I have a theory: Mega Man x is a Fusion of Bass and Mega Man.......................just look at bass and x side by side............................Mystery Solved.
The gaps between MMX, MM zero, MM ZX, and MM Legends have all been explained.......... Tell us what happened to the originals already man. You know they existed because Light, Wily, and Cut Man have all appeared in the X series so come on Capcom.