Ability Unit

Ability Unit Ⓛ is a weapon panel linkable to any weapon with a link zone. Ability units add an unlockable ability to any weapon so long as they are actually equipped. These are avaliable in Kingdom Hearts 358/2 Days. They can obtained from the moogle shop under "Buy", and can be obtained by fully completing missions 15 and 30, as a reward. There are only a total of 3 ability units in the game. Also they change the weapon Roxas is wielding if they are equipped to the Zero Gear.