As the above poster said, he looks a bit skinny.
Is that his tail behind him? It's way too big, and it's the wrong shape. Look at the Sugimori art or an anime picture for reference when making the shape of custom sprites.
His eye should not be solid red and white. You could give it a little shading if you want, but it's not necessary. However, you need to give it a black part for a pupil.
His legs also look a bit big compared to the rest of his body, but that might fix itself if you make him fatter.
Certainly not bad, but you should work a bit more on your lineart before you shade.