Pump Man

Pump Man (ポンプマン) is a Robot Master from Mega Man 10. He can create a shield of bubbles around himself and release them at several directions.

Pump Man worked at a wastewater treatment plant, purifying the water that comes through. He also volunteers his time to wash graffiti off of walls in the neighborhood. Pump Man has also been described as a "neat freak."

Strategy
Pump Man starts off by creating Water Shield. He then jumps around trying to tackle you. He eventually fires off his Water Shield.

On Easy Mode, Pump Man's Water Sheild ony has four bubbles instead of eight.

On Hard Mode, Pump Man has an extra attack in which he tosses his Pump Handle at you like a boomerang.

His weakness is Thunder Wool, as it can hit him multiple times, pierces, and destroys his shield, though make sure it's high enough he can't cancel it out.

Trivia

 * The reason for Pump man's weakness is because water conducts electrcity very well, hence his weakness.