Since I did a regular Aerodactyl I decided to do the Mega one as well. Orginal Model on RoeStudios, I went in thickened the wings slightly, and made it printable.
This one can be very tricky to print due to all of the sharp points. I went ahead and gave both a full version and one where I sliced it up for easier printing.
My picture I posted I printed it a little too small, as well as printing it at .25 resolution the wings didn't turn out the best. The one I uploaded is larger then the one I printed as well as printing at something like .15 or .2 will make your turn out better.
Good Luck, happy printing!
Legal
I do not claim ownership of the original model and belongs to The Pokémon Company.
These are just me changing the models in order to be 3D print friendly.