Megatron (Transformers Film Series)

Megatron is the main antagonist in Transformers film series. He is the main antagonist of Transformers, secondary antagonist in Transformers: Revenge of the Fallen, secondary antagonist of Transformers: Dark of the Moon, secondary transformer antagonist/tertiary antagonist in Transformers: Age of Extinction and secondary antagonist of Transformers: The Last Knight (behind Quintessa). Megatron is the archenemy of Optimus Prime.