Transformers: Armada - S01

On the mechanical planet Cybertron live super robotic organisms known as Transformers. There, the Cybertron army, made up mainly of convoys, and their old enemy Destron fell into conflict to gain hold of a new power that would join their side: a new breed of Transformers known as the Microns. But grieving over the battle, the Microns set off to the other end of the universe. 4 million years later, on Earth, 3 young children activated a mysterious panel inside a cave. And somehow, that was the dormant Micron...