Jupiter is a Robot Master created by Dr. Wily. He was first seen in Mega Man V as one of the game's Eight Robot Master Stardroids. Jupiter has a jet pack in his back, allowing him to fly at fast speeds, and uses the Electric Shock as his Special Weapon. His design comes from a bird, and he has green armour.
Jupiter flies close to the top of the screen during his battle. He has two attacks: swooping down to attack with his talons and firing thunderbolts from his blaster. His weakness is the Bubble Bomb.