|This article is about a/an episode in Engine Sentai Go-Onger.|
Sosuke... Eternally (走輔…トワニ Sōsuke… Towa ni) is the thirty-sixth episode of Engine Sentai Go-Onger. It is the conclusion of the two part showdown with Land Pollution Minister Yogostein and deals with the fate of Sosuke Esumi.
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After Sōsuke is encased in rust by Yogostein's attack and presumed dead, the other Go-Ongers and the Go-On Wings grieve over him and vow to defeat Yogostein. Meanwhile, Yogostein, relishing in his Horonderthal upgrade, is out terrorizing the city. The enraged Go-Ongers and Go-On Wings confront the Pollution Minister, but their rage at Sōsuke's condition affects their fighting effectiveness, and they are easily defeated. To add insult to injury, Yogostein snatches away everyone's Change Souls, returning them to their civilian forms. Bomper and the Ancient Engines arrive just in time to ferry the team to safety. The defeat leaves the teams feeling worse than ever. However, their memories of Sōsuke's finest moments inspire them to confront Yogostein once more, despite their inability to transform. Though outmatched, the team manages to severely wound Yogostein with his own YogoSpear before he enlarges. Renn asks BOMPER to send the Engine Casts to them. Despite Sōsuke's absence, Speedor gladly joins the battle. Everyone boards their respective Engines, knowing full well that their civilian forms will be severely tested. When Renn spots the Change Souls inside the wound on Yogostein's body, Speedor throws himself at the Pollution Minister and pins him down long enough for the Go-On teams to climb inside and reclaim their Change Souls. The Go-On teams transform and assemble Engine-Oh G12, which quickly takes Yogostein down and undoes the rust attack he had unleashed on the city. Yogostein, further injured and back to normal size, is still determined to use the now-damaged Horonderthal upgrade key. He attempts to flee, but he is confronted by a revived and extremely angry Sōsuke. As his teammates watch anxiously, Sōsuke transforms into Go-On Red and engages Yogostein in a one-on-one duel. Go-On Red wins the duel and Yogostein is destroyed. Kegalesia and Kitaneidas mourn the loss of their comrade as the Go-On teams celebrate Sōsuke's recovery.
- Sosuke Esumi (江角 走輔 Esumi Sōsuke): Yasuhisa Furuhara (古原 靖久 Furuhara Yasuhisa)
- Renn Kousaka (香坂 連 Kōsaka Ren): Shinwa Kataoka (片岡 信和 Kataoka Shinwa)
- Saki Rouyama (楼山 早輝 Rōyama Saki): Rina Aizawa (逢沢 りな Aizawa Rina)
- Hant Jou (城 範人 Jō Hanto): Masahiro Usui (碓井 将大 Usui Masahiro)
- Gunpei Ishihara (石原 軍平 Ishihara Gunpei): Kenji Ebisawa (海老澤 健次 Ebisawa Kenji)
- Hiroto Sutou (須塔 大翔 Sutō Hiroto): Hidenori Tokuyama (徳山 秀典 Tokuyama Hidenori)
- Miu Sutou (須塔 美羽 Sutō Miu): Yumi Sugimoto (杉本 有美 Sugimoto Yumi)
- BOMPER (ボンパー Bonpā, Voice): Akiko Nakagawa (中川 亜紀子 Nakagawa Akiko)
- Engine Speedor (炎神スピードル Enjin Supīdoru, Voice): Daisuke Namikawa (浪川 大輔 Namikawa Daisuke)
- Engine Bus-on (炎神バスオン Enjin Basuon, Voice): Hisao Egawa (江川 央生 Egawa Hisao)
- Engine Bearrv (炎神ベアールＶ Enjin Beārubui, Voice): Miki Inoue (井上 美紀 Inoue Miki)
- Engine Carrigator (炎神キャリゲーター Enjin Kyarigētā, Voice): Kyousei Tsukui (津久井 教生 Tsukui Kyōsei)
- Engine Toripter (炎神トリプター Enjin Toriputā, Voice): Shizuka Ishikawa (石川 静 Ishikawa Shizuka)
- Engine Jetras (炎神ジェットラス Enjin Jettorasu, Voice): Kiyotaka Furushima (古島 清孝 Furushima Kiyotaka)
- Land Pollution Minister Yogostein (害地大臣ヨゴシュタイン Gaichi Daijin Yogoshutain, Voice): Kiyoyuki Yanada (梁田 清之 Yanada Kiyoyuki)
- Water Pollution Minister Kegalesia (害水大臣ケガレシア Gaisui Daijin Kegareshia): Nao Oikawa (及川 奈央 Oikawa Nao)
- Air Pollution Minister Kitaneidas (害気大臣キタネイダス Gaiki Daijin Kitaneidasu, Voice): Mitsuaki Madono (真殿 光昭 Madono Mitsuaki)
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- As part of Super Hero Time, this episode aired alongside Kamen Rider Kiva episode 38, Erlkönig: Mother and Child Reunion.
- Engine Narrator: Engine Jum-bowhale
- Engine Eyecatch Race Winner: Engine Buson ("It's a turnaround victory!")
- Go-On Seminar: How tall is Engine-O G12?
- Answer: 93 meters (the height of a 20 story building)
- When Sosuke becomes encased in rust, while the other Go-Ongers and Hiroto display, shock and grief, Miu in particular seems to grieve the most over him. This further supports the idea that Miu harbored romantic feelings for Sosuke.
Engine Sentai Go-Onger DVD Volume 9 features episodes 33-36.
The Blu-ray release of Engine Sentai Go-Onger Volume 3 features episodes 34-50.