Counter Blast

Counter Blast (バリアクラッカー) is a technique that appears in Kingdom Hearts Birth by Sleep and Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-. It allows the user to counterattack after a block by shattering their barrier and send it flying into surrounding enemies.

Mechanics
In Kingdom Hearts Birth by Sleep, Counter Blast is a Reprisal command exclusive to Aqua that must be installed under a Barrier-type command. It is activated by pressing ( in the Japanese versions) after blocking. It has a maximum level of 4 and fills the Command Gauge by 40%.

In Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-, Counter Blast is a default ability that appears upon blocking.

Kingdom Hearts Birth by Sleep

 * Aqua can obtain Counter Blast from a chest in Fountain Court.
 * Aqua can purchase Counter Blast from the Command Shop for 1200 munny once six worlds are cleared or the command has already been obtained elsewhere.

Kingdom Hearts 0.2 Birth by Sleep -A fragmentary passage-
Aqua has Counter Blast as a default ability.