Proto Man's Castle

Proto Man's Castle, known as Blues Castle (プルース城) in Japan, is a fortress that appears in Mega Man 5 after the defeat of all eight Robot Masters. The castle consists of four parts, each part being a stage Mega Man must go through to save Dr. Light from Proto Man. Despite the name, it wasn't actually built by Proto Man, instead being built by Dr. Wily as a secondary base used by the four Dark Men, one of them being a Proto Man impostor created by Wily to frame Proto Man. In the last stage, the real Proto Man appeared and revealed that the other is an impostor.

Proto Man's Castle Bosses

 * Dark Man 1
 * Dark Man 2
 * Dark Man 3
 * Dark Man 4