Played around a bit with toonshading.
But first for something completely non toon shading i build along the way:

no shader


carpaint-/metalshader



Now for the toon stuff
I had a look at the naruto game again and tried to come as close to it as possible. I think this could be it:



And the same thing with rim lighting for those mechas out there



(I DID NOT CREATE THOSE MODELS! They were taken from 3dxtras and turbosquid)

So what do you think mpdeveloper_B, is this it? I guess with the right art you could create the same style as shown in the naruto game

[edit] hmmm...i just thought of adding some kind of normalmapping to the toonshader to get a little extra detail without loosing the toon look...let's see how this turns out...