Strength Boost

Power Boost, also dubbed as Power Up, is an item that appears in  and Kingdom Hearts II. It permanently raises the user's strength by one point. It can only be used from the stock menu.

In Kingdom Hearts Final Mix: Beginner Mode, Sora starts off with 8 Power Ups in his stock.

Kingdom Hearts II: Final Mix

 * Power Boost: Xemnas's Data Replica.

Kingdom Hearts

 * Power Boost: Chest at the Mystical House; Yellow Trinity; mail 10 Postcards; complete the Hercules Cup in under three minutes; complete the Shadow Cavern course of Jungle Slider; chest at the Storage Room; Green Trinity; chest at Guillotine Square; chest at the Clock Tower; Tigger's Giant Pot, rare nut reward from Owl; chest at the Entrance Hall; two chests at the Gate to the Dark.

Kingdom Hearts II

 * Power Boost: Obtain 35 different material types; obtain all Energy Materials; chest at the Underworld Entrance.

Kingdom Hearts II Final Mix

 * Power Boost: Obtain 35 different material types; obtain all Energy Materials; chest at the Underworld Entrance; chest at the Mineshaft; reward for defeating Xemnas in the Garden of Assemblage.

Kingdom Hearts
In addition, they can be synthesized from List IV by using the following:


 * 5 Power Shards
 * 3 Power Gems
 * 1 Power Crystal
 * 1 Mystery Goo
 * 2 Orichalcums

Kingdom Hearts Final Mix

 * 5 Spirit Shards
 * 3 Spirit Gems
 * 5 Power Shards
 * 3 Power Gems
 * 1 Dark Matter

Kingdom Hearts II
To synthesize a Power Boost, you need the Guard Recipe and these materials:


 * 1 Mythril Crystal
 * 3 Blazing Crystals
 * 3 Lightning Crystals
 * 3 Lucid Crystals
 * 1 Serenity Crystal

Trivia

 * After passing the Door to the Final Battle in Kingdom Hearts II, all power and magic boosts are negated.
 * Increasing Sora's strength increases the damage of Goofy's limits and Genie's Valor limit.