He sent a flock of Divebombs to attack a group of Autobots who were surveying a hill for energon tower sites. Megatron took leadership of the Decepticons, leading them in obtaining Earth's energon. Much later, he was reborn as 'Megatron' in a new body within Unicron. Armada Volume 4 Galvatron was somehow absorbed into Unicron. Together, their power was too much for Overload and Rollout, but their battle was cut short when Unicron arrived. On the way to prison, Galvatron was rescued by Tidal Wave, who combined with him. On Cybertron, Galvatron was 'finally' defeated by Optimus, but this was part of a cunning plot to destroy Optimus Prime. 2.3 Transformers Energon: Battle for Megatron.Optimus Prime mourns for his enemy, ' Optimus Prime vs Megatron: The Ultimate Battle' There was a time Megatron actually seemed to care about the Decepticons under his command, but now all he cares about is power. Megatron seems to change forms like a race-bot changes tires, but with every re-scan he only grows more twisted and evil. Once Optimus Prime is gone, there may be no further challenges in this universe. On the occasions Prime has seemingly been destroyed, Megatron has sunk into a deep depression. No matter how much power he attains, his final, glorious battle must be against him. Megatron's only weakness is his obsession with Optimus Prime. He makes it perfectly clear that he is completely cognizant of his madness. He calls his closest troops 'gentlemen.' He speaks politely and intelligently. Megatron tempers this barbarism with regal militaristic formality. He is a monster in every sense of the word. Any opposition is savagely crushed, any insubordination violently punished. Megatron demands complete submission from those around him. He will subjugate it, bend it to his will, carve up its corpse and integrate its power into himself. When he learns of some power greater than his own, he does not attempt to merely defeat it. Megatron is not content with conquest of Cybertron. Megatron's fashion sense recognizes that stag beetles are the most evil of all Earth's insects.

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