|This article is about a/an episode in Engine Sentai Go-Onger.|
Reckless Flash (暴走ヒラメキ Bōsō Hirameki) is the twenty-third episode of Engine Sentai Go-Onger.
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While out shopping, Hiroto is followed by Sōsuke as he wants get the teams more on the same page, though the two were total opposites, until Hiroto senses Hiramechimedes as he calls the Go-on teams out. Though bent on killing the Go-ongers to reclaim his honor, Hiramechimedes attempts uses his new attack, only to forced to retreat. But bent on repaying Yogostein for recognizing him and naming him his Vice Minister, Hiramechimedes reaches the conclusion of following the Go-ongers' example and rely solely on power. To that end, Hiramechimedes sneaks back into Hellgailles Palace and infuses himself with a hundred times the normal amount of Bikkurium. In spite of Yogostein's pleas of the horrific side-effects, Hiramechimedes' resolution to restore his master's honor is stronger as he takes in the energy overload and upgrades into the more powerful form of Detaramedes at the cost of his intelligence. Calling out the Go-ongers with his new found power, Detaramedes overwhelms Seiku-Oh and Engine-Oh G6 easily and then defeats Engine-Oh G9 without trouble as he prolongs killing them with Go-on Gold unable to read the monster's moves. But Sōsuke manages to turn the table as Engine-Oh G9 grabs Detaramedes and recklessly executes the G9 Grand Prix at close range, though he survives the attack and returns to his normal size as he overpowers Go-on Gold with his opponent still unable to read his senseless attacks. But Go-on Red comes to Go-Gold's aid and fight Detaramedes, refusing to lose. Realizing that Sōsuke does have a chance due to his own reckless fighting style, Go-on Gold gives Go-on Red his Rocket Booster to help him scrap Detaramedes. But as the Go-on teams take their leave, the Go-on Wings able to finally move on, a devastated Yogostein arrives to pick up the Hacalibur from his friend's remains.
- 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 Toripter (炎神トリプター Enjin Toriputā, Voice): Shizuka Ishikawa (石川 静 Ishikawa Shizuka)
- Engine Jum-bowhale (炎神ジャンボエール Enjin Janboēru, Voice): Tomomichi Nishimura (西村 知道 Nishimura Tomomichi)
- 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)
- Land Pollution Vice-Minister Hiramechimedes (害地副大臣ヒラメキメデス Gaichi Fuku Daijin Hiramekimedesu, Voice): Kazuya Nakai (中井 和哉 Nakai Kazuya)
- Clerk: Soichiro Watabe (渡部荘一郎 Watabe Sōichirō)
- Go-On Red - Change Soul, Engine Soul #1, Blaster Soul
- Go-On Blue - Change Soul, Engine Soul #2, Blaster Soul
- Go-On Yellow - Change Soul, Engine Soul #3, Blaster Soul
- Go-On Green - Change Soul, Engine Soul #4, Engine Soul #6, Blaster Soul
- Go-On Black - Change Soul, Engine Soul #5, Engine Soul #6, Blaster Soul
- Go-On Gold - Change Soul, Engine Soul #7, Engine Soul #9, Blaster Soul
- Go-On Silver - Change Soul, Engine Soul #8, Engine Soul #9, Blaster Soul
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- As part of Super Hero Time, this episode aired alongside Kamen Rider Kiva episode 26, Metronome: Miraculous Memory.
- Engine Narrator: Engine Toripter
- Engine Eyecatch Race Winner: Engine Speedor ("I won by a long distance!")
- Go-On Seminar: Who is the mysterious woman who appears in the movie?