I love your sprites! The Angelic Pokemon palletes are very well contrasted and not too much improvement is needed. Though it's my own opinion, I kinda think the wings on wartortle's back is sort of misplaced, :\ the wings seem to be growing right out of the shell and maybe placing it a little bit higher and near the shoulders would work better, but if that's the effect you wanted, never mind what I say! :D
Your Shadow pokemon are also exhibited perfectly, the colour matches straight to the tilt and a bright colour brings out the fact that the pokemon is very dark.
The revamps have a solid outer line, which is good and the shading is done well. I'm not too great on revamps, so I can't say much. :)
Your fusion is splendid, the detail is attached to the sprite perfectly and enhances the image. To me, the flames are a bit awkward and are crowded together too much on the side instead of the middle, which I think was the original place to put flames.
All in all, your sprites are great and I love your work. I'm not much of a spriter and only tweek things around a bit at times so I think your sprites are magnificent!