Proto Man, known as Blues (ブルース Burūsu?) in Japan, is the early prototype of Mega Man that made his first appearance in Mega Man 3, under the name of Break Man, to help train Mega Man by fighting him. Beyond their armor and personality, Proto Man and Mega Man are supposedly identical. At the end of Mega Man 2: The Power Fighters, it is revealed by Dr. Light that Proto Man's body has a fatal defect in his energy system, and as a result, is in great pain and has a more limited lifespan. He also appears in the "Navi Mode" of Mega Man 3 in the Mega Man Anniversary Collection to provide gameplay hints to Mega Man.