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, just like other Devils. Unlike the other Devils, when going across the screen, his top two layers will bounce since they are too high up to hit (Dark Moon is 5 blocks tall). Dark Moon is weak to Photon Missile, but as it takes some time to fly, it's recommended to use it near Dark Moon's eye or use the Mega Arm. Through use of this strategy, it is possible to hit Dark Moon twice in one pass, a rarity among Devils.

Other Media
In the Megaman Gigamix series, Dark Moon appears as a moon summoned by Terra to feed off the hope and despair of the people, steadily growing larger in the process. After Terra's defeat, Dark Moon opens up, revealing itself to be the incubator for Sunstar.

Trivia

 * The Dark Moon of Rockman Gigamix bears a very strong resemblance to Ra Moon, which also has a Devil called New Yellow Devil.