It looks quite interesting. I like it!
However, a few things: Number one, the way you drew it it looks like it's sideways. If you look in any official pokemon sprite, they're not facing sideways - they're facing forward, and as such a little bit of the other side of their body is visible. In the future I advise trying to alter your perspective so that your pokemon is pointed toward the bottom-left instead of just to the left. Try to put in more perspective. On that note, also experiment with angles a bit. For instance, Sabrago's back leg looks incredibly awkward and somewhat broken. Its foot is pointed at an unnatural angle, when logically it should just be on the ground.
Second, your lines. While they certainly aren't bad, some of them (especially on the head) seem to stiff and not curved enough. If you can, try to make future outlines a bit more curvy.
Third, shading. This actually looks quite good; however, you need more of it. Official pokemon sprites use up to 16 different colours in a palette; your sprite uses 7. You can add more shades of white for its teeth, some shades of grey for the inside of Sabrago's mouth, and most importantly, more gradualness on the torso fur. Instead of just going straight from light to dark, I'd suggest going (starting at the top and moving downwards) light, slightly darker, a bit dark, and then dark or shadowed in the chest area (on the opposite side from the light source.
In addition, have you read Butterfree's
spriting guide on the main site yet? If not, I highly suggest you do; it is quite comprehensive and it helped me a great deal when I was starting out.
Finally, if you attach images to a post, as you did, it's fine for forum members because we can see that no problem. But for any visitors who view the thread to see your work, they can't see the attached images. Instead, I recommend using a website like
ImageShack to upload your work to there and have them host it, and then use the button above where you type your message that looks like a picture to embed the image into your post somewhere.