>>52978982restoration of fossils utilizes a technic which requires the use of a synthesized genes to fill in the gaps like Jurassic Park does. These genes were originally created from rock type pokemon, due to rock types having biological make up of living rocks/minerals. This however changes many fossil pokemon, making them hybrids, and in some cases cannot ever be fully restored. Aerodactyl being an oddity, as through mega evolution, it's genes are restored to its prime, which retains its rock type, so more research must be done if this is the true Aerodactyl, or if the modified genes are added onto the restored genes or not?