Okay, let's...slow down a bit. First thing's first: we've...really gotta fix the lineart on Shinx.
You are off to a great start: you mimicked the shading relatively well.

However, a lot of the line segments are very wonky and jagged. Since I'm not too great with explaining things, I will upload a GIF image that shows the main problem points. First, however, I will link you / quote a section in those threads I linked to that kinda explain jagged edges and basically how to round them off, for the most part.
Quote Originally Posted by Pixel Joint Forum
Jaggies:
Jaggies occur when a pixel or group of pixels are out of place, interrupting the flow of a line. Jaggies can also occur when a line lacks anti-aliasing. Jaggies get their name from the jagged lines that they create. More broadly, jaggies are the result of any bad pixel technique, but they are most often discussed in reference to line work, so that is the context in which they will be discussed here.

How to fix jaggies:

Changing the length of the lines



often times the problem is just that a segment of the line is too short or too long, and it creates an awkward jump. Using a more uniform length of pixels to smooth the transition is the solution here.
Some jagged lines cannot be helped, which is where anti-aliasing would need to be used, but I'll get into that at a later time.

More:
Quote Originally Posted by Pixel Joint


[^ shows at the bottom of the image, initial vs. cleaned up lineart]
Heh, sorry I'm using other sources to explain myself better. To be honest, that's the best way I know how to do things, is to, if possible, link to someone who has stated their point in better words than I could myself.

The main problem points are at both of Shinx's ears and its back leg, for the most part. Those are the two most prominent areas. c: Lemme know if I need to clarify something / elaborate / etc...or something! ^^;