Ultra Fight Orb is the third installment of Tsuburaya's Ultra Fight based on the Ultra Series, after Ultra Zero Fight and Ultra Fight Victory, and serves as a continuation of the adventures of Ultraman Orb after the eponymous Ultras series have ended.
Reibatos, a ghost mage and alien sorcerer who can manipulate the soul of any monster, seeks the forbidden weapon, the Giga Battlenizer, to rule the universe. And once again, the fate of every world in existence lies in the hands of the galaxy's protectors, the Ultra warriors...
After defeating a Demaga, Ultraman Orb, still stationed on Planet Earth, has an ominous vision that appears to be a glimpse into the future. Realizing an aura of energy emitting from the slain Demaga is travelling towards the centre of the galaxy, Orb decides to trace it, where he ends up on Planet Yomi, meeting Ultraman Zero who had also sensed the energy. It is there they discover Reibatos and his resurrected monster army, as well as the alien sorceror's sinister plans. Of course, its up to them to stop it.
Thankfully though, Orb and Zero aren't alone in this quest. The Ultra Brothers - Zoffy, Ultraseven and Ultraman Jack, are out looking for Zero after the young warrior failed to return in time, and for the father-son duo Ultraseven and Ultraman Zero, they will guide Ultraman Orb towards his true potential.
Ultra Fight Orb provides examples of the following tropes:
- Action Prologue: Right at the start of the first part, we have Ultraman Orb fighting (and defeating, of course) a Demaga.
- Almost Dead Guy: Reibatos in the last few seconds. Then, a mysterious new Ultra arrives and removes the "almost" part of the trope...
- Back-to-Back Badasses: Ultraman Orb and Ultraman Zero, fighting the resurrected Juda Spectre and Mecha Gomora. And later, the revived kaiju legion of six monsters.
- Big Damn Heroes:
- When Ultraman Zero is on Planet Yomi and being overpowered by the revived Juda Spectre and Mecha-Gomora. Cue Ultraman Orb swooping in and knocking Mecha-Gomora's Rocket Punch aside with a single swoop.
- Later on, when Reibatos' legion turns out to be too strong for Zero to handle... wait, why are they playing the theme songs of Ultraman Jack, Zoffy, and Ultraseven?
- But Now I Must Go: After Reibatos' defeat, the Ultra Brothers offers Orb a place amongst their ranks. Orb promptly declines, stating that he is The Drifter and prefers living that way.
- Continuity Nod: During the original Ultra Brothers' Big Damn Heroes moment, each Ultra gets to confront their old foes: Zoffy gets a rematch against Birdon, Ultraman Jack fights Gudon and Twin Tail, and Ultraseven confronts King Joe.
- Crossover: Ultraman Orb gets to team up with Ultraman Zero, Ultraseven, Zoffy and Ultraman Jack.
- Dynamic Entry: This is how the Ultra Brothers Jack, Zoffy and Ultraseven shows up to meet their own former enemies. Notably, Jack appearing first to deliver a Diving Kick into Gudon's face.
- Early-Bird Cameo: Ultraman Geed (later shown in his titular show to have actually been Belial himself) shows up in the last few seconds, to finish off Reibatos.
- Forced Perspective: One shot near the end of the show uses this effect, when Ultraman Orb, having reverted to the human-sized Gai Kurenai, looks upwards towards the 50 meter tall Ultramen.
- Henshin Hero: Ultraman Orb's human form, Gai Kurenai, who Fusion Ups even in Ultra form in order to change forms. At the end of the series, he reverts himself back to his original human form before leaving.
- Like Father, Like Son: Ultraman Orb notes this distinction between Ultraseven and Ultraman Zero. Especially when he manages to fuse their powers to unlock his new Emerium Slugger form.
- Nigh-Invulnerability: Reibatos, with a Healing Factor taken up to eleven. Capable of surviving being sliced into half before regenerating himself in seconds.
- Ominous Message from the Future: In two occasions, Ultraman Orb had a glimpse of himself in the future obtaining Ultraseven's powers and unlocking his Emerium Slugger mode.
- Orbital Shot: A rather epic one happens when Ultraman Orb starts slicing Reibatos with all three of his Sluggers.
- Rasputinian Death: The eventual demise of Reibatos, being sliced by THREE Sluggers in all directions before getting hit by an energy blast that completely envelops his body. And he actually comes back from that attack, before finally getting killed for good by... Ultraman Geed?
- Sequel Hook: After the apparent demise of Reibatos and departure of Ultraman Orb, the scene goes back to the Monster Graveyard where, surprise surprise, Reibatos is Not Quite Dead, it seems. Then, a mysterious, blue-eyed Ultra with body markings suspiciously similar to Belial suddenly finish off Reibatos, this Ultra is later revealed to be Ultraman Geed but things aren't as they seem.
- Summon Magic: Reibatos, the alien sorcerer who can summon kaiju by resurrecting their souls. His resurrection capacity is somewhat limited though, which is why he seeks the Giga Battlenizer to amplify his powers.
- Theme Music Power-Up: Happens every time when the Ultras are winning. Especially evident when Ultraman Jack, Zoffy and Ultraseven arrive, as their respective theme tunes start playing, before culminating into the "Six Ultra Brothers" theme.
- Wham Line: Delivered by the Not Quite Dead Reibatos in the last few seconds.
- Year Inside, Hour Outside: When Zero transports himself, Orb and Ultraseven into his Shinning Emerium Field. To outside observers, maybe a few minutes have passed, but from the inside, Gai has endured ten years of training from Ultraseven and Ultraman Zero.