Biologically speaking, are there any Pokémon that could actually exist in our world? Of course they wouldn't have their elemental powers and would be just normal animals, but i'm not talking about their powers, i'm talking about the Pokémon themselves, like, if they could share a common ancestor with other animals and serve a purpose in nature. Obviously most of the Normal/Flying bird first stages could exist in the real world, with Pidgey being in the order Passeriformes and Spearow being in the order Accipitriformes, for example. Any others?