If you actually want contributions from us, I suggest you update your OP pic with the suggestions so far. That's sure to generate more interest and keep the thread moving. Otherwise, this will die in a few posts.
I'd be interested in seeing a three stage regional bird that starts Normal/Flying and ends in a fast and deadly Water/Flying heron.
Also we need a single-stage Ground-type bulky horny toad Pokémon. With Rough Skin.
>>32119520 has good ideas too. 