Wow.
This is pretty kickass-tastic. I'm having trouble finding points of criticism, but not saying something would be unlike me.
The eyes seem a bit lifeless; they could use a little more clarity to the pupils
The outlines are strange; it seems to be a darker colored version of the base color for that specific area. I like it; its different, but it also seems to screw with my eyes a little bit, and takes away from the contrast that I believe it needs. I know its a light hearted pic, with light, happy colors, but some darker tones, at least for the outlines would make it look a lot better. While I can appreciate the deviation from the normal black outline, sometimes it's a must. In this case, it's a great idea; just not for this picture, in my honest opinion. The anatomy is very nice, everything flows together smoothly, and if I didn't know any better, it almost looks like a promo for one of the myriad of RPG titles on the PS2

Job well done, by and by.