so how is he gonna improve if you guys tell him you don't like it?
You can oviously mix but you just didn't pick the right two. Try again and I know it could be better.
Yeah, as stated before it looks like you have some talent but you just didn't choose the right Pokemon to mix. Usually Pokemon with similar proportions are easier to mix...at least I think. xD
I thought that the first one was quite good actually, except for the black outline around the fin on its side. There could also be some anti-aliasing wgere the blue meets the white, and the yellow tail should be recolored.
I think the first one is probably my least favorite. Probably because of the 2 you picked and the checkered shading as some other people have said but your second batch is really good. I don't know why people aren't liking them and telling you to go places and get advice. If you opened a request thread i bet tons of people would come including me.