"Megatron" may be referring to two or more different villains. If you're uncertain which one you're looking for, just flip a coin.
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Megatron's "Evergreen" design.

Megatron is the main antagonist of the Transformers franchise and the Arch-Enemy of Optimus Prime. Here are the incarnations of the ruthless Decepticon leader. Some of them become Galvatron, however some versions portray Galvatron and Megatron as separate entities.

See also

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