1. DO NOT SAVE AS JPEG!!!
2.the jirachi/mew pmd fusion is soso... it is very basic, and is a bit ugly in the coloration. It is hastily colored in the facial area, if it even is... and it kinda jagged along the outlines. you also messed up the symetrical shading that pmd sprites have.
3. meevee's tail is cut off, or else it is soso... the pink/blue color combo is not that appealing.
4.zigzavee is nicely done, i like how you kept that one basic compared to eevonite or totovee. eevonite is an ok fusion, the antenae are a bit awkward looking and seem misplaced. there is also some outline issues on the top of eevonite's head. same problems for totovee. it seems awkward with the red ridges, and is choppy on the head.
5. eevithe is another nicely done one.
6. BUT! the shading on all of them is awkward... example: their fur tufts have light spots on the far right... which makes no sense since the light is coming from the top left. Eevonite's wings are symetrical in shading...again, light source problems.
7. I like your cydena the most. for your first sprite, it is definitely your best! you did a good job blending body parts, recoloring, shading and outlining. not to mention it is innovative enough that it's something i have never seen before. I like it! Good job.
Keep up the hard work. Take my critism and better your self, dont get upset over it. You're not bad at all for your first stuff.
Keep Spriting!