The Super X was built in secret to defend Tokyo against a military invasion or nuclear accident. However, it was first used against Godzilla when he attacked Tokyo, in conjunction with the N1-00s. The first encounter between the kaiju and the machine was a success for humanity - the Super X discharged its cargo of cadmium missiles into Godzilla's mouth, halting his nuclear reactions to the point that he collapsed against a building, near death. At the same time, an accident involving the damaged Balashevo caused the Soviet Nuclear Attack Satellite to fire a nuclear weapon at the city. An American nuke was launched in response, but the collision of the two missiles generated a massive storm which disrupted the Super X’s systems. Lightning from the storm struck Godzilla's dorsal fins and revived him. The Super X, now out of cadmium shells, engaged Godzilla again, but its other weapons were unable to harm him. It was destroyed after a blast of Godzilla's atomic breath damaged its engines and forced it to land, allowing him to drop a building on top of it.