Galvatron used to be Megatron, but after being exreamly injured by Optimus Prime, he escaped to Mars with Starscream, Soundwave, Barricade, & Scorponok. After signaling Soundwave's brother Soundblaster to come to Mars, he not only came, but he came with a cloning machine, and a weird box. After the failed cloning of Blaster (Failed 'cause he became an Autobot), Megatron went away to come up with a plan to steal the Matrix. After Starscream created the Starscream clones Hellbat, Hooligan, Ulchtar, and Sunstorm, Megatron made his move. First, he went and opened the box, witch shot him with a massive surge. Then, Megatron (In a new body) went to earth with Soundblaster. They came at the end of the fight between the Autobots, and Starscreams. After the last clone was defeated, Megatron made his move, shooting Prime with his new cannon. Impessed by that shot, Megatron renamed him self GALVATRON!!!!!!!!!!!!!!!!!! (yeah............). After Soundblaster stole the matrix, Galvatron and Soundblaster retreated to Mars.ROTF chapter 2
After that, Galvatron revealed who he acctually worked for: Unicron. Upon using the Matrix to cyberform Mars into Unicron's new body, his soldiers retreated. But then, Unicron used the Cloning thingy to create 10002 Green Starscream-like drones, and a living Green Starscream to help command them: Acid Storm. When the Autobots attacked, the drones kept most of the Autobots at bay, while Blaster and another Autobot named Hot Rod infiltrated Unicrons innards. When the 2 got to a ledge overlooking Unicron's core, Galvatron and Acid Storm attacked. While Acid Storm attacked Blaster,Galvatron attacked The Kid. Hot Rod was fast, and was able to evade Galvatron's Attacks, and steal back the Matrix. Unicron saw that, and upgraded Galvatron to a Sunstorm-like power-level. Hot Rod upgraded into Rodimus Prime, and shoved Galvatron over the ledge and into Unicron's core killing him and causing Unicron to explode. Unfourtunaly, the Autobots escaped, with Acid Storm as their captive.ROTF chapter 3
Galvatron Brieflly returned as a hallucination created by The Fallen. ROTF III chapter 1