Earth: Taking advantage of abundant natural resources, the Earth robo-warriors have specially-designed energy cores which can optimize long-term combat.
Mars: What the Martian robo-warriors lack in copious energy core they make up for in strong resistance to ice attack.
Venus: Venus is the hometown of the most skilled robo-warriors. With excellent defense and attack skills, the Venus warriors are among the most powerful heroes in the RoboX universe.
Mercury: The smallest planet with the most powerful military force. Here, the wars happen constantly and the warriors only exist for the sole purpose of fighting.