Hmmm, given the lack of pixel-perfect detail and that extremely large resolution, I don't see why you would choose to do this in pixel art. I mean, unless you seriously overhaul it, this could easily and more effectively be done in vector art... I'm not trying to offend, I really like the shape and the style, I just... well... ok I'm shutting up now. If it was handled a bit more traditionally, it would look like a Disgaea enemy.