Toad Man is one of eight Robot Masters in Mega Man 4 for the NES. His main weapon is the Rain Flush, and his weakness is the Drill Bomb of Drill Man.
He is an agricultural Robot Master that was created by Doctor Mikhail Cossack for irrigation of crops during periods of drought. When Dr. Wily forced Dr. Cossack to fight against Mega Man in Mega Man 4, Toad Man was modified for combat. His Special Weapon, the Rain Flush, is an unavoidable attack based on his original rain-making technology, that can summon deadly acid rain to a wide area.