->'''[[BigBad Belial]]:''' Who are you?\\
'''Zero:''' Zero, Ultraman Zero, son of [[Series/UltraSeven Seven!]]

Ultraman Zero is the main character of a sub-franchise of the ''Franchise/UltraSeries'' by Tusburaya Productions, mainly consisting of films. Zero is the son of Series/UltraSeven.

!!The Films
* ''Film/MegaMonsterBattleUltraGalaxyLegends'' (2009): Thousands of years ago, the dark Ultra Warrior Belial rebelled against the Land of Light after gaining the power of [[Series/UltraGalaxyMegaMonsterBattle Reionics]]. Wielding the Giga Battle Nizer, he commanded an army of monsters. Belial was defeated and imprisoned by Ultraman King. Now that Belial is freed, he attacks the Land of Light once again. The Ultras' only hope lie with [[Series/UltraGalaxyMegaMonsterBattle Rei, the human Reionics]] and Zero, an Ultra warrior said to hold unlimited potential.
* ''Film/UltramanZeroTheRevengeOfBelial'' (2010): A group of [[EvilKnockoff Darklopses]] attack the Land of Light. After they are destroyed, it is discovered that they are transmitting energy to a location in another universe. Zero volunteers to investigate and discovers Belial's Galactic Empire.
* ''Film/UltramanSaga'' (2012): Following a plea for help, Zero finds himself in yet another universe where almost all humans on Earth have been abducted. He encounters a young pilot named Taiga, who came from the same universe Series/UltramanDyna & [[Series/UltramanTiga his predecessor]] once called home.

!! Side Stories
Direct-to-video side stories, set between the films, have been produced. The first one, entitled ''Ultra Galaxy Legend Gaiden: Ultraman Zero vs. Darklops Zero'' is set between ''Ultra Galaxy Legends'' and ''Revenge of Belial''. It introduces Darklops as a major enemy. The second side story, ''Ultraman Zero Gaiden: Killer the Beatstar'', is set between the second and third films.

!!''Ultraman Retsuden'' (2011-2016)
A television series in which Zero navigates the viewer through the history of the ''Franchise/UltraSeries''. Most episodes are simply previous ''Ultra Series'' episodes or portions of ''Ultra'' films with the only difference being a new opening theme and commentary by Zero at the end and beginning of the episode.

Some episodes of ''Retsuden'', have an added segment called ''Ultra Zero Fight'', detailing Ultraman Zero's further adventures.

!!''Ultraman Zero: The Chronicle'' (2017)
Another biography series. It serves as the [[MilestoneCelebration 50th anniversary celebration]] of ''Series/UltraSeven''. As in ''Ultraman Retsuden'', Zero navigates the viewers about his involvement in movies and some miniseries.

!!Series and Films with Zero as a Guest Star
* ''[[Series/UltramanGinga Ultraman Ginga S]] The Movie: Showdown! The 10 Ultra Warriors!'': Zero pursues [[BigBad Etelgar]] after Series/UltramanCosmos was defeated by the aforementioned perpetrator. Unfortunately, Etelgar escaped and promised that Zero will be his last target. After meeting Ginga and Victory, the Ultra trains them so they will be able to use the Ultra Fusion Brace given by [[Series/UltramanLeo Ultraman King]]. In the FinalBattle against Etelgar, he assists both Ginga and Victory (as [[FusionDance Ginga Victory]]), along with Cosmos and [[Series/UltramanTiga the]] [[Series/UltramanDyna rest]] [[Series/UltramanGaia of]] [[Series/UltramanNexus Hei]][[Series/UltramanMax sei]] [[Series/UltramanMebius Ultras]]. In the battle, he's forced to fight an Eteldummy of his ArchEnemy Ultraman Belial.
* ''Series/UltramanX''
** Appearing in episode 5, he was chasing an [[Series/ReturnOfUltraman Alien Nackle]] after the alien was reported for being a thief and an arms dealer. He later teams up with the titular Ultra of the series against Nackle and Black King.
** In ''Ultraman X The Movie: Here Comes! Our Ultraman'', Zero battles a Tsurugi Demaaga in Shanghai, China and destroys the kaiju with his Wide Zero Shot after being empowered by Ultraman X's Beta Spark Armor Cyber Wings.
* ''Series/UltramanOrb''
** Despite not appearing in the series, he was the one who sealed Maga-Pandon in ancient times. His Ultra Fusion Card was collected by Gai Kurenai/Ultraman Orb after he defeated Maga-Pandon and used in present times to assume Ultraman Orb Hurricane Slash form. In the FinalBattle against [[spoiler:Magata no Orochi]], he manifests in the real world to help Orb deliver a massive fatal blow against the final Demon King Beast by firing his Wide Zero Shot.
** ''Film/UltramanOrbTheMovieLendMeThePowerOfBonds'': After learning about Murunau's intention turn everything on Earth into her personal collection, Zero sets out to find Gai Kurenai/Orb to inform him about the situation and at the same time help Gai/Orb battle a revived Galactron.
** ''Ultra Fight Orb'': During his investigation in Planet Yomi, Zero encounters a revived Juda Spectre and Mecha Gomora before Orb saves him and defeating both villains. Moments later, the two are greeted by the mastermind Reibatos, as the sorcerer Reionics revives six monsters before heading to the Monster Graveyard. After destroying Vict Lugiel and Hyper Zetton, Zero urges Orb to chase Reibatos before Jack, Seven and Zoffy come to his aid. After Orb failed to intercept Reibatos, Zero and Seven send him into the Shining Field to train him, which allows Orb to utilize his and his father's power as Ultraman Orb Emerium Slugger.
* ''Series/UltramanGeed'': Zero returns in this series, this time as the {{Deuteragonist}} for the titular Ultra. He comes to Earth with Geed, but due to a previous battle, his power weakened, as his Ultimate Bracelet become unusable. He's soon bond with a human named Reito Igaguri, a salaryman who risked his life to protect a child from a traffic accident, therefore saving his life. While Reito prefers watching the battle from afar, Zero's impatient and SpiritedCompetitor nature eventually forces his new host to join Geed as well.

!!''Ultraman Zero'' provides examples of the following tropes:
%% Note: Tropes for individual movies go to their respective pages.%%

* BigBad: Belial in the first two films
* ClipShow: A few ''Retsuden'' episodes.
* {{Crossover}}: Every single film features this.
** The first film features every Ultra Warrior of the classic continuity and has Series/UltramanDyna in a guest role.
** ''Revenge of Belial'' has [[spoiler:Noa of ''Series/UltramanNexus'' aiding Zero.]]
** ''Film/UltramanSaga'' features [[Series/UltramanDyna Dyna]] and [[Series/UltramanCosmos Cosmos]].
* EvilTwin: From ''Ultraman Zero vs. Darklops Zero'' , there are Darklops Zero to Ultraman Zero, Mecha Gomora to Gomora, and army of Robot Ultra Brothers.
* HenshinHero: The Ultras
* LightIsGood: The Ultras are beings of light. The first opening theme of ''Retsuden'' describes them as "red and silver soldiers of light".
* MilestoneCelebration
* MyHeroZero
* NoFourthWall: Zero when presenting the ''Retsuden'' episodes.
* OneWingedAngel: [[spoiler:Belial in the first two films.]]
* SpinOffspring: Zero is the son of Series/UltraSeven.