Water Boost (ファイアアップ, Wōta Appu?, lit. "Water Up") is an ability that appears in Kingdom Hearts 3D: Dream Drop Distance and Kingdom Hearts III. It increases the damage the user inflicts with Water-based attacks. It can be multi-installed to increase its effects.
In Kingdom Hearts 3D: Dream Drop Distance, Water Boost is a stats ability that can be equipped up to three times.
Learning Water Boost
Kingdom Hearts 3D: Dream Drop Distance
Kingdom Hearts III