Inspired by the Troopers, Grimlord sets up his own ruthless obstacle course for his army to sharpen their skills. The one that didn't compete was Combax, a commando-themed robot. Combax refused to participate claiming he was already the best warrior in the competition and Grimlord agreed possibly impressed by the robot's cockiness. Combax then captured Tao's nephew Ricky, which then lured Ryan to the obstacle course with overwhelming odds. Ryan eventually survived the obstacle course and defeated/destroyed Combax with the "Lightning Hand" command. After the self-destruction of Grimlord's dungeon, Combax survived as a mere head. His head attacked Ryan and was soon destroyed afterward, inflicting pain on the weakened Ryan as well. Combax fits the category of Decimator's army.