Starllow w00t!
Starly+Swellow
RATE PLZ!
Thank you Rana Rocket!I'll use these tips.
To be honest, it's really not good at all. You should probably read up on spriting techniques and practise quite a bit more, no offense.
For starters, the Starly's head looks really out of place, it's just sitting there on top of Swellow's body, which is something you should avoid. There's also a large chunk of outline missing on the right side of its head (our left), which could easily be patched up. You should add some shading to make the head look like it's actually attached to the body.
While I'm on the topic of shading, the body has very little of it, you've basically gotten rid of several colours important to the sprite's overall quality and making it look rather flat. Aside from that, the green you've used between the base green of the wing and the grey on the body doesn't seem to fit in, it's far too light. When two shades of colour are that different, they should very rarely, if ever, be placed that close to each other, especially in spriting. I recommend selecting the darker green and going to "Color > Edit Colors" and changing the shade through that if you can't find the shade you want.
Now, on to the recolouring. It looks like you've made minimal effort to match the shading between the head and the body, like I mentioned earlier, it's all one shade and looks flat. Instead of just using one colour from the Starly, you should replace the lightest shade with the lightest shade, medium shade with the medium shade, etc. Also, In the process of recolouring you seem to have lost the outline of the body completely, which can never be a good thing, but you should be able to fix that easily enough.
Sorry if you think I'm being too harsh, I'm just trying to help you improve.
Anyway, I don't give number ratings on sprites, but I think what I've said should help you improve. For starters, I recommend looking up some guides to help you with the shading, since it's probably the most important thing.