"Proto-Type, Part One: Father and Son"
*The story of Mega Man’s long lost brother, Blues (a.k.a. Proto Man), starts here! What was it that drove a wedge between the first self-aware robot and the benevolent Dr. Light? *Source: archiecomics.com
*Then, in ‘Construction Derby,’ Guts Man gets some not-so-friendly competition in the form of Concrete Man. *Source: archiecomics.com
The secret file of failed Robot Masters - Orgami Man!
Collected in Mega Man Vol 5 TPB.