Thunder Boost

Thunder Boost (サンダーアップ) is an ability introduced in Kingdom Hearts Chain of Memories. It increases the damage the user inflicts with -based attacks. It can be multi-installed to increase its effects.

Mechanics
In Kingdom Hearts Chain of Memories, Thunder Boost is an enemy card effect that costs 20 CP to add to the deck and lasts for one reload.

In Kingdom Hearts II, Thunder Boost is a that requires 5  to equip.

In Kingdom Hearts Birth by Sleep, Thunder Boost is a that can be installed up to three times.

In Kingdom Hearts 3D: Dream Drop Distance, Thunder Boost is a that can be installed up to three times.

In Kingdom Hearts III, Thunder Boost is a that requires 4  to equip. It boosts Thunder-type damage by 20%.

Kingdom Hearts Chain of Memories

 * The Yellow Opera enemy card has Thunder Boost as its effect.
 * The Black Fungus enemy card can randomly activate Thunder Boost.
 * The Darkside enemy card can mimic an enemy's Thunder Boost.

Kingdom Hearts II

 * Sora learns Thunder Boost at level 41 with the Dream Rod, 53 with the Dream Sword, and 99 with the Dream Shield.
 * Donald learns Thunder Boost after freezing the computers at the Dataspace.
 * Jack Skellington has Thunder Boost as a default ability.
 * Tron learns Thunder Boost after downloading the MCP-killer program
 * The Photon Debugger has Thunder Boost as its Equipment Ability.

Kingdom Hearts II Final Mix

 * Sora learns Thunder Boost at level 41 with the Dream Rod, 53 with the Dream Sword, and 99 with the Dream Shield.
 * Donald learns Thunder Boost after freezing the computers at the Dataspace.
 * Jack Skellington has Thunder Boost as a default ability.
 * Tron learns Thunder Boost after downloading the MCP-killer program
 * The Photon Debugger has Thunder Boost as its Equipment Ability.
 * The Meteor Staff has Thunder Boost as its Equipment Ability.
 * The Shock Charm+ has Thunder Boost as its Equipment Ability.

Kingdom Hearts Birth by Sleep

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

Kingdom Hearts 3D: Dream Drop Distance

 * Sora and Riku can purchase Thunder Boost from the Cyber Yog Ability Link for 30, 50, and 100 Link Points.
 * Sora and Riku can purchase Thunder Boost from the Necho Cat Ability Link for 30, 50, and 100 Link Points.
 * Sora and Riku can purchase Thunder Boost from the Thunderaffe Ability Link for 30, 50, and 100 Link Points.
 * Sora and Riku can purchase Thunder Boost from the Lord Kyroo Ability Link for 30 and 50 Link Points.
 * Sora and Riku can purchase Thunder Boost from the Peepsta Hoo Ability Link for 30 and 50 Link Points.
 * Sora and Riku can purchase Thunder Boost from the Sudo Neku Ability Link for 30 and 50 Link Points.
 * Sora and Riku can purchase Thunder Boost from the Electricorn Ability Link for 30 Link Points.
 * Sora and Riku can purchase Thunder Boost from the Frootz Cat Ability Link for 30 Link Points.

Kingdom Hearts III

 * Sora learns Thunder Boost at level 34 with the Power of the Warrior or Power of the Mystic, and level 40 with the Power of the Guardian.
 * Donald learns Thunder Boost after defeating the enemies in the electrified room on the Second Floor.
 * The Phantom Green has Thunder Boost as its equipment ability.
 * The Astrolabe has Thunder Boost as its equipment ability.
 * The Astrolabe+ has Thunder Boost as its equipment ability.
 * The Star Medal has Thunder Boost as its equipment ability.
 * The Thunder Cufflink has Thunder Boost as its equipment ability.
 * The Celestriad has Thunder Boost as its equipment ability.