The Autobots are alien robots from the planet Cybertron who came to Earth to pursue the Predacons and assume various vehicular disguises while operating on the planet.
Autobot Brothers are three-man of Autobots, who both transform into the vehicle cars mode, Later giving by Ultra Magnus the Super changing color mode.
A team of six Autobot espionage specialists capable of driving on almost any surface, turning invisible, and phasing through solid objects.
Fortress Maximus, or "Brave Maximus" in Japan, is a Cybertronian battle station hidden on Earth in order to protect it. His activation keys - the O-Parts, the Orb of Sigma, and a small robot called Cerebros ("Plasma" in Japan) that forms his head via an intermediary robot called the Emissary ("Brave" in Japan) - were scattered across the planet and hidden within ancient structures. While a group of Autobot protoforms were sent to recover him sometime prior to the past, they fell into stasis and Fortress Maximus went undiscovered until the present when the Autobots and Predacons' battle led to their locating the giant Cybertronian. Fortress Maximus and Cerebros/Emissary are voiced by Steve Blum and Steve Kramer respectively and by Masayuki Kiyama (Japan).
The Predacons, similarly to the Autobots, are aliens from the planet Cybertron who can transform into robotic animals and came to Earth to seek the power of Fortress Maximus for nefarious means.
The Decepticons, or "Combatrons" in Japan, are formerly six Autobot protoforms who were put into stasis and sent to Earth to find Fortress Maximus, only for their ship to crash in the mid-20th century. In the present, Megatron locates and reprograms them to serve him and bolster his forces.
In Car Robots, Optimus and Ultra Magnus each possess a Matrix, which is held by high-ranking Autobot commanders, and the latter's goal is to take Optimus' Matrix and combine it with his. ↩