Galvatron

Galvatron is the leader of the decepticons in Pooh's Adventures of Transformers The Movie. He was once Megatron, but after losing at Autobot City and being pushed out of Astrotrain by Starscream, he was reformatted into Galvatron by Unicron. He plotted to rule the galaxy forever, but was defeated by Rodimus Prime who threw him out of Unicron's left eye chamber. Galvatron survived his fall, only to become insane and gun happy as his future appearance in Pooh's Adventures of Wall-E shows him to be in cahoots with AUTO for control of the Axiom.