Did this painting of Mega Man for Udon's Mega Man Tribute book awhile ago. Turns out it made it into the book. Stoked!
Megaman X was my primary reference for the armor, but then I made some modification to really emphasize his robot/machine aspects.
The Mega Man Tribute book will be premiering at the San Diego Comic-con at the UDON booth (#5037), July 20-24.
More info on the book "here"