Fire Man is a character from the Mega Man series. He is a fire-elemental Robot Master created by Dr. Light. Built to work in an incinerator in a waste management facility, he can wield flames that can reach 7000-8000 degrees. His Special Weapon is the Fire Storm, which allows him to launch waves of fire to his opponents.
In M.U.G.E.N, he was created by Eternaga and Laspacho for the Mega Man: Robot Master Mayhem M.U.G.E.N project. An edit was made by !E, but is pretty much the same as the Eternaga one.
Eternaga and Laspacho Fireman
This version of Fire Man can release a wave of fire from his cannon, and launch himself to the opponent inside a fire aura. His Hyper Combos are an enhanced version of that last move, and spinning while releasing fire from his arm cannons.
In terms of A.I., he is pretty difficult to beat because he tends to use the launching attack very often, but can be defeated like any other character.