The variations between black and purple in the outline are a bit strange. There are places that seem like they should be in black, but are in purple, and vice-versa. The outline near the base of the tail bothers me. I think it's a little too dark, and it makes it kinda confusing where the tail is. From our perspective, is it in the front or back? The upper outline of the tail seems to show it coming from the front, while the lower outline seems to be cutting it off, as if it were coming from behind it. Also, I don't like that black outline on the head. The one near the base of the front ear.
This one is very nice, but there are still a few problems. The most noticeable, to me, is the skin around the eye. That outline on the right side there looks bumpy. Same thing with the bottom of the tail, and, to a lesser extent, the tail spike. It's shaded beautifully, though, especially the mouth and feet.