Critique needed for improvement.

[SGEzlo]

Here's a sprite I made a long time ago. I would like to know where I can improve on.

[Curly]

There are a lot of unnecesary colors, a lot of banding and some pillow shading. Check this tutorial
The face is ok.

[SGEzlo]

There are a lot of unnecesary colors, a lot of banding and some pillow shading. Check this tutorial
The face is ok.

Here's a slightly edited version. I want to keep the black outline to make it cel-shaded. Tell me if there's anything I should fix if any.

[Macattackk]

Think about where your light source is coming from and shade each object appropriately. You have some parts where the light source is coming directly from the viewer and other parts where its coming from above.

[SGEzlo]

Here's the revised version. If I can have some suggestions for the color on the coat, that be great. I need some better colors than the ones I'm using.