Item Boost is an ability in Kingdom Hearts II, which increases the effect of all recovery items used on the field (i.e., Potions, Ethers, Elixirs, etc.). It can be learned at a different level depending on the weapon Roxas chose (Sword, Shield, or Staff), is equipped on the Monochrome Keyblade, and other party members also have it. This ability costs two AP.
| Characters | Level Learned |
| Sora |
Strength Style (sword): 17 Defense Style (shield): 7 Magic Style (staff): 9 |
| Donald Duck | Equipping "Rising Dragon" |
| Goofy | Equipping "Save the King" |
| Mulan | N/A |
| Beast | N/A |
| Jack Sparrow | N/A |
| Aladdin | N/A |
| Tron | N/A |
| Riku | N/A |