They are okay, however, a few don't seem too good.
Mainly the following: 11, 18, 101, 102, 105, 139, and 199.
11 is fused.
18 is just rather odd. The concept is okay, however, the sprite wasn't done well.
101 quite obviously uses parts from Quilava.
102, Typhlosion and the hue shifting doesn't work, plus is apparently absent of and shading.
105, wow! This is extremely obviously fused. Nidoqueen, Charizard, etc.
139 needs more contrast and see all above.
199, Lugia. That is all.
Now these are just the most obvious. On 53 get a unique pallette. About half of them are stiff and overuse dithering, usually at the same time. Only a few wow me. The quality is very inconsistant. If you are using the same style, even with different spriters, the quality should be the same. There a quite a few other not so good ones, but I'll take a lighter note.
37-41 are good Eeveelution subsitutes. 36 doesn't make a good sprite though. Personal favorites are: 68, 81, 89, 153, 172, and 180.
68: Texturing could be done better, but for Pokemon style it is nice. Good use of AA and hue shifting. I love the design.
81: Anatomy is done very well and the shading really defines the shape. Congrats to whoever made this.
89: Uses the limited pallette to his/her advantage. I love the way the lighting is portrayed on the holly.
153: This and 89 were obviously done by the same person. My very favorite of all 203. Once again the pallette is used nicely. The texturing really gives the feel that the wing and the body are very different even where they use the same colors. The pallette is very beautiful and eye-pleasing.
172: The pallette makes me happy. That and the pose is nice.
180: The highlighting is done well and the contrast is very nice. Hue shifts make this pallette nice.
Every one of the above has a great, dynamic, pose. Congratulations to whoever made the ones I showed above and help the one who made the beginning ones improve.