Item Boost

Item Boost (アイテムアップ) is an ability introduced in Kingdom Hearts II. It increases the effectiveness of recovery items. It can be multi-installed to increase its effects.

Mechanics
In Kingdom Hearts II, Item Boost is a that costs 2  to equip. Item Boost increases the effectiveness of restorative items used in battle by 50% for each Item Boost equipped. Item Boost only applies to items used by the character it is equipped to.

In Kingdom Hearts Birth by Sleep, Item Boost is a that can be installed up to three times. It increases the amount of HP restores by Item Commands and Break Time by 10% for each Item Boost equipped.

In Kingdom Hearts 3D: Dream Drop Distance, Item Boost is a that can be installed up to three times. It increases the amount of HP restored by Item Commands by 50%, the amount of Drop Gauge restores by 10%, and the amount of Link Gauge filled by 10%.

In Kingdom Hearts III, Item Boost is a that costs 2  to equip. It increases the effectiveness of restorative items used in battle by 50% for each Item Boost equipped. Item Boost only applies to items used by the character it is equipped to.

Kingdom Hearts II

 * Dual-Wielding Roxas has Item Boost as a default ability.
 * Sora learns Item Boost at levels 7 with the Dream Shield, 9 with the Dream Rod, and 17 with the Dream Sword.
 * Goofy has Item Boost as a default ability.
 * Mulan has Item Boost as a default ability.
 * Beast has Item Boost as a default ability.
 * Jack Sparrow has Item Boost as a default ability.
 * Aladdin has Item Boost as a default ability.
 * Tron has Item Boost as a default ability.
 * Riku has Item Boost as a default ability.
 * The Monochrome has Item Boost as its equipment ability.
 * The Rising Dragon has Item Boost as its equipment ability.
 * The Save the King has Item Boost as its equipment ability.

Kingdom Hearts II Final Mix

 * Dual-Wielding Roxas has Item Boost as a default ability.
 * Sora learns Item Boost at level 7 with the Dream Shield, 9 with the Dream Rod, and 17 with the Dream Sword.
 * Goofy has Item Boost as a default ability.
 * Mulan has Item Boost as a default ability.
 * Beast has Item Boost as a default ability.
 * Jack Sparrow has Item Boost as a default ability.
 * Aladdin has Item Boost as a default ability.
 * Tron has Item Boost as a default ability.
 * Riku has Item Boost as a default ability.
 * The Monochrome has Item Boost as its equipment ability.
 * The Nobody Lance has Item Boost as its equipment ability.
 * The Save the King has Item Boost as its equipment ability.

Kingdom Hearts Birth by Sleep

 * Item Boost can be attached to a, , , , , or Command recipe through Command Melding, either randomly or by applying a Soothing Crystal.

Kingdom Hearts 3D: Dream Drop Distance

 * Sora and Riku can purchase Item Boost from the Chef Kyroo Ability Link for 30, 50, and 100 Link Points.
 * Sora and Riku can purchase Item Boost from the Drak Quack Ability Link for 15, 25, and 50 Link Points.
 * Sora and Riku can purchase Item Boost from the Ducky Goose Ability Link for 15, 25, and 50 Link Points.
 * Sora and Riku can purchase Item Boost from the Escarglow Ability Link for 30 and 50 Link Points.
 * Sora and Riku can purchase Item Boost from the Juggle Pup Ability Link for 30 and 50 Link Points.
 * Sora and Riku can purchase Item Boost from the Kooma Panda Ability Link for 30 and 50 Link Points.
 * Sora and Riku can purchase Item Boost from the Ursa Circus Ability Link for 30 and 50 Link Points.
 * Sora and Riku can purchase Item Boost from the Drill Sye Ability Link for 30 Link Points.
 * Sora and Riku can purchase Item Boost from the Meow Wow Ability Link for 30 Link Points.
 * Sora and Riku can purchase Item Boost from the Pricklemane Ability Link for 30 Link Points.

Kingdom Hearts III

 * Baymax has Item Boost as a default ability.
 * The Warhammer+ has Item Boost as its equipment ability.
 * The Hero's Glove has Item Boost as its equipment ability.
 * The Star Medal has Item Boost as its equipment ability.