The Go-ongers manage to enter Hellgailles Palace and battle Yogoshimacritein as he absorbs power from the Deus Haguru Magear. But once they trap him in the Bikkurium Chamber, Go-on Red uses the primary Engine-powered Kankan MantanGun to destroy the gear. But the destruction of the Deus Haguru Magear causes Hellgailles Palace to self-destruct with the three Go-ongers running for their lives in Engine-Oh. However, Yogoshimacritein managed to reconstruct himself after Hellgailles Palace's destruction as he decides to destroy the city in retaliation. But the Go-on Wings, Go-on Black, and Go-on Green return and hold him off until the primary Go-ongers arrive. Though the Crime Minister boasts of invincibility, the Go-ongers refuse to give up and hit him with their Go-on Bonds Special. But when Yogoshimacritein Third Industrial Revolutionizes, the other Engines arrive as they all form Engine-Oh G12 to stop Crime Minister once and for all with their G12 Final Grand Prix. With the Gaiark finally defeated and the Human World safe, the Engines must leave their partners and return to their world. After saying their goodbyes to the Engines and Bomper, the Go-ongers see their friends off.