Serial Number: DLN-004
Designer: Dr. Light
Weapon: Super Arm
Easily one of the more famous Robot Masters in the series, Dr. Wily has based a lot of his designs on Guts Man, Guts Man G and Guts Tank being obvious examples. He was also one of the main antagonists in the cartoon, as he appeared in every episode.
His special weapon, the Super Arm, is notable for being one of the most crippled weapons in the series. Unlike the Top Spin (which is also popularly known as being the worst weapon ever), the Super Arm isn't bugged or hard to use. It's just that it only works when there are special blocks around for Mega Man to throw. If there aren't any blocks, then the weapon cannot be used. Making things worse, these blocks disappear after being thrown, greatly limiting how much you can do before you'll need to switch to another weapon.
Of course, the most notable thing about Guts Man is that out of all of the Robot Masters, he has the best ass.