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.
- 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.
- Wave Man is weak to Shark Boomerang, but all other weapons in the game other than his own Water Shooter can do extra damage to him.
- Although Wave Man's stage is a tanker, he is fought in a small separate room underneath it.