Transformers ... Megatron had a sort of "cannon arm" made out of his beast mode head. Interestingly enough, his spark was housed in a "cockpit" that was a vestigial limb derived from an unused toy ...

While the Transformers ... while in Dark of the Moon, he is obliterated in seconds, quicker than his Decepticon lieutenants. Beast Wars put a unique spin on Megatron. He retains some more comical ...