First off I would like to tell you that this very adorable! I love Fluttershy as she is one of my favourites in the Mane Six. How you matched the pirate theme was very clever. I could just make out that Fluttershy is wearing a butterfly ear ring matching the one on her flank. The shading and technique you used is perfect and very neat and I loved the paints you've used. I know this is not much being my second critique and all. Also, I would like to wish you the best of luck to your future deviations. Keep at it!
Well this is going to be my first Critique ever on this so this should be interesting. XD
I really love how you thought up of a medic/nurse Fluttershy. She looks really cute as a nurse pony even though she might not be all that well at making ponies feel better than animals.
The only bad thins I have to say about this picture is that the needle she has near her hoof looks almost like a tatoo if it wasnt for the band around her leg. Also how would she get that off without cutting her arm all up and all of that. I dont know think I am being a bit too picky.
Overall very nice and creative picture of my favorite mane 6 character Fluttershy :3