EXP Zero

EXP Zero (EXPゼロ), also known as "Zero EXP" and "No Experience," is an ability introduced in Kingdom Hearts II Final Mix. It prevents the player from gaining EXP for as long as it is equipped.

This ability allows the player to complete the game without gaining EXP, and therefore staying at level 1, resulting in a more challenging play-through.

Mechanics
In Kingdom Hearts Final Mix, EXP Zero is a combat ability that costs 0 to equip.

In Kingdom Hearts II Final Mix, No Experience is a that costs 1 AP to equip.

In Kingdom Hearts Birth by Sleep, Zero EXP is a that can be equipped once.

In Kingdom Hearts 3D: Dream Drop Distance, EXP Zero is a that can be equipped once. However, this does not affect the experience gain for Sora or Riku's spirits in their party in anyway possible.

Kingdom Hearts Final Mix

 * Sora has EXP Zero initially in Final Mix: Proud Mode difficulty.

Kingdom Hearts II Final Mix

 * Roxas learns No Experience at the beginning of the Third Day in Critical Mode.
 * The Winner's Proof has No Experience as its Equipment Ability.

Kingdom Hearts Birth by Sleep

 * Zero EXP is attached to Terra's Sliding Dash, Ventus's Aero, and Aqua's Blizzard at the beginning of their stories in Critical Mode.

Kingdom Hearts 3D: Dream Drop Distance

 * Sora and Riku have EXP Zero initially in Proud Mode and Critical Mode.