After being mortally wounded by Yogostein, Hiramechimedes goes on the run with B?seki Banki chasing him down to finish the job. While this occurred, the Sut? siblings question Jum-bowhale for having Bomper modify the Wing Engine casts before they encounter Hiramechimedes. By the time the Go-on Teams arrives, they see the wounded Hiramechimedes being attacked with the Go-ongers arriving to his aid too late as B?seki Banki knocks him off a cliff. The Go-ongers follow Hiramechimedes' oil trail to find him, but he's too wounded to attack them and beyond Bomper's medical skills. Seeing that he's to shut down soon, Hiramechimedes as a last request: To settle things with Hiroto in a plane race between his Barbaric Dohma SP and Toripter with Hellgailles Palace as the goal. S?suke, feeling for the Vice Minister, arrives to the Sut? residence to beg for Hiroto to honor the final request, providing Hiramechimedes' map to Gaiark's base as a proof of good will. Though reluctant, Hiroto arrives and Hiramechimedes thanks him as the two enter their flying machines for a high-speed flying race. However, once at "Hellgailles Palace", Hiramechimedes reveals both it and his wounds to be an illusion in order to regain his honor and title, fighting Go-on Gold one-on-one as B?seki Banki undergoes "Original Industrial Revolution". But, Hiroto expected the trap as Miu arrives with Jetras and Jum-bowhale as they all form Seiku-Oh. However, Hiramechimedes uses the island's storm-ridden environment to ground them for B?seki Banki to capture them. But before B?seki Banki can land the death blow, Engine-Oh and GunBir-Oh arrive and attack B?seki Banki unaware of Hiramechimedes' betrayal until they free Seiku-Oh. Infuriated of being played like that, the Go-ongers go wild on B?seki Banki and Hiramechimedes, with the Go-on Wings realizing Jum-bowhale's reasons for supporting the Go-ongers. As a result, the Go-on Wings execute with the Go-ongers the G9 Formation that Bomper was working on, combining all nine Engines into Engine-Oh G9 who scraps B?seki Banki with Hiramechimedes nearly killed himself. As the Go-on teams are all on the same page finally, a damaged Hiramechimedes walks off bent on revenge.