Gummi Abilities (アビリティユニット/アビリティ, Abiriti Yunitto / Abiriti?, lit. "Ability Unit / Ability") are special upgrades that can be equipped to a Gummi Ship in Kingdom Hearts II and Kingdom Hearts III. They allow for more powerful attacks, heal the ship in flight, and other diverse features. Equipping an ability uses up a certain amount of AP so the number of abilities that can be equipped together is limited. Additionally, every ability has their own limit to how many times it can be stacked.
Kingdom Hearts II
In Kingdom Hearts II, Gummi Abilities are obtained as treasures or ranking rewards in Gummi Missions.
Limit Upgrades (スペシャルアイテム, Spesharu Aitemu?, lit. "Special Item") are permanent upgrades to the Gummi Ship.
Kingdom Hearts III
In Kingdom Hearts III, Gummi Abilities are obtained by reaching certain levels with the Gummi Ship.