Ohmygod! These are too scary too be pokemon!! Are you joking?!
Lulz, just keddeng bout that. Really tho, You could tone it down a little.. if you think about it this way, It almost looks like from start to finish all thats happeneing is the little doll is slowly exploding outward with fire bursting out of it in every direction. And I really does look like his skins splitting and shredding apart. Shudder.
As far as crit, everything's way too busy. Too many small pieces. Look at the last sprite. Find me any pokemon sprite that has half as many seperate pieces as that one. Even a third. I don't think there are any. The fire is really.. pretty much bad.. on all of them. There's a nifty fire tutorial floating around the forums... It could be in the tutorial thread, I'm not sure. But really, all you gotta do is zoom way in on a Charmamnder's tail to see how fire's made to look good. All the tiny pieces on the last evolution that are only 1 pixel of red, supposed to look like fire spray? Not needed. Makes it very messy. And all in all, this doesn't look like a starter. Ghost starter would be very improbable due to all the starters being cute looking at frist ten looking cool. cool tho, not scary :\
I'm glad you're trying, and I'm not just tryin to bash you. Keep it up, I'm sure you can Improve.
EDIT: I also noticed that basically allll of the the pieces of fire on the last sprite are very awkwardly shaped and placed. they should form flame-shapes, and make up a central design.