EXP Boost

EXP Boost (EXPアップ) also called Experience Boost (EXPチャンス), is an ability that is found in Kingdom Hearts II, Kingdom Hearts 358/2 Days, Kingdom Hearts Re:coded, and Kingdom Hearts 3D: Dream Drop Distance. It increases the amount of experience received by the user, sometimes under certain restrictions, after defeating enemies.

Kingdom Hearts 358/2 Days
In Kingdom Hearts 358/2 Days, EXP Boost is an equipment ability that can be obtained by equipping certain rings to panels. EXP Boost is listed as "EXP Boost LV1", "EXP Boost LV2", or "Hi-EXP Boost", depending on which ring is equipped.

EXP Boost LV1 (EXPアップLV1), which increases experience gained by 10%, can be found on Knight's Defense, Might Crown, and Three Stars.

EXP Boost LV2 (EXPアップLV2), which increases experience gained by 20%, can be found on Double Up and Princess's Crown.

Hi-EXP Boost (EXPハイアップ), which doubles the experience gained, can be found on Extreme.

Kingdom Hearts Re:coded
In Kingdom Hearts Re:coded, EXP Boost is an Overclock ability obtained by unlocking Oathkeeper's final upgrade OathKeeper:Heart, and filling the Clock Gauge to its level MAX Clock ability. It allows Data-Sora to receive more EXP then normal until the Clock Gauge runs out.

Kingdom Hearts II
In Kingdom Hearts II and Kingdom Hearts II Final Mix, Experience Boost is a Support Ability and an Equipment Ability attached to Gullwing, and at level 7 with the Dream Rod, level 9 with the Dream Sword, and level 17 with the Dream Shield. It doubles EXP earned when Sora is below 50% HP. When two are equipped, it will quadruple Sora's earned experience below 50% HP.

Kingdom Hearts: Dream Drop Distance
In Kingdom Hearts 3D: Dream Drop Distance and Kingdom Hearts Dream Drop Distance HD, EXP Boost is a Support Ability that can be obtained by Sora and Riku. It is obtained from a 300 LP ability link from certain Dream Eaters. It can be unlocked by Keeba Tiger after linking with it five times for 300 LP total. It can be unlocked by Drill Syre after linking with it five times for 310 LP total. It can be unlocked by Cera Terror after linking with it three times for 490 LP total.