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Ultraman Zearth

Ultraman Zearth (ウルトラマンゼアス, Urutoraman Zeasu) is a fictional giant superhero and titular protagonist of the 1996 Japanese tokusatsu film Ultraman Zearth, produced by Tsuburaya Productions as part of the long-running Ultraman franchise celebrating its 30th anniversary. Hailing from the Land of Sparkles in Nebula Z95, Zearth is an Ultra warrior dispatched to protect Earth from kaiju and alien threats, with a particular focus on environmental dangers like pollution, while adopting the human alias Katsuto Asahi, a young recruit in the defense organization MYDO (Mysterious Yonder Defense Organization). Despite his immense physical power—making him one of the strongest Ultras—he is notably hindered by personal flaws, including severe mysophobia (fear of dirt and germs) and battle anxiety, which often lead to comedic and dramatic moments as he transforms using a special toothbrush and strives to overcome his insecurities. Zearth's debut film portrays his arrival on Earth amid an alien invasion by the Benzene species, where he battles the kaiju Cotton-Poppe while learning the value of courage and environmental stewardship. The character returned in the 1997 sequel Ultraman Zearth 2: Superhuman Big Battle - Light and Shadow, facing new adversaries including the dark warrior Ultraman Shadow, further exploring themes of self-improvement and planetary defense in a story set around the turn of the millennium. Beyond the films, Zearth has made guest appearances in later Ultraman media, such as the 2022 web series Ultra Galaxy Fight: The Destined Crossroad, where he aids other Ultras against the Absolutian invaders, voiced in English by actor Robert Baldwin. These portrayals highlight Zearth's growth from a flawed hero to a symbol of resilience, blending high-energy action with messages about facing fears and preserving the natural world.

Overview

Premise

Ultraman Zearth is a distinctive warrior hailing from the Land of Sparkles in Z95, known for his extreme and intense aversion to dirt and germs. This germaphobic hero merges with his human host, Katsuto Asahi—a young man afflicted by similar hypochondriac tendencies—to protect from invaders seeking to exploit the planet's resources. The duology portrays Zearth's transformation and battles as a for personal vulnerability, where his oversized red facial features and toothbrush-based transformation device symbolize his quirky, hygiene-obsessed nature. At its core, the premise explores themes of overcoming self-doubt and phobias in the pursuit of heroism, as Zearth must confront his fears to effectively defend against alien conquests. This narrative arc is enriched by an environmental motif, emphasizing the fight against and the despoilment of Earth's by opportunistic extraterrestrials, who view the planet as a resource to plunder. Through Zearth's struggles, the story underscores the interplay between individual growth and for planetary stewardship. Assisting Zearth is MYDO, the Mysterious Yonder Defense Organization, a ragtag Earth defense team composed of eccentric members who monitor and respond to and alien threats with limited resources and unconventional tactics. Operating from a makeshift base that reflects their underdog status, MYDO provides crucial support to Zearth, highlighting themes of teamwork and perseverance amid adversity. The organization's humorous yet dedicated approach complements the duology's blend of parody and earnest action, positioning it as a lighthearted entry in the Ultra Series.

Format and releases

Ultraman Zearth is structured as a two-part film duology produced by , featuring live-action sequences combined with suitmation techniques to depict giant-scale battles. The first entry, Ultraman Zearth, premiered theatrically in on March 9, 1996, with a runtime of approximately 51 minutes. The follow-up, Ultraman Zearth 2: Superhuman Big Battle – Light and Shadow, was released in theaters on April 12, 1997, running for about 66 minutes. Home video distribution began soon after the theatrical runs, including a edition of the first film issued in on August 1, 1996. tapes followed, handled by . Subsequent re-releases arrived on DVD in 2004 via as a combined edition of both films. In 2016, launched a Blu-ray version collecting the duology, totaling around 116 minutes of main content in . In 2022, Mill Creek Entertainment released a DVD edition with English in . By the , the films became accessible via streaming on ' official YouTube channel and services like .

