It's hard to tell what it's supposed to be. I know it's some sort of robot, but it took me a while to figure out where everything was. The arms are too long and the head is too small. At first glance, especially at the top, it just looks like a bunch of jumbled pixels, but when I looked at it a bit longer, I'm like "Oh, that's a head." Work on making your art more distinguishable rather than just a dull figure.
Actually. I'm pretty sure this is Gallantmon from Digimon Season 3/various Digimon games. It's pretty nice, but as others have noted it's too hard to tell who it is and some of the sizing is off.
Hah, I didn't even notice that. Good catch. Maybe the last post time needs to be easier to notice, or, ya know... People could stop the extremely late and unnecessary replies <.<
The stance is quite odd, as for the shading it's quite messy, but nevertheless it looks nice.