Combo Master

Combo Master (コンボマスター) is an ability introduced in Kingdom Hearts II Final Mix. It allows the user to continue with an attack combo even if a hit does not strike an enemy or object.

Mechanics
In Kingdom Hearts Final Mix, Combo Master is a combat ability that costs 3 to equip.

In Kingdom Hearts II Final Mix, Combo Master is a that costs 4 AP to equip.

In Kingdom Hearts Re:coded, Combo Master is a Bonus Booster ability.

In Kingdom Hearts 3D: Dream Drop Distance, Combo Master is a that can be equipped once.

In Kingdom Hearts III, Combo Master is a that costs 4 AP to equip.

Kingdom Hearts Final Mix

 * Sora learns Combo Master at level 50 with the Dream Sword, 55 with the Dream Shield, and 55 with the Dream Rod.

Kingdom Hearts II Final Mix

 * Sora learns Combo Master after defeating Roxas in The World That Never Was.

Kingdom Hearts Re:coded

 * Data-Sora learns Combo Master by linking the CPU to the respective Bonus Booster in the fifth section of the Stat Matrix.

Kingdom Hearts 3D: Dream Drop Distance

 * Sora and Riku can purchase Combo Master from the Lord Kyroo Ability Link for 300 Link Points.
 * Sora and Riku can purchase Combo Master from the Ryu Dragon Ability Link for 300 Link Points.

Kingdom Hearts III

 * Sora learns Combo Master after filling the Laugh Gauge while battling Unversed on the Second Floor.
 * Riku has Combo Master as a default ability.
 * Aqua has Combo Master as a default ability.
 * Second Form has Combo Master as a form ability.
 * Guardian Form has Combo Master as a form ability.
 * Element Form has Combo Master as a form ability.
 * Strike Form has Combo Master as a form ability.
 * Blitz Form has Combo Master as a form ability.
 * Ultimate Form has Combo Master as a form ability.
 * Light Form has Combo Master as a form ability.
 * Dark Form has Combo Master as a form ability.
 * Double Form has Combo Master as a form ability.

Kingdom Hearts III Re Mind

 * Roxas has Combo Master as a default ability.
 * Kairi has Combo Master as a default ability.

Other appearances

 * In Kingdom Hearts, when Sora is standing in the water he can hit the water with a strike (or an air strike), counting as hitting an object and therefore allowing him to do two attacks without hitting anything, instead of just one. This feature is also present in Kingdom Hearts Final Mix, as well as in Kingdom Hearts HD 1.5 ReMIX.
 * In Kingdom Hearts 358/2 Days, combo chains are not reset by missed hits.
 * In Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-, combo chains are only reset by missed hits on Critical Mode.

Notes and references
Kombomeister