Thanks for your feedback, i'll work on more fruits and change my posts to a single one with them, also thanks on your advice on dithering. 

Pokeballs are smooth, and at smaller sizes, dithering tends to look like texture instead of looking smooth. I recommend sticking to solid colours with no dithering when working small. Even when drawing textured objects, solid colours can be used to create more believable, less noisy texture than dithering. Dithering works best at large sizes, where the details are large enough that they're not much affected by the dithering pixels.

I also recommend not uploading a bunch of small sprites all separately. That clutters up your gallery and public queue, and makes it harder for people to give you non-nitpicky feedback. Plus, a lot of people are lazy and just won't click things (and therefore won't give feedback) if they feel they get the full experience just seeing the thumbnail in the g allery xP If you group related pieces (e.g. all your fruits), people can see them together and comment about recurring problems, and it keeps your gallery easy to navigate, and they can comment on a bunch of work all at once instead of likely getting lazy and only commenting on one thing.