Berserk (ability)

Berserk (バーサク) is an ability that appears in Kingdom Hearts, Kingdom Hearts: Chain of Memories, and Kingdom Hearts Birth by Sleep. It boosts the user's attack damage under certain circumstances.

Mechanics
In Kingdom Hearts, Berserk is a Common ability that boosts a character's attack power when their HP is critically low. The ability is especially effective when used together with weapon skills. It costs 1 AP to equip.

In Kingdom Hearts: Chain of Memories, Berserk is an enemy card effect that boosts the power of attack cards when HP is critically low. While Berserk is in effect, the player is resistant to fire and is stunned by ice. It costs 40 CP to equip and lasts for 30 attacks.

In Kingdom Hearts Birth by Sleep, Berserk is a Dimension Link ability that causes all normal attacks to be critical hits.

Kingdom Hearts

 * Sora learns Berserk at level 21 with the Dream Sword, 36 with the Dream Rod, or 48 with the Dream Shield.
 * Donald Duck learns Berserk at level 10.
 * Goofy learns Berserk at level 54.
 * Tarzan has Berserk as a default ability.
 * Beast has Berserk as a default ability.

Kingdom Hearts Final Mix

 * Sora learns Berserk at level 9 with the Dream Shield, 60 with the Dream Rod, or 78 with the Dream Sword.
 * Donald Duck learns Berserk at level 9.
 * Goofy learns Berserk at level 45.
 * Tarzan has Berserk as a default ability.
 * Beast has Berserk as a default ability.

Kingdom Hearts: Chain of Memories

 * The Hades enemy card has Berserk as its effect.
 * The Black Fungus enemy card can randomly activate Berserk.
 * The Darkside enemy card can mimic an enemy's Berserk.

Kingdom Hearts Birth by Sleep

 * The Zack Dimension Link has Berserk as its level 1 ability.

Origin
Berserk is a recurring status in the Final Fantasy series that increases the attack power and speed of the affected character, but makes them uncontrollable by the player and forces them to use only physical attacks.