Mega Water S (メガウォーターＳ Mega Wōtā S?) is an amphibian Robot Master from Mega Man: The Wily Wars with a kappa appearance. He is based on the river sprite Sha Wujing, a character from the Chinese novel Journey to the West. He is the smartest of the three members of the Genesis Unit and is in charge of brain labor, but lacks confidence in himself. He has antipathy towards Buster Rod G.