Aerodactyl is a pterosaurian, bipedal Pokémon with several draconic features. It has large, membranous wings, as well as small, sharply pointed ears, narrow eyes, a ridged snout, a gaping mouth, and a strong lower jaw full of serrated fangs. Its body is covered in light blue-grey skin with violet wing membranes. Aerodactyl's wings consist of a membrane running from the side of the body to the tip of an elongated finger. The clawed hands at the end of each wing allow it to grasp objects. There is a hump-like ridge with a spike on its back, and it has a strong tail with an arrow-shaped tip. Its talon-like feet have two toes in front and one in the back and are capable of scooping up and tightly clutching its prey in flight.
Aerodactyl's serrated fangs and ferocious attitude were nevertheless very imposing, and it is said to be have been capable of effortlessly ripping out enemies' throats. These fangs can also tear through any skin of a Pokémon to pieces, especially Steel-type Pokémon. By spreading its wings, Aerodactyl is believed to have flown by gliding through the skies, freely letting out its high-pitched cries. It liked to nest in the mountains, where it enjoyed both safety and seclusion.
As Mega Aerodactyl, its eyes turn green and the body begins to turn to stone, which some researchers believe was its original appearance before fossilization. It grows larger in size and sprouts jagged black spikes all over its body: five spikes at the wrist joint of each wing replacing its hands, three small spikes along its tail, one spike on each ear, and a long spike on its chin. The spike on its back and its rear talons have also become black and stony. Rocky plates cover its eyebrows and the corners of its jaw. Similar stone ornaments are present on its chest on its torso: two small ridges flanking a longer ridge. Because of the burden of Mega Evolution, Mega Aerodactyl is fiercer and more irritable than before. As a result, Mega Aerodactyl attacks anything that moves.
