all in Sora's gameplay, rather, it is replaced with CP (card points). CP dictates how many cards can be used in the equipped deck, including offensive and restorative cards Sora uses as well as the passive-effect enemy cards available. In Kingdom Hearts Re:Chain of Memories, Sora does gain the abilities High Jump, Glide, and Superglide although these simply remain active for the remainder of the game and have no point requirements of any kind. In Reverse/Rebirth mode, Riku's deck is fixed for each world so he has no CP. While he does possess an AP stat, it comes in the form of Attack Points. He can only gain one AP per boost and can only boost it again after a few levels since he last boosted his AP. The higher Riku's AP is, the stronger his attacks are.

Kingdom Hearts II and Kingdom Hearts II Final Mix
In Kingdom Hearts II and Kingdom Hearts II Final Mix, the player can use AP Boosts on all characters including Sora, Donald, Goofy, and supporting characters. There are many AP Boosts in this game. AP Boosts can also be synthesized at Moogle shops or found in chests throughout the worlds. In Kingdom Hearts II Final Mix, AP Boosts can be obtained as much as you like by defeating Demyx and Luxord's data battle.

Kingdom Hearts χ[chi]
In Kingdom Hearts χ, AP is used when fighting Heartless, opening treasure chests, or finding random items on the ground. Each Heartless you fight or every treasure chest/item you find uses AP. For instance, when you go to fight a Shadow Heartless, this uses up around 1-3 AP near the start of the game. This is due to the fact that, as you gain levels, the Heartless you fight gain levels too, which, in turn, uses more AP. You start off the game with 50 AP. If you use all of your AP, you can use a potion to fill your AP back up by 10 AP per potion. If you use a Mega-Potion, your AP will fill to the max amount. If you level up, your AP will fill to the Max amount as well.