Ultraman Zero

"Belial: Who are you? Zero: Zero, Ultraman Zero, son of Seven!"

Ultraman Zero is the main character of a sub-franchise of the Ultra Series by Tsuburaya Productions, mainly consisting of films. Zero is the son of Ultra Seven.

The Films
Mega Monster Battle Ultra Galaxy Legends (2009)

Thousands of years ago, the Dark Ultra warrior, Belial rebelled against the Land of Light after gaining the power of Reionyx. Wielding the Giag 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 Rei, the human Reionyx and Zero, an Ultra warrior said to hold unlimited potential.

Ultraman Zero: The Revenge of Belial (2010)

A group of 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.

Ultraman Saga (2012)

Zero finds himself in yet another universe, defending Earth against an alien fleet. He encounters a young pilot named Taiga, who came from the universe of Ultraman Dyna.

Ultraman Z (2020)

Zero appears as the mentor of Ultraman Z. Z admires Zero and considers him to be a role model.

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
A television series in which Zero navigates the viewer through the history of the Ultra Series. Most episodes are simply previous Ultra Series episodes with the only difference being a new opening theme and commentary by Zero at the end and beginning of the episode.

Tropes for the individual movies are listed on to their respective pages.

Tropes for the series as a whole include:
 * Big Bad: Belial in the first two films.
 * Clip Show: A few Retsuden episodes.
 * Crossover: Every single film features this.
 * The first film features every Ultra Warrior of the classic continuity and has Ultraman Dyna in a guest role.
 * Revenge of Belial has
 * Ultraman Saga features Dyna and Cosmos.
 * Henshin Hero: The Ultras
 * Light Is Good: The Ultras are beings of light. The first opening theme of Retsuden describes them as "red and silver soldiers of light".
 * Milestone Celebration
 * My Hero Zero
 * No Fourth Wall: Zero when presenting the Retsuden episodes.
 * Spin Offspring: Zero is the son of Ultra Seven.
 * Spin Offspring: Zero is the son of Ultra Seven.