Megatron

Megatron is very powerful and utterly ruthless. His imposing robot form is dominated by his primary weapon - his arm-mounted fusion cannon, capable of leveling a city block in one blast. During one episode of the first series, Megatron fell victim to his own weapon, when Autobot Brawn managed to get a hold of it and fired it at him. He can also sub-dimensionally link the weapon to a black hole,