Mega Man X forever:
Mini-chapter 2, The Discovery
Please disregard any inconsistencies with the actual story of Zero, this was not meant to be an exact follow up to the series.
Zero takes the Data disk in his hands and wonders where he can find a UDDD (ultra digital data disk) player. He has one idea, but it would be against the law. He would lose the few rights he has, but the information on the data disk could be revolutionary. He could still work in secret illegal demolition camps, and get paid in raw material. That would still work out. After weighing the benefits versus the downsides, he finally decides to do it. He must go to the Museum of Ancient Technologies, and get access to their player, he can only hope that it's still operational. So he goes to the museum, jumps on the roof, and breaks open the bars of the window. He puts the disk in and...(I originally was planning to end the chapter here, but I promised you that you would find out its contents, so…) A holographic projection of Doctor Light and his major accomplishes: Mega Man, a robotic dog named Rush, Mega Man X. It says he worked with Dr. Ultra, a great genius, to create Zero. It says under a list of future plans the name, of a plan with Dr. Ultra to create Ultra Man(sorry to Zero the Hunter, I made this before I found out that you had this name first, e-mail me if you mind me using it), a third version of Mega Man with X's personality chip, it has complicated plans to create a system that will work with adaptive technology similar to the one in Zero's design. This system took so much time to create, that only rough plans for the rest of him were made. Zero imparted all of this information into his memory and brimmed with hope and would-be tears. This means that there's still hope for Mega Man, Zero just needs the personality/memory chip…
Find out in Mini-Chapter3, The Creation