The final showdown takes place.
Galavatron captures the children of the world to force the Autobots to leave.
The Decepticons discover the Autobot base and attacks to steal Cerebros.
Koji switches places with a friend, who is captured by the Decepticons so they can control Fortress Maximus.
Megatron and the Decepticons review the actions of Ultra Magnus in hopes of finding a way to defeat him.
Koji thinks he can control Fortress Maximus.
The Decepticons capture Cerebros to activate Fortress Maximus.
After putting the O-parts together, the Autobots find an ancient power source.
The Build Team and the Autobot Brothers compete to find O-parts.
Koji is finally reunited with his father, thanks to Sky-Byte.
The Decepticons and Autobots search for ruins that are in fact, Cybertronian.
Scourge offers Ultra Magnus a partnership to destroy Optimus.
Sky-Byte offers Ultra Magnus an alliance, providing he can prove he can be trusted.
The Autobots review the Decepticons.
While recuperating, Optimus is attacked by the Decepticons but saved by Ultra Magnus.
Ultra Magnus arrives and fights Optimus for the Matrix.
The Bulid Team alters the space bridge so they can fight the Decepticons on their own.
The Predacons plan to destroy a tower, but when they realize that they can get the O-Parts in exchange for the hostages, Sky-Byte has a change of heart.
The Decepticons gain access to the global space bridge and reprogram it so the Autobots arrive in random locations.
The Build team tire of buliding and decide to fight.
Sky-Byte attacks the Autobots to disprove a test that says he's a jellyfish.
The Decepticons decide to defect.
Movor takes the place of a shuttle to attack the Autobots from space.
The Predacons attack a carribean island but in doing so, activates a volcano.
Megatron captures a set of protoforms and forms a newer, more classical faction of troops... the Decepticons.
The Autobots review the Predacons actions, in hopes of finding a way to proceed.
The Predacons think the humans have a Transformer, and decide to steal it.
The Autobot Tow-Line enjoys towing away law-offenders, including his own friends. The Predacons scheme to use this quirk to their advantage.
The New Autobot Skid-Z arrives on earth. He scans an old racing car but in doing so he is given a competitive instinct to race anyone anywhere. Knowing this, all the Autobots enter a large race hoping to find Skid-Z but Megatron has his own plans....
Mirage turns against his friends and joins the Predacons. But is it even real?
Koji is invited to take a trip on an old steam engine called D-5. Team Bullet Train travel beside the train as well. The Predacons think that Team Bullet Train is following the train because it is some sort of secret weapon and they try to steal it.
The Predacons take advantage of Sideburn's lust for red sports cars, to lure him into a trap. Once they have Sideburn, they hope to reel in Optimus as well..
Sideburn and Koji investigate a cavern, with Sky-Byte not far behind.
The Predacons discover a Black Pyramid, a source of great power, and attempt to harness it for their own purposes.
The Spychangers, a squad of Autobot stealth soldiers, are deployed to safeguard a generator the Predacons are after.
The Predacons are taking control over Linear RFG - the world's fastest bullet train. So, Optimus Prime is mobilizing Team Bullet Train to stop the train, while the others are fighting with the Predacons.
An evil race of transforming robots known as the Destronger make their appearance known by invading a world exposition in New York and abducting Professor Onishi, a renowned scientist. The professor's son Yuuki befriends Fire Convoy and the heroic Cybertron forces, who will stop at nothing to rescue the professor and protect Earth from the wrath of Gigatron and his Destronger henchmen.