AAAAAAAHHHHHH! Sonic Boom Amy! I can't wait for that game and show. *clears throat* Please excuse my fan girling.
On to the actual art. You did a very nice job with your shading and creating Amy's form. It really adds to a picture when the subject has a accented figure which you did a very nice job of. I also like how you used the slightly faded colours. They add to the initial sweetness of Amy's character that hides beneath this new hardcore look. Her eyes, well, what can I say, they're beautifully highlighted and just generally pretty to look at. Very nice job.