Plot

Ultraman Zearth (1996)

Ultraman Zearth, originating from the Land of Pikari in Nebula Z95, arrives on with the mission to defend it from evil forces and cleanse its pollution. He assumes the human guise of Katsuto Asahi, a hygiene-obsessed individual who joins the Mysterious Yonder Defense Organization (MYDO), an Earth defense team operating under the cover of a gas station. Due to his severe germophobia, Katsuto is relegated to cleaning duties rather than frontline combat, often washing his hands excessively and avoiding dirt at all costs. Meanwhile, the Alien Benzen from Planet Benzene lands on Earth, masquerading as the businessman Akuma Ogami. Suffering from a chronic illness known as gas overdose syndrome, Benzen seeks to plunder Earth's reserves as the only cure, while his actions inadvertently weaken the planet through environmental disruption. To execute his plan, he summons his loyal bodyguard, Cotton-Poppe, which rampages across sites like Ultraman Land, using its extendable tongue to absorb and convert it into destructive energy particles or waves. Benzen's scheme escalates as he taunts MYDO at their headquarters by spreading dirt, unknowingly uncovering Zearth's vulnerability. Katsuto's life changes when he encounters the essence of Ultraman Zearth, granting him the Pikari Brush—a device resembling an —that allows transformation by brushing his teeth and holding it aloft, triggering a blinding light. In his initial clashes with Cotton-Poppe, Zearth deploys physical strikes and energy attacks but falters due to the Kaiju's cotton-like fibrous body and the filth it scatters during battle, triggering Katsuto's and causing hesitation. Cotton-Poppe's abilities, including burrowing and the risk of self-detonation from excess absorption, make the fights grueling, with Zearth unable to safely use his signature Spachouchoura Beam on the surface for fear of a massive explosion. The MYDO team provides backup with their jets like the Sky Fish, but their efforts highlight Zearth's personal struggle. Benzen capitalizes on Zearth's weakness by creating tar pits and abducting MYDO members, including Tohru Hoshimi, along with children, luring Zearth into a polluted trap where filth hampers his movements. In the climax, as Benzen deploys Cotton-Poppe for a final assault amid the captives, Zearth draws strength from the encouragement of the humans he vows to protect, conquering his germophobia to endure the grime. He delivers a powerful Zearth Knee Kick to subdue the , propelling it into Earth's orbit away from populated areas. There, Zearth finishes Cotton-Poppe with the , preventing any catastrophic blast. Turning to Benzen, Zearth overpowers the invader and kicks him into deep , thwarting the and restoring peace to the planet.

Ultraman Zearth 2 (1997)

In Ultraman Zearth 2: Superhuman Big Battle - Light and Shadow, the story picks up with the return of Alien Lady-Benzen, a vengeful member of the alien race intent on avenging her predecessor's prior defeat by targeting once more. She creates the robotic warrior Ultraman Shadow, a dark doppelganger of Zearth, to assassinate him. Lady-Benzen forms an alliance with the extraterrestrial entity Miraclon, leveraging its powers to awaken and unleash ancient monsters long dormant beneath the planet's surface, escalating the threat to global security. This conspiracy unfolds as MYDO, the defense organization, struggles to respond amid the chaos, with Ultraman Zearth—embodying his host Katsuto Asahi in an enhanced role following his experiences in the previous conflict—stepping up after an initial defeat by Shadow. The introduces Darklar, a massive subterranean roused from its underground lair by the aliens' disruptive interference, which rampages through urban areas and challenges MYDO's conventional forces. Compounding the crisis is Digital Kanegon, a cybernetically enhanced variant of the greedy obsessed with amassing wealth, programmed by the invaders to sow economic disruption and distract human authorities while the larger invasion advances. Zearth, now more resolute, collaborates closely with MYDO's experimental units, deploying coordinated assaults against these multifaceted foes in high-stakes battles that test his growing confidence and tactical adaptability. As the narrative builds to its climax, after intense training to regain his confidence, Zearth confronts Shadow in an epic battle. Lady-Benzen threatens planetary destruction, but Zearth defeats Shadow using the Cross Spachouchoura Beam, neutralizing the invasion and restoring peace to . This resolution highlights Zearth's evolution from a hesitant defender to a heroic pillar, solidifying his bond with humanity against cosmic perils.

Characters

Ultraman Zearth

Ultraman Zearth is the central heroic figure in the two-part OVA series produced by , serving as a of the classic warriors while embodying a unique germaphobic personality that influences his approach to battle. Hailing from the Land of Sparkles in Nebula Z95, he is a 9,500-year-old who arrives on to defend it against invaders, often struggling with his aversion to dirt and unclean environments that can hinder his performance in combat. His physical form measures 60 meters in height and weighs 54,540 tons, emphasizing his imposing yet youthful presence as a defender. The Ultra's human host is Katsuto , a young member of the defense organization MYDO who leads a dual life balancing his duties as a trainee with his secret role as Earth's protector. Transformation into Ultraman Zearth occurs through the use of the Pikari Brush, a special that allows Asahi to merge with the Ultra's essence during moments of crisis, enabling him to grow to giant size and engage threats directly. This mechanic underscores the character's comedic and relatable elements, tying his activation to everyday human routines amid high-stakes confrontations. In combat, Ultraman Zearth relies on a combination of physical prowess and -based techniques tailored to his clean-freak nature. Key abilities include the Zearth Kick and Zearth Punch, powerful melee strikes that deliver devastating force against monsters, as well as the Spachouchoura , a more powerful "X"-style . His signature finisher, the Spachouchoura , is a "+"-style fired from extended arms, capable of obliterating foes with concentrated . These moves are occasionally compromised by his germaphobia, such as when he hesitates in muddy or polluted battlefields, requiring him to prioritize mid-fight—for instance, avoiding direct contact with soiled enemies. In the second OVA, Ultraman Zearth continues to face escalating threats in his standard form, highlighting his growth from a hesitant warrior to a more confident hero through personal development and intense battles.

MYDO organization and members

The Mysterious Yonder Defense Organization (MYDO) is an international defense force dedicated to protecting Earth from kaiju and extraterrestrial threats, functioning as a subsidiary of the broader International Defense Force. Established with a focus on combating monster attacks, MYDO operates on a notably low-budget basis, relying on ragtag, improvised tactics that infuse their missions with humorous and unconventional elements. Their secret headquarters is disguised as an unassuming gas station, allowing the team to blend into everyday life while maintaining operational secrecy. MYDO's structure emphasizes a small, close-knit of specialists who handle , , and direct engagement. The plays a vital to Ultraman Zearth by providing logistical , , and technological countermeasures against strategies, such as environmental tactics employed by invaders. This collaboration highlights MYDO's ingenuity in developing adaptive tools and vehicles for ground and aerial during battles. Key members of MYDO exhibit distinct personalities that contribute to the team's dynamic operations. In the 1996 film, leadership falls to Captain Shinpei Ohkohchi, portrayed by , a quick-thinking expert who directs missions with strategic acumen and fosters team morale amid chaotic scenarios. His deputy, Futsukichi Konakai, played by , handles administrative and field coordination with a pragmatic, no-nonsense approach, ensuring the team's ragtag efforts remain cohesive. Tohru Hoshimi, enacted by , serves as the primary analyst, leveraging her sharp observational skills to process data and predict threats, often providing crucial insights that aid Zearth's interventions. A standout figure is Katsuto Asahi, played by Masaharu Sekiguchi, whose germophobic tendencies limit him to trainee and janitorial roles, creating comedic tension within the team; however, his underlying determination proves essential in supporting Zearth's defense efforts. In the 1997 sequel, Captain Ban Satsuma, portrayed by , assumes command, bringing experienced leadership and tactical depth to MYDