When realty TV host Carlos Kurozaki breaks into a mysterious underground pyramid for a television event, he removes a special gem. . . and unwittingly releases a diabolical monster called Zaigorg! The evil creature wants Kurozaki's gem, so it spawns an army of giant kaijus to get it! It's up to the famous superheroes Ultraman X, Ultraman Tiga, and the one and only original Ultraman to stop the worldwide monster war!
| Actor | Role |
|---|---|
 Kensuke TakahashiDaichi Ozora | Daichi Ozora |
 Akane SakanoueAsuna Yamasa | Asuna Yamasa |
 Yoshihiko HosodaWataru Kazama | Wataru Kazama |
 Ukyo MatsumotoHayato Kijima | Hayato Kijima |
 Hayato HaradaMamoru Mikazuki | Mamoru Mikazuki |
 Haruka MomokawaRui Takada | Rui Takada |
 Chiaki SeshimoChiaki Matsudo | Chiaki Matsudo |
 Sarara TsukifuneSayuri Tachibana | Sayuri Tachibana |
 Yū KamioShotaro Kamiki | Shotaro Kamiki |
 Takami YoshimotoTsukasa Tamaki | Tsukasa Tamaki |
| SSerai TakagiYuto Tamaki | Yuto Tamaki |
| YYuka NakayamaSaeko Kirihara | Saeko Kirihara |
| MMichael TomiokaCarlos Kurosaki | Carlos Kurosaki |
 Yuichi NakamuraUltraman X (voice) | Ultraman X (voice) |
 Yasunori MatsumotoGuruman (voice) | Guruman (voice) |
 Hibiku YamamuraNavigation Voice | Navigation Voice |
 Mamoru MiyanoUltraman Zero (voice) | Ultraman Zero (voice) |
 Takuya NegishiUltraman Ginga (voice) | Ultraman Ginga (voice) |