Megatron II

Megatron II was a clone of Megatron created by Straxus to serve as his new body, and replace the original. However, this Megatron would believe that he was the real Megatron, and and was a major antagonist of Marvel's the Transformers UK comics.

Trivia

 * Originally, this Megatron was supposed to be the original Megatron, and was written as such. However, to keep in continuity with the US comics, Megatron was retconned into being a clone.
 * Given that Galvatron can remember events from this Megatron's perspective, it is possible that, in his timeline, he was created from this Megatron, rather than the original.