>>36826983Aerodactyl evolved (in the Darwinian sense) into Charizard. Becoming a fire-type was a response to the development of steel-types in Charizard's environment, and Charmander/Charmeleon forms allowed Charizard to grow stronger during infancy/puberty as well as have a longer lifespan.
Kabutops slowly became Scyther as it moved onto land, losing its initial Kabuto form and in the last few million years developed Scizor as it's evolved form in order to adjust to a world ruled by humans and their steel contraptions.
