I guess with the metal edit I meant more that the shading should not always fade from one color to the next, but rather you'll sometimes have your highlight and your shadow colors right next to eachother. I did a quick edit to fix a couple of things.
*1: I did my best to give him a little more perspective. I find it odd that his feet looked like you were seeing them head-on, while his body was angled slightly more, and his head was starting straight at you (again, head-on). I angled his eyes farther down and made his legs appear slightly more angled with the body (mostly made the actual leg shorter and angled the foot itself. Also notice how I implied that his feet were slightly apart with the shading, even though in terms of shape they're the exact same. Food for thought
). I didn't mess with his hair, because I'm no good at hair and I would only screw it up, but it would probably help the perspective a bit if you adjusted it to be more in tune with the rest of his proportions.
*2: I tried to give an example of the shading I was talking about, and cleaned up your palette of colors a little bit. The hair is still very full of colors, where you only really need 3 or 4 (I also took away that bare midriff of his, since it makes no sense to go into battle with your stomach exposed like that, but that's just a personal tick and has nothing to do with your spriting).
It's not the best edit ever, but I hope it helps you out.
EDIT: I just realized why he looks so dumb; I inadvertently removed the absolutely ridiculous amount of shadow under his hair. Feel free to keep that in your version, it helps the perspective. But if there's any way you can simplify the amount of colors involved there, go ahead and do so.