I think he did it in Photoshop.

Personally I prefer Graphics Gale because it's built for spriting.

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It looks nice, GLG. There seems to be some trend with inexperienced spriters these days to use a lot of 45 degree angles, why is that? Make your lines more natural. (side view) The Front and back views look good, however overall I think a much better palette could be used, and probably more values as a whole.

But I digress, it's quite good! I was expecting something a lot worse, you surprised me!

The hair in the back is quite exeptional, if you would keep that style up throughout the whole sheet it would be so much better.

(What's up with the arms? He looks like a robot! XD)