On the Planet Cybertron, after the legendary battle against the dreaded Devastator, the Autobots and Decepticons have returned to their home planet, as their millennia long war rages on once again, but, when both the Autobots and Decepticons get flung into the land of Equestria, the leader of the Autobots, Optimus Prime, meets a pony called Twilight Sparkle, who is the leader of the Mane 5, and introduces him to Equestria, but, the Decepticon warlord teams up with their archenemy, Queen Chrysalis, and creates a new foe... Nemesis Prime! A dark duplicate of the Autobot leader, created by both Cybertronian technology and Equestrian magic. As it is up to both the Autobots and the Mane 6 to the alliance between the Decepticons and the Changelings.
