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

 * Traverse Town - Yellow Trinity at the Mystical House.
 * Traverse Town - Mail 10 Postcards.
 * Olympus Coliseum - Complete the Hercules Cup in under three minutes.
 * Deep Jungle - Complete the Shadow Cavern course of Jungle Slider.
 * Agrabah - Green Trinity at the Storage Room.
 * Halloween Town - Guillotine Square.
 * Neverland - Clock Tower.
 * 100 Acre Wood - Tigger's Giant Pot, rare nut reward from Owl.
 * Hollow Bastion - Entrance Hall.
 * End of the World - Gate to the Dark x2.

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
Power Up can be synthesized once the fourth list is unlocked.
 * 5 Power Shard
 * 3 Power Gem
 * 1 Power Crystal
 * 1 Mystery Goo
 * 2 Orichalcum

Kingdom Hearts Final Mix
Power Up can be synthesized once the fifth set is unlocked.
 * 5 Spirit Shard
 * 3 Spirit Gem
 * 5 Power Shard
 * 3 Power Gem
 * 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.