Wave Man is an aquatic Robot Master that uses a high-pressured water cannon known as the Water Shooter to eliminate his foes at a distance. However, due to his reliance on water, Wave Man is weak against Shark Man's Shark Boomerang. He is found on a tanker docked at some sort of loading platform.
Mega Man 3 PC/DOS - Wave Man Stage
Wave Man is obviously based on Air Man, as his appearance remains mostly unchanged, save for a darker shade of blue, the fan being replaced by water guns, a purple belt, and the top of his legs having a purple part. Also, his mugshot is an edit of Air Man's.