I have to say that's a really good project, you're doing a great job. The only thing is that in my opinion fakes have to seem a little bit more as a Nintendo pokémon. I mean, for example, the starters use to have a bigger head. I would do the grass starter such as this:
Here the head is bigger and the body is smaller, that makes that the starter seems more "cute" or "fancy", do you know what I mean?
offtopic: you should try to speak in spanish. It's hard, but the thing is to open doors to new public, and in English is more difficult for our community and it could damage your public ratio, it's just an advice ;D