psychokind wrote: 
that means there's a parallel storyline to megaman 1-1000 with X, X1, X2...?
Oh, geez, here we go..
<fanboy>The story starts with Mega Man 1 for NES. Dr. Light and Dr. Wily are working on a series of robots to help with difficult tasks such as working in extreme environments. However, after the first six robots were completed Dr. Wily had a change of heart, and decided to use the robots to conquer the world. Dr. Light's lab assistant Rock (or Mega) volunteered to be upgraded to be a fighting android so as to stop Dr. Wily's plans. The battle between Mega Man and Dr. Wily went on for years. As Dr. Light grew older, he began work on an upgraded model of Mega Man that would be a full robot, but would have free will and show compassion to humans. This Mega Man was known as "Project X" and though it was completed before Dr. Light's death, it was left unawakened long past his demise. Likewise, Dr. Wily also created an ultimate robot, known as "Zero". Many years later, after countless wars had ravaged the earth, Dr. Cain found X and used his data to create the Reploids. His ultimate creation was Sigma, who was deemed the most powerful robot ever built. Eventually, Zero awakened and, because he was built by Dr. Wily, immediately started wreaking havoc until he was finally stopped by Sigma. The program that had caused Zero to act so violently was mostly destroyed in the battle, but remnants of it found a new home in Sigma. This program became known as the Maverick Virus, and was the leading cause of rogue Reploids in the early Mega Man X games. Due to the outbreak of Mavericks, a special task force known as Maverick Hunters was created and was led by X and Zero.</fanboy>
That's essentially the set-up for Mega Man-Mega Man X. The story continues with Mega Man Zero, Mega Man ZX, and Mega Man Legends. However, there is debate on whether Mega Man X 6-8 should be considered canon.