Ok.
The 6\10 is mostly for effort, but I do have to commend you on doing this frame-by-frame. The story was strange, giving an overall impression of being made by someone who doesn't know an awful lot about the series, but it really wasn't that bad, being simple and straightforward. Not always a bad thing.
Some lines are a bit silly, and I love how in one part, Megaman (X , by the way, I don't seem to recall him ever being referred to by that name) teleports up when there's a ladder right there. Your choice of villan is odd, him being treated as just suddenly being the big evil bad guy when he was originally just a grunt, plus he was destroyed prior to the X series. This is mostly fine, though seeing Vile working for fricking Gemini Man made me die a little inside. Characters swearing is a bit odd, but it makes sense and is a lot more realistic than the regular series dialogue. Plus X doesn't whine!!!
The animation is impressive for an early effort using FBF, but the fights can be a little slow and simple, plus Zero's saber keeps being frozen mid-swing, with motion lines everywhere.
I would prefer it if there were some sound effects. Just a couple of swings, explosions, etc from the games.
Overall this is quite a decent animation. I wish I had something else to add to that but I got nothing. Also, to the guy below me, 'fighting sensces?!' OHKY ANMIATON SILY DIAHLOG SLW FITS NO SOWND EFACFTS WHY SWREWERENG?!