Mega Goodra would be cool, Dragon/Poison typing or even Dragon/Normal (maybe it's the color of Goomy etc but it looks like it could be Normal type). They could give it a big shell on its back and extend the snail stalks or something.
Mega Hydreigon mite b cool, turn it into a proper Hydra and give it shit loads of heads. Maybe give it a unique Pin Missle-esque attack (one hit for every head).
>>22130998>Mega NoivernI really want them to add Sound as a type as well, could really spice up the Whismur line and some birds/bats. Mega Noivern, Dragon/Sound sounds pretty cool.