Cell shading particles

I need a few cell shaded particle FX for a project. What are your ideas on how to accomplish cell shaded particle FX.

examples for instance are: Okami, the Naruto games, Madworld

I would like to know about your experiences creating particle FX for use with cell/toon shading.

What should I look at?
What should I avoid?
Are there any neat tips and tricks on how to make them with Unity?

cheers

Such thing as cell shading particles normally does not exist. its just a matter of using the cutout alpha shaders instead of blending and having corresponding art and talent

So there is no way of applying a outline to a group of particles? Or applying a type of hard shadow on a group of particles?
I understand that making with particle FX that are decal rendered without any additive properties could create sort of toony effect but I was just hoping someone did something more with it. Maybe there are certain tricks with blending modes which might be of interest. I was just wondering…