The sudden reappearance of the Decepticons on Earth forces the long-hidden Autobot Pretenders to drop their human disguises and rejoin the fight.
The Decepticons transform human corpses into undead "Destroids", and then attack the island nation of Karin, where the Autobots must team up with the island's prince, Cab, to save the day.
Seeking live humans for their Destroid experiments, the Decepticons attack jumbo jets, bringing the Autobots into contact with a young girl named Minerva.
Shūta, Cab and Minerva become Headmaster Juniors, but the Decepticons have recruited humans to their side as well.
Minerva is forced to overcome her fear of fighting when the Decepticon Headmaster Juniors cause chaos as they seek revenge on a motorcycle gang from Wilder's past.
Wilder continues to revisit his past when he kidnaps a former member of his gang who turned against him, and Shūta has to lead the Headmaster Juniors in rescuing him.
It's the Autobots to the rescue when the Decepticons cause animals to stampede in Africa in a scheme to destabilize the balance of nature!
A new element enters the Masterforce War in the form of Hydra and Buster—the Godmasters!
The construction of the world's largest tidal power plant in the Karin Islands quickly attracts the attention of the Decepticons, and the Autobots are once again faced with the power of the Godmaster brothers.
On the day that he discovers a mysterious truck, a young man named Ginrai suddenly finds himself caught up in the war between the Autobots and Decepticons.
While Ginrai debates over whether or not to join the Autobots, the Decepticons begin a series of fatal attacks on his trucker friends in an effort to draw him out.
In an attempt to learn the secrets of the Godmasters, the Autobots capture Cancer, who develops the world's worst case of Stockholm Syndrome.
The chase is on when Ginrai's Transtector activates on its own, and leads the Autobots and Decepticons to a mystery buried at a construction site.
The command goes out for the Decepticons to utterly destroy Ginrai, and he inadvertently makes himself easy to find when he appears on television searching for the remaining Godmasters!
To rescue a group of kidnapped children and defeat the menace of King Poseidon, Ginrai must discover a new transformation!
The search for the next Godmaster leads Ginrai to Canada, and a young man named Lightfoot!
Attempting to track down new leads on the location of the remaining Godmasters, the Autobots venture into the Rocky Mountains, where they cross paths with a forest patrolman named Ranger, but Minerva suspects that he is working with the Decepticons!
A new threat to the Autobots arrives from space in the form of Sixknight, a Six Changer who targets Ginrai in order to prove his worth to the Decepticons. But Sixknight is in for a shock when he discovers the true nature of his opponent...
The search for the fourth Godmaster brings the Autobots and Decepticons to France, where the Headmaster Juniors attend the finale of the World Grand Prix, and meet the champion racer, Road King.
Both Sixknight and Cancer have been greatly affected by their experiences with the Autobots and decide to do something about their conflicted loyalties.
Cab's return home is an unhappy one thanks to the latest scheme by the Decepticons, which puts the life of his childhood friend Copo in danger.
As the Decepticons' newest plan slowly begins, Lightfoot finds himself alone against the Decepticons with his father's life at stake.
The Decepticons prove that you shouldn't believe everything you see on TV.
Ginrai faces his greatest challenge yet when Mega and Giga reveal their true power.
With Ginrai out of commission, the Decepticons initiate an all-out attack on the Bomber Project.
With the Bomber Project completed, Ginrai heads for the moon, and the battle of his life!
On the lunar surface, God Ginrai fights a desperate battle against Overlord and BlackZarak, with the fate of the world at stake!
Overlord formulates a plan for revenge against Ginrai, but Godbomber is about to unveil a surprising new power that will thwart his evil scheme!
When Lightfoot investigates the eruption of an underwater volcano, he discovers the site of a new Decepticon base.
In the heartland of America, the Decepticons spring a trap that puts Godbomber in danger, forcing the Headmaster Juniors to discover a new power that will save the day.