Dark Moon

Dark Moon (ダークムーン) is a devil type robot boss from Mega Man V. After the defeat of the first four Stardroids, Terra orders Dark Moon to destroy Mega Man to avenge his fallen comrades.

Dark Moon attacks by separating his body into parts that move one by one to the other side of the screen, and can only be damaged in the eye. Dark Moon is weak to Photon Missile, but as he takes some time to fly, he's recommended to use it near his eye or use the Mega Arm.

Trivia

 * Dark Moon's name is derived from the Moon.