G-Tortoise mutates after suffering major amounts of damage. It has three mutation forms. G-Tortoise has a armored torso, only the arms, legs, and head are exposed. The red spot seen on G-Tortoise's neck is where it produces acid. The brighter the color, the hotter the acid. It has sharp teeth which is more than capable of piercing human flesh. G-Tortoise moves at moderate speed and agility. Finally, its hands have no claws and are used for punching or grabbing.