Megatron

Megatron is a fictional character and the main antagonist of the Transformers media franchise produced by the American toy company Hasbro and the Japanese toy company Takara Tomy. He is the tyrannical leader of the Decepticons, a villainous faction of alien robots that seeks to conquer their home planet of Cybertron and the rest of the known universe, and serves as the archenemy of Optimus Prime, the leader of the rival Autobot faction. As with all Cybertronians, Megatron can disguise himself by transforming into vehicles or weapons. His alternate modes have included a Walther P38 handgun, a particle-beam weapon, a telescopic laser cannon, a Cybertronian jet,various tanks and a rusty,beat-up Mack Granite tanker truck depending on which continuity he is depicted in. His original designation, in some continuities, is D-16.

Megatron's most consistent origin portrays him as having risen up from being an oppressed worker to a gladiatorial champion who took the legendary name of one of the original Thirteen Primes—Megatronus—as his own. He shortened his name when he became a political revolutionary who attempted to reform Cybertron's corrupt governing body and called for an end to its decrepit caste system. As the mentor of the young Orion Pax, Megatron preached that freedom of self-determination was the right of all sentient beings. When Megatron grew corrupted by his power, Orion would utilize his teachings against him as Optimus Prime. In most incarnations, Megatron would eventually meet his demise at Optimus' hands, only to later be resurrected as Galvatron. Some continuities have Galvatron as a separate entity from Megatron, however.