This was a favor I did for someone as an avatar. The original concept art is not mines, and this was based off of a trace I made, but I think the pixel art is different enough to warrant a submission. I thought I had used a lot less colors, but I'm happy with the outcome. It was 22, then I dropped it down to 19 without any real visual loss, then I dropped it down to 17 strictly for pixel-art purpose as I think it faired well in the optimization. Meant to be on a white background.

Original stuff here: http://i37.tinypic.com/2elh9qq.png

I don't know who the artist is. If it's important I can find out, though.