"No More Heroes" Shader?

Heya,

I’ve been trying to find / code a shader similar to the one found in the GC game No More Heroes, however I have not had much luck on either front, I seem to be drawing a blank. I haven’t had much experience with shader coding, but looking at some examples, this really shouldn’t be too difficult and I seem to be over thinking it. Any pointer into the right direction to either code one or download one somewhere would be invaluable.

Edit: Sorry, I forgot to clarify that I refer to character shaders, the subtle comic book shadows and colors.

Thanks in advance!

What about this?

You can change the ramp texture.