Someday, in the Sea of Stars...

Synopsis

About three years before EI-01's fall, Mikoto, implanted with a machine realm seed, transforms into the new machine species Zonuda. Zonuda descends on Earth to guide it toward substance elevation, transcending even machine realm ascension. The Orbit Base has lost power and cannot operate properly. GGG members manually load the brave robots' AIs and G-S Rides onto the Gaou Machines, calculate reentry trajectories, and successfully land on Earth. On the ground, Mamoru and Galeon struggle against the Zonuda robot, overwhelmed by Zonuda's immense power. Then Guy and the Gaou Machine arrive. Guy performs Final Fusion with the Gaou Machine loaded with the brave robot's AI, becoming GaoGaiGar with the combined power of the supreme brave robot army. But even at full power, defeating the Zonuda robot proves difficult. Mamoru, shielding others, has his body blown away. GaoGaiGar, battered across its entire frame, tears out Zonuda's core. But with purification-capable Mamoru fallen, they cannot save Mikoto. When Guy speaks the purification incantation filled with his feelings for Mikoto, a miracle occurs. Mamoru returns, Mikoto returns to her original form, and Guy becomes a bio-machine fusion entity—Evolyuder. The surviving comrades and Kanayago and the Carpenters save the city, and true peace finally arrives. Mamoru departs with Galeon into space to save other worlds beyond Earth...