When rescuing his longtime friend Kobayashi, Tsukioka witnessed what would soon strike Osaka like a holocaust. The echoing roars, resounding along the craggy cliffs, marked the stage battle between two massive living mountains of flesh and bone. One of which struck terror in the core of the two men, Godzilla, as yet another of the terrifying species of dinosaurs was alive and doing battle. The opposing force, a quadruped spiked shelled beast, dubbed Anguirus, fought with animalistic fury. The twin titans so consumed in their fight, fell from the cliffs, each still clawing and tearing at the other. It was not long before the war drug itself onto the city of Osaka. The monsters trashed what beauty that existed in less than a few hours, but it was the gargantuan beast Godzilla that won, ripping the throat of the Anguirus, and feeling its blood run through his teeth. Roasting the carcass, the monster left the shores and headed back into the seas that he knew so well.

Nearly three decades passed before humanity was able to behold the sight of another. This one had taken home on an island. Coexisting with another resident, Godzilla, the beasts gained respect within their reptilian eyes. In the early 1970's the duo of saviors swam to Japan to stop the rampaging creations of space. Under Godzilla and Anguirus' combined might, the two were able to drive off the team of Gigan and King Ghidorah. When returning to their island, a massive underground volcano rocked the land. Opening its massive soiled maw, the ground swallowed Anguirus, taking him deep into the belly of fire and flame. Eternal and consuming darkness was his womb, tagging and calling out, as the dinosaur moved. Traveling through the layers of rock and stone, the behemoth finally lifted from the strata. Wrenching free, the spiked reptile found himself in the cold artic regions of the Siberian lands. The glacier sheets of ice quaked beneath his howling cries. He sensed a growing evil, and longed to return to Japan.

Diving back into his tomb, the beast dug his way back to Japan. It was not long before he arrived, pulling from the ground and finding a disguised foe. The organically skin covered Mechagodzilla raged as it was attacked. The cloak of deception might have fooled humanity, but not Anguirus. The spiked monster attacked with whole heart, but could not stand against the awesome power that dwelled within the machine Mechagodzilla. Being manhandled, and jaw broken, the monster was forced to give to retreat, and dove back into its hole.

More time passed, giving the monster time to heal its wounds, but in near peak of the 21st century, an alien race invaded Earth. Calling themselves the Kilaakian, the beings took hold of all of the terrestrial monsters of earth, then sending them out to the farthest corners of man's domain, they placed their domination in full swing. Having Anguirus as a guard dog, the beast protected the main bunker base of the aliens with a bloodlust unmatched. It was not until the strength of man was able to sever the link, did the monsters regain their true nature. Fearing that defeat was possible, the Kilaak's released their last ditch monster, King Ghidorah, against the Earth monsters. Yet the space demon could not muster the power, and was killed. Its body disappearing into the ground of which the land it tried to destroy. Leaving Anguirus, and the rest of Earth's giant kaijus to return and live in peace.