Serial Number: DWN-033
Designer: Dr. Wily
Weapon: Gravity Hold
Out of the Robot Masters from Mega Man 5, Gravity Man holds two special positions. Firstly, his design is probably one of the more unique out of the group (though Charge Man is easily the most ridiculously designed). In his boss fight, Gravity Man squats, jumps, and is generally more active than almost any other Robot Master in the NES games.
Of course, this is entirely undermined by the second reason I consider him special: he's by far the easiest Robot Master in the entire Mega Man Classic series. You can time your charged M-Buster shots to his movement pattern, and he practically throws himself into the line of fire. It's really rather pathetic.