Bubble Splash

Bubble Splash (バブルスプラッシュ) is the weapon that X obtains from Bubble Crab in Mega Man X2. This weapon fires a stream of bubbles that float in an upwards arc for a moment before bursting. The amount of bubbles generated in the stream depends on how long the player presses the FIRE button: up to seven bubbles can be generated in a single stream when the button is pressed one time long enough, and a minimum of one or two bubbles will be generated if the button is pressed lightly. This weapon will continue to fire if the weapon button is held down, including during charging. When fully charged, X is surrounded by a ring of bubbles that can be used as a "shield" to damage enemies.The behavior of Bubble Splash changes when used in or on water: When X fires this weapon underwater, the bubbles will rise up much quicker than if they were fired normally; when charged, the ring of bubbles will allow X to jump incredibly high when underwater. A charged Bubble Splash will also even give X the ability to "jump on" water by pressing the JUMP button on the water's surface.

Bubble Splash is Flame Stag and Violen's weakness. 

Damage Data Chart
Known damage values in units for Mega Man X2.

Screenshots
