Platformer Style Ninja

[Valentine]

Here's a small ninja guy I made, with obvious similarities to a SNES astro-boy sprite. As you can see there are meant to be two versions of him - a blue and a red. I have tried changing the colour of just his headband, belt and shoes, and of his whole suit. Which do you think is better? Is there any other variation I could use which you think works better?

Does anyone have any ideas how I can improve him? I want him to stay the same size, but any other help would be greatly appreciated.

[Medical Waste]

You could add shading to the face and neck, highlights in the hair, and take away any black outlines. I don't know about the colour scheme, just make it whatever you think works best for what you are doing.

[Valentine]

Well there are already no black outlines, unless you'd count the shoes, but thats because the outlines are a darker tone of the interior grey. Hair highlights are a really could idea, I'll try that. I'm a bit unsure how I should go about shading, but I'll give that a shot too!

[sergiocornaga]

The stance seems a little strange... give him some sort of "ready for action" idle animation, bobbing up and down or something. And anger! Anger in his eyes!