Fire Boost

Fire Boost (ファイアアップ) is an ability that appears in Kingdom Hearts: Chain of Memories, Kingdom Hearts II, and Kingdom Hearts Birth by Sleep. It increases the damage done by Fire-based attacks. In Kingdom Hearts: Chain of Memories, "Fire Boost" is activated by the Red Nocturne card, costs 20 CP to add to your deck, and lasts for one reload, while in Kingdom Hearts II, it requires 3 AP to equip, and in Kingdom Hearts Birth by Sleep, up to three copies of it can be equipped.

Kingdom Hearts: Chain of Memories and Kingdom Hearts Re:Chain of Memories

 * The Red Nocturne card has "Fire Boost" as its ability.

Kingdom Hearts II

 * Sora learns Fire Boost at level 15 with the Dream Rod, 23 with the Dream Sword, and 33 with the Dream Shield.
 * Donald learns Fire Boost after defeating Scar.
 * Mulan learns Fire Boost after losing her disguise.
 * Jack Skellington has Fire Boost as a default ability.
 * The Bond of Flame has Fire Boost as its Equipment Ability.

Kingdom Hearts II Final Mix

 * Sora learns Fire Boost at level 15 with the Dream Rod, 23 with the Dream Sword, and 33 with the Dream Shield.
 * Donald learns Fire Boost after defeating Scar.
 * Mulan learns Fire Boost after losing her disguise.
 * Jack Skellington has Fire Boost as a default ability.
 * The Bond of Flame has Fire Boost as its Equipment Ability.
 * The Rising Dragon has Fire Boost as its Equipment Ability.

Kingdom Hearts Birth by Sleep

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