You are one hell of a spriter! These are just amazing. Better than Nintendo sprites, overall. All of your fakemon kick ass. Aerodactyl's prevo is adorable. And Dunsparce's evo is just the greatest thing ever. I've seen a lot of Dunsparce evos on DevArt, but yours takes the cake. Is it drgon-type?
Whoah...terrains. Just whoah.
Hunting Pokemon - great idea. Everyone loves exclusive Pokemon, right? Especially when they have awesome typing! (I think Nightmare Ponyta should be ghost/fire, though.)
So much for art and extra things. I can't wait to see the content. :) Your plot sounds pretty basic but not in a bad way, in fact it avoids being completely improbable the way a lot of them are.
Can I take one of the fakemons and make a support bar? The one you have just doesn't stand out from the rest, imho.
PS: Clean up your first post. It's super messy, everything is in capitals, and looking at the spoilers stretches the page. :P Make it look professional! Presentation can make all the difference.