I was looking on a website for MegaMan model kits a while back (more like a year ago.) and I saw an armor from X3 I hadn't seen in the game. It was a picture of a snarling X type, with turquoise/ greenish armor. I read further on it and said that it was called Return X and that it was a clone of X (i know, how the hell did that happen?). The picture on the website said that he was from X3, but never saw or even picked up hints of this guy in X3...How the hell did this guy get in the equation?
Just know that there are a TON of X armors that didn't appear in the games from comics and all that jargon. A lot of them... aren't great, either.