Delicious Wonderbros

[Sol]

Ya know, it doesn't actually look half bad, though a couple of things need fixing.

When it comes to the hair, I'd suggest making the outline less detailed, cause the way you made it now it looks all jagged and kinda sloppy. As for the shading, you got the amount of colors right, but the shading style is somewhat off, and it ends up looking a bit pillowshaded (in my opinion, at least).
The palette seems fine to me but then I'm not much of an expert at saturated palettes, so you'll have to wait for 1up to tell you if it's ok. I did however notice that you have two colors that are almost exactly the same. The darkest shade of green. You have one color on the hair and one on the shirt. Then again maybe that was intentional?
Now one last thing I noticed, as with many other sprites in this thread, your character seems to have developed a bit of an air hump. I'd suggest straightening out his left (our right) leg a bit.

(This ended up being a lot longer than I thought it'd be, haha)

Thanks for the critique! I see what you mean about the jaggedness and shading of the hair. I tried looking at the hair of the sprites you guys made as reference for it, but to be honest my avatar's hairstyle is kind of strange and I didn't really know where to go with the shading, haha. As for the green palette, yeah, it is the same all around, except for the highlights on the pants. My avatar sports green like crazy. And I seem to have took some of those posts about airhump seriously and thought it was a deliberate style trait, eheh. I'll fix that.