|This article is about a/an episode in the Super Sentai series.|
|WARNING: This episode contains scenes of blood and bloodshed. Viewer discretion is advised!|
Battle1: Who is the Strongest in History!? (史上最強は誰だ！？ Shijō Saikyō wa Dareda?) is the first episode of the 4 Week Continuous Special Super Sentai Strongest Battle!!. It features the first appearances of Rita, Gaisorg, Ryusoul Green and Ryusoul Black.
A mysterious armored warrior known as Gaisorg stands before the Gokaigers! The Gokaigers are overwhelmed by Gaisorg's power, but just then, a golden plate lands before Marvelous after he gets knocked out of his transformation!
Space changes and he finds himself with a mysterious girl named Rita and Keiichiro Asaka who was working overtime at the GSPO. Rita declares that anyone who wins the "Super Sentai Ultimate Battle" will get any wish they so desire! Keiichiro is transported to Planet Nemesis, where several Sentai heroes are gathered there as well, including Yamato Kazakiri, Captain Marvelous, Kagura, Takaharu Igasaki, and Stinger!
Rita divides everyone into 32 teams of 5 members each, reiterating that whichever dream team wins will get their wish granted! The various dream teams aim for the championship, but Gaisorg, who just seeks to fight strong warriors, reappears once again and causes great distress for the various Sentai teams! How will the Super Sentai Strongest Battle go?!
The Gokaigers are attacked and defeated by Gaisorg, a mysterious warrior seeking out the strongest among the Super Sentai, who takes his leave while a golden ticket appears in Captain Marvelous' hand. At the GSPO headquarters, Keiichiro Asaka also receives a ticket and is contacted by Rita, a girl who is summoning every Super Sentai hero for a tournament at planet Nemesis, promising that the winner will have one wish granted. The summoned Sentai are divided into groups of five, with Marvelous placed into the "Oddball Team", along the Zyuohgers' Yamato Kazakiri, Takaharu Igasaki from the Ninningers, Stinger from the Kyurangers, and Kagura from the ToQgers. During the first round, Yamato faces off against Keiichiro until he convinces a truce upon hearing the GSPO officer's wish for a peaceful world. Meanwhile, another team who passed the first round is suddenly attacked by Gaisorg, and Marvelous reveals that he's just participating in the tournament to fight him again. During the second round, Takaharu and Stinger easily defeat the Boukengers' Eiji Takaoka and Sōsuke Esumi from the Go-Ongers during their argument before being attacked by Gaisorg, whom Marvelous pursues. Meanwhile, also possessing tickets, Ryusoul Green and Ryusoul Black explore a cave together.
- Yamato Kazakiri (風切 大和 Kazakiri Yamato): Masaki Nakao (中尾 暢樹 Nakao Masaki)
- Captain Marvelous (キャプテン・マーベラス Kyaputen Māberasu): Ryota Ozawa (小澤 亮太 Ozawa Ryōta)
- Takaharu Igasaki (伊賀崎 天晴 Igasaki Takaharu): Shunsuke Nishikawa (西川 俊介 Nishikawa Shunsuke)
- Stinger (スティンガー Sutingā): Yōsuke Kishi (岸 洋佑 Kishi Yōsuke)
- Kagura Izumi (泉 神楽 Izumi Kagura): Ai Moritaka (森高 愛 Moritaka Ai)
- Rita (リタ Rita): Nana Asakawa (浅川 梨奈 Asakawa Nana)
- Gaisorg (ガイソーグ Gaisōgu, Voice)/Narrator: Tomokazu Seki (関 智一 Seki Tomokazu)
- Gokai Yellow (ゴーカイイエロー Gōkai Ierō, Voice): Mao Ichimichi (市道 真央 Ichimichi Mao)
- RyusoulGreen (リュウソウグリーン Ryūsoru Gurīn, Voice): Yuito Obara (小原唯和 Obara Yuito)
- RyusoulBlack (リュウソウブラック Ryūsoru Burakku, Voice): Tatsuya Kishida (岸田タツヤ Kishida Tatsuya)
- Keiichiro Asaka (朝加圭一郎 Asaka Keiichirō): Kousei Yuuki (結木滉星 Yūki Kōsei)
- Eiji Takaoka (高丘 映士 Takaoka Eiji): Masayuki Deai (出合 正幸 Deai Masayuki)
- Sosuke Esumi (江角 走輔 Esumi Sōsuke): Yasuhisa Furuhara (古原 靖久 Furuhara Yasuhisa)
- Doggie Kruger (ドギー・クルーガー Dogī Kurūgā, Voice): Tetsu Inada (稲田 徹 Inada Tetsu)
- Announcer: Shinichiro Ohta (太田 真一郎 Ōta Shin'ichirō)
- Legendary Heroes (Voices): Shunsuke Kanie (蟹江俊介 Kanie Shunsuke), Yukiko Motoyoshi (元吉有希子 Motoyoshi Yukiko), Erika Sakata (坂田 恵理歌 Sakata Erika), Takumu Miyazono (宮園 拓夢 Miyazono Takumu)
- Gokai Blue (ゴーカイブルー Gōkai Burū): Yuki Yamada (山田 裕貴 Yamada Yūki) (archive audio only)
- Gokai Green (ゴーカイグリーン Gōkai Gurīn): Kazuki Shimizu (清水 一希 Shimizu Kazuki) (archive audio only)
- Gokai Pink (ゴーカイピンク Gōkai Pinku): Yui Koike (小池 唯 Koike Yui) (archive audio only)
- Gokai Silver (ゴーカイシルバー Gōkai Shirubā): Junya Ikeda (池田 純矢 Ikeda Jun'ya) (archive audio only)
- Zyuoh Eagle: Ryuta Hara (原 隆太 Hara Ryūta)
- Gokai Red: Kohei Matsuoka (松岡 航平 Matsuoka Kōhei)
- Sasori Orange: Daiki Suzuki (鈴木 大樹 Suzuki Daiki)
- AkaNinger: Shinya Shimokawa (下川 真矢 Shimokawa Shinya)
- ToQ 5gou: Kana Iwasaki (岩崎 香奈 Iwasaki Kana)
- Gaisorg: Riichi Seike (清家 利一 Seike Riichi)
- Patren 1gou: Masashi Takada (高田 将司 Takada Masashi)
- Bouken Silver:
- Go-On Red:
- Gokai Silver:
- Gokai Pink:
- Gokai Green:
- Gokai Blue:
- Doggie Kruger:
- RyusoulGreen: Masato Tsutamune (蔦宗 正人 Tsutamune Masato)
- RyusoulBlack: Yasuhiro Takeuchi (竹内 康博 Takeuchi Yasuhiro)
Form Changes and Collectibles Used
- Go-On Red - N/A
- Gokai Changes in Battle1: Who is the Strongest in History!?:
- ToQ 5gou - N/A
- AkaNinger - N/A
Zyuohger Form Changes
- Zyuoh Eagle - N/A
- Sasori Orange - N/A
- Patren 1gou - N/A
- As part of Super Hero Time, this episode aired alongside Kamen Rider Zi-O episode 23, It's Kikai! 2121.
- Kagura is the only member of the Oddball Team to not transform this episode.
- Rather than using replacement voice actors, archive audio is used for Marvelous' Gokaiger teammates as they are struck by Gaisorg, specifically audio from their fight with Basco in Gokaiger episode 47.