When the shape-shifting alien Blasters invade Earth to steal its oxygen, humanity's only chance is Ganger, a robot of living metal merged with a half-human/half-alien boy.

Kantaro learns more about the legacy his alien mother left him, while the Blasters plan on using a freeze ray to immobilize their new enemy, Ganger.

The Blasters cause a volcano to erupt so they can take over a populated island for their latest plot.

The Blasters use a giant moving rainbow that drains all nature of its vitality.

In an attempt to learn Ganger's secret, the Blasters send one of their own to Earth, in the form of Maya, Kantaro's mother.

The Ganger's latest secret weapon has Ganger trapped and suddenly rusting out inside an underground cavern.

While Ganger is on a deep space mission, the Blasters redirect a rocket with a nuclear warhead towards ISP Branch 4 on Earth.

The Blasters send voracious, ball-like Space Hounds to Earth to devour Ganger.

An old woman in sad circumstances has the trust of Rie and her family. Too bad she's a Blaster in disguise.

The Blasters brainwash Rie's young cousin and put him in a fake Ganger robot to battle the real thing.

The Blasters toy with the idea of annihilating all life on Earth and then starting over, but will proceed only if a certain experiment is successful.

While camping, Kantaro and Rie discover an experimental Blaster teleportation device that's guarded by a psychotic old man.

A giant Blaster robot threatens to destroy major cities until Ganger shows up for a showdown, but Kantaro is in the hospital, unconscious with a high fever.

Late at night, snowmen come to life and attack the town courtesy of Bad Snow, an alien villain in league with the Blasters.

A sunspot monster in the form of a fairy causes a mysterious aurora that drains the city of its power.

The Blasters threaten Earth with a formal declaration of war and assured destruction from a powerful alien ally unless humans surrender and turn over Ganger.

The Blasters brainwash an employee of ISP (and friend of Kantaro) and use him to find Ganger's secret or blow up the buildings if he can't.

When Kantaro gets a space disease, Ganger has to rush him to his mother's home planet for a cure, but the Blasters intercept them with a death trap.

Rie escapes Blaster captivity, but can she warn Ganger in time that the giant robot he's battling will explode with an antimatter bomb in a matter of moments?

A robot steps out of a popular manga magazine every time the page is opened and abducts the child reader, including Rie and Kantaro.