The Dino Knights battle an army of Dragozaurs in order to get to the planet-killer device and free Dino Ramph, but Diamond Ryugu arrive on Earth herself to fight the Knights. As she begins to destroy the Knights, Gigano Dragon arrives and demands to finish off Tyranno personally. The two of them fight, while Kaito, Rena and Rick enter the planet-killer in order to get closer to Dino Ramph and use their Dino Daggers to free him. Gigano merges with Drago Wing to become even more powerful, and renews his final battle with Tyranno, while Ryugu holds the rest of the Dino Knights at bay. Inside the planet-killer, the kids avoid a series of booby-traps, but find that their daggers are beginning to run out of energy, turning back into fossils. Diamond Ryugu begins absorbing the Earth's life force, destroying the planet, when suddenly Kaito, Rena and Rick put their faith in the Dino Daggers and free Dino Ramph from the machine. Dino Ramph, Dino Tyranno and the rest of the Dino Knights then use all of their remaining life force to defeat Diamond Ryugu and destroy her planet-killer.
