Right. Some good, some not so good. It would have been better if you were to introduce yourself. Are you a beginner at this? Blastbro says so.
Yup, that Blastoice/Slowbro is poor, I'm afraid. In my opinion, sticking the head of one Pokemon onto another isn't spriting, it's surgury. That blue does not suit the Shellder at all.
The Slorock/Voltorb is not too good either. Essentially what you did was replace one ball with another, which isn't good because the one you replaced was designed to go with those spikes.
Next up: the Togepi/Azurill. This one is so much better. The shell looks a little awkward around the feet and I don't see much of Togepi. It is a positive sign though as it shows greater ingenuity and complexity than the other two.
Finally, Kabutops/Aerodactly. This is a little too simple. All you have done here is add Kabutop's head and scythes. It has some flaws on the wings too. The white on the arm-like part of the wings looks wrong. Go for all white or all brown please. It doesn't look right otherwise. Also, the wing end poking out the top of the right wing behind the scythe looks wrong. I think it would be better without it.
Now for my verdict: for a beginner these fusions aren't bad, or at least the baby and fossil ones aren't. Do more like that and get in some practice. You will get better.
One more thing, say a little next time. Say hello and introduce what you've got. Addmittedly, I don't, but I hang around here quite a bit so it is a little different. Okay?