Megatron

Megatron is a Decepticon, one of the lineal descendants of the military hardware robots created by the Quintessons on their factory world of Cybertron. 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, generating even more powerful antimatter blasts (capable of destroying a small planetary body). However, this ability is almost never used, as it leaves him extremely weak and vulnerable.