Megatron

Megatron was the Leader of the evil Decepticons. He turns into a cybetronian tank and a cybertronian plane. He is armed with a fusion cannon and was infused with the evil Dark energon that makes decepticons more stronger, faster and increase strength and defense but makes them more aggressive and evil while it makes Autobots sick and weaken them thus only Autobot doctors and medics can cure and deal with it. Megatron was killed by Prime but returns as a Ghost made out of Dark Energon.