Some of the sprites are pretty good. Your trainers are excellent.
There's a few that look kinda odd though. oO;; Mainly because some are saved in jpeg, and that some are outlined odd. ^^;
The dark mew is cool, but you need to make the outlining not pink. It really looks odd that way. If you used pure black, you can always make the other shades a tad lighter. ^^
Overall, some are really cool, some are pretty random, and a select few could use some improvement. ^^; Good luck with later sprites. ^^