Ability Unit

An Ability Unit is a weapon panel that is 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 only avaliable in Kingdom Hearts 358/2 Days. They can be bought from the Moogle Shop, and can be obtained by fully completing Missions 15 and 30, as a reward. There are only a total of three Ability Units in the game. Roxas is the only playble character in Mission Mode whose weapon will change when three Ability Units are equipped to the Zero Gear.