If you're curious what the one with the weird shading is about - for Little Runt, part of the style is mixing airbrush shading with the more obvious cel shading. The airbrush shading is very soft and not very visible (I turn the opacity way down after adding it), but it does make a difference! It helps add a little volume and make the lighting glow a little. :3
I also add it for the backgrounds as well!