Ok, time to get everything straight here, because I’ve researched the history & links to these games meticulously. (These are MY OPINION from the resaearch I’ve done.)
First with Megaman:
X is Megaman, Megaman is X. Period.
After the events of RM9 (Rockman & Forte, released in the SNES at around 92), Wily was nowhere to be seen, because of this, Dr. right decided now is the time to complete his ‘X’ project. Megaman was the beta of the ‘new kind of robot’, capable to make his own decisions, to have his own mind. During the Wily Wars (RM1-4) Right was too busy helping with Rockman’s upgrades for any real progress in the ‘X’ Project. Slowly he completed portions of it. After the time of peace, Rockman was upgraded & studied by Dr. Right. He became very old, & thus could not continue his research. Thus Dr. Right sealed the completed Project X while the capsule tested his systems as he was testing them. His research was supposed to be completed in 30 years. Then Rockman X would be fully reliable and his abilities fully tested. Around 100 years later, Professor Cain was at an archeological dig, and a cave-in occured, in front of him was a capsule, with a robot inside. He took it with him to his laboatory, and after studying it, opened it & found the message left by Dr. Right. X’s systems were fully functional & it appeared that he was indeed reliable, then Dr. Cain decided to use X’s designs to create a whole new generation of robots…the Reploids. It stands for Android Replica. Mavericks did not rise out of this yet, and everything seemed to be going perfectly fine. The Armor upgrades for X are the same capsules everytime, they develop new data & parts for X in case his power is needed again to save the world…or destroy it.
(It’s what Right meant in the warning…if X ever wanted to destroy/take over the world, all he would have to do is find the Capsules…which move all by themselves, and have Rights data within them, and use the data and parts to be a weapon like the world has never seen)
It is rumored that while the X project was Right’s greatest work, Wily created the Zero system and the Zero virus. The Zero system was was gave Bass his unique abilities. (Forte was a beta of Zero, in my belief.) After Wily’s dissapearance, he was indeed not dead, but very close to, so he sealed his mind into a digital form, and placed the Zero Virus, the Zero system (Forte), & all his data within a capsule and sealed it, allowing for the Zero System & Zero Virus to become one. Eventually, the capsule would open automatically & Zero would be able to take the world in Wily’s name. Apparently the effect of the Zero Virus on ‘Zero’ had caused him to become wild and violent. Sometime after the Reploid Defence Army (Later they came to call themselves the ‘Repliforce’) was formed by reploids to protect humans (like police), Leutenant Sigma was ordered to investigate a strange cave-in. Apparently anyone sent to investigate never returned. Sigma investigated & found a severely damaged Zero. In this battle, Sigma was infected with the Zero virus. Zero, due to the high amount of damage he sustained, was found and rebuilt by Cain as a Reploid, thus explaining his memory loss. Sigma hadn’t been seen since the battle. Unlike X’s Armor upgrades, Zero evolves.
(Wily really did a job on that Zero system, over large periods of time, Zero’s appearance will change, as he will evolve to confront new enemies. Examples of this would be all over the Megaman Zero series.)
There, hope this clears up a few things. Any questions, I’ll see if I can answer them.
Vile is a Reploid, he was created after through X’s design, as all Reploids are. Vile hasn’t been really explained much in any of the series, but he does seem to have some connection with Dynamo, in the fact that they’re mercenaries & seem to come back all by themselves. I have no clue about Blues at all…but if he is Prometheus, it wouldn’t surprise me. Oh, the dog reploid you battle before Sigma in the first X game…doesn’t it look a lil like Treble?