The Earthbreaker made its debut in the same episode as the Mechanic. It appeared somewhere in the African desert where it splits open the ground and starts scooping up scandium ore, a rare mineral that is twice as valuable as gold. However, a group of miners fall and get trapped in the crevice. The Mechanic didn't care about innocent bystanders and the Earthbreaker does not stop. When GDF Flyers and later Thunderbird 2 try to intervene, he simply launches Air Mechas, disabling the GDF aircraft and forcing Virgil Tracy to rush back to Tracy Island and crash land. Meanwhile, Kayo successfully infiltrates the Earthbreaker and confronts the Mechanic, only to end up being chased by his drones while Scott Tracy works to rescue the trapped miners. Kayo eventually defeats the Mechas and sabotages