He was born on Cybertron, 10 years ago, since he was a Cybertronian. During he entered the Temple of Light, seeing the hall of artifacts, he saw the artifact known as the memory stone. He accidentally touches the memory stone, zapped himself during his memory loss. His elbow presses the button and open the Synthetic Space Bridge. He slipped to the portal and flung away to the another dimension. While on Human World of Equestria. He was reformatted by a human form. And he has amnesia. And no longer can remember on Cybertron.