The ninja robots are mechas that can be controlled only by individuals with special abilities. In the event of the pilots losing their physical strength, they merge with a special ninja robot called Cybertron (Tobikage) and transform into a more powerful combination.
The pilots of both Cybertron (Joe) and Zerokage (Icelander) have a deeper association with their ninja robots. The robots instinctively respond to them and merges with them when their lives are in danger (as seen when Joe and Icelander are in their mortal forms when G-Excellent is destroyed, but are found by Hazzard drifting in space in their robot forms). They also have reciprocal power levels. They combine to form a luminous power source that not only energizes Xenos 5, but also has the potential to destroy stars (and their previous inadvertent combination contributes to a widespread damage of G-Excellent).
Cybertron is a small ninja robot, approximately 3.6 m (12 ft) tall and weighing 500 kg (1,100 lb). It mysteriously appears whenever the ninja robots are low on power or are facing overwhelming odds. It can fight on its own or can combine with one of the ninja robots (when the pilots are weak) to form a more powerful mode. From episode 26 onwards, Joe is able to summon and pilot Cybertron. Icelander tracks the origin of Cybertron to the secret chamber aboard the Xenos 5.