Clash! Ultra Big Match! (激突！ ウルトラビッグマッチ！ Gekitotsu! Urutora Biggu Macchi!) is the twenty-third episode of Ultraman Taiga.
A trio of aliens recreate Ultraman Belial using his genetic material. Ultraman Zero shows up to help Taiga battle against the imitation.
At a corner of one building, Mabuze tells the aliens that they will now eliminate those warriors. The alien summons the imitation dark warrior that the hunt begins.
Alien Zarab, Alien Godola, and Alien Sran sought out Mabuze's help in defeating Tri-Squad and Tregear so that they could stand unopposed. Pirika counts the golden fishes, Kana works on the computer, Homare punches a punching bag, and Hiroyuki still sleeping on a notebook. The clock strikes 12 that it's lunchtime. Aliens saw the dark warrior's genes that Mabuze's experiment will get ready. Sran presses a button that the genes start spinning. Members pick a miso that Hiroyuki and Homare playing "rock, paper, scissors", which means he won. Aliens saw a camera that testing a live video, watched by members that Hiroyuki leave. As Imit-Ultraman Belial destroys the city, he uses Taiga Spark but fork avoided that he transforms into Taiga. Imit-Belial went on a rampaging spree and fight against Tri-Squad, surpassing each of them in strength, speed and firepower.
Tregear joined the fray, wanting to get rid of Imit-Belial for interfering with his plans. His mocking of him leads to Mabuze that they had to give it a power boost using additional Belial cells when Tregear appeared. Ironically, this became their undoing as Tregear led the Belial clone to destroy the building that the aliens were in, crushing them under the rubble. As Taiga quickly upgraded into Photon-Earth, Imit-Belial's claws slash Taiga before landing on a ground. As he's on the brink of defeat, Imit-Belial performs Death Light Ring to defeat the hero, but dodged by Zero Sluggers, putting back to the son of Seven, Ultraman Zero, who appeared just in time to help Taiga to fuse members into Tri-Strium.
The two face off against the two dark warriors. After their beam struggle ended in a tie, Taiga made use of Plasma Zero-let to initiate Taiga Dynamite Shoot and open fires on the Imit-Belial, who Tregear used as a meat shield. Imit-Belial was destroyed while Tregear escaped unharmed. After the battle, Zero leaves once again using Ultimate Aegis, but not before giving some words of encouragement to Hiroyuki and Tri-Squad, much to Kirisaki watching that the fun party begins. Back in the HQ, after Pirika stops working, she saw a comet, almost coming to Earth.
Where Is the Superior's Judgement? (目上の人かの判断ってどこでする？ Meue no Hito ka no Handan tte dokode suru?)
While Titas pays his respects to Zero, he finds out that Zero is actually younger than him.
- Hiroyuki Kudo (工藤ヒロユキ Kudō Hiroyuki): Yuki Inoue (井上 祐貴 Inoue Yūki)
- Homare Soya (宗谷ホマレ Sōya Homare): Ryotaro (諒太郎 Ryōtarō)
- Pirika Asahikawa (旭川ピリカ Asahikawa Pirika): Ayuri Yoshinaga (吉永 アユリ Yoshinaga Ayuri)
- Kana Sasaki (佐々木カナ Sasaki Kana): Chiharu Niiyama (新山 千春 Nīyama Chiharu)
- Kirisaki (霧崎 ): Kou Nanase (七瀬 公 Nanase Kō)
- Ultraman Taiga (ウルトラマンタイガ Urutoraman Taiga): Takuma Terashima (寺島 拓篤 Terashima Takuma)
- Ultraman Titas (ウルトラマンタイタス Urutoraman Taitasu): Satoshi Hino (日野 聡 Hino Satoshi)
- Ultraman Fuma (ウルトラマンフーマ Urutoraman Fūma): Shota Hayama (葉山 翔太 Hayama Shōta)
- Ultraman Tregear (ウルトラマントレギア Urutoraman Toregia): Yuma Uchida (内田 雄馬 Uchida Yuma)
- Ultraman Zero (ウルトラマンゼロ Urutoraman Zero): Mamoru Miyano (宮野 真守 Miyano Mamoru)
- Alien Sran (スラン星人 Suran Seijin): Kōki Hisada (久田 康樹 Hisada Kōki)
- Alien Zarab (ザラブ星人 Zarabu Seijin): Jun Fukazawa (深澤 純 Fukuzawa Jun)
- Alien Godola (ゴドラ星人 Godora Seijin): Tatsuya Tōjō (東條 達也 Tōjō Tatsuya)
- Ultraman Taiga: Hideyoshi Iwata (岩田 栄慶 Iwata Hideyoshi)
- Ultraman Titas: Yoshiki Kuwahara (桑原 義樹 Kuwahara Yoshiki)
- Ultraman Fuma: Satoru Okabe (岡部 暁 Okabe Satoru)
- Ultraman Tregear: Shinnosuke Ishikawa (石川 真之介 Ishikawa Shinnosuke)
- Imit-Ultraman Belial: Daisuke Terai (寺井 大介 Terai Daisuke)
- Alien Zarab: Daiki Yazaki (矢崎大貴 Yazaki Daiki)
- Ultraman Taiga
- Ultraman Titas
- Ultraman Fuma
- Ultraman Zero
- Ultraman Tregear
- Imit-Ultraman Belial
- The instant noodle cups that the EGIS members were about to eat from have the names of Ultraman Zero's three past human hosts, written in Kanji words.
- Hiroyuki Kudo grabs a fork during his transformation scene before discarding it. This is a reference to the famous moment when Shin Hayata lifts a spoon instead of his Beta Capsule in episode 34 of Ultraman.
- There seems to be at least two references to the popular series JoJo's Bizarre Adventure.
- The scene where Titas and Imit-Belial punch each other while shouting battle cries prominently references the Stand Rush between Jotaro's Star Platinum and DIO's The World in Part 3, Stardust Crusaders, made even more apparent by Titas' star motif and battle cries alluding to Star Platinum.
- Before getting crushed, Mabuze declares "Chi-Chibull science is the best in the universe!". Rudol von Stroheim, a German Nazi soldier-turned-cyborg introduced in Part 2, Battle Tendency, is known for declaring that "German science is the best in the world!".
- This episode's title is a reference to the title of episode 49 of Ultraman Taro.
- The building that Imit-Belial uses as a shield received damage from Fuma's Light Wave Shurikens; however, in the next shot, it is shown to be damage-free.