It's a good beginning, but it doesn't quite look complete yet.
My main problem is with the outlining, which is primarily black. I am no master of outlining, I admit, but maybe adding some other shades to the outline would make it look better.
You may also want to work on the hand holding the Pokeball. It looks like the Pokeball is an extension of her arm, since a hand isn't very visible. Perhaps looking at the D/P trainer sprites would help you to get an idea of how to better sprite a hand holding a Pokeball.
Depite my suggestions, your sprite really is not bad. It has a lot of potential, and if improved, I think it will look really good. ^_^ Remember, in my opinion at least, Trainer sprites are some of the most difficult ones to scratch. I alwys have a hard time on them. You've made it this far, through the hardest part of getting an outline, and it only needs a few adjustments to be great. =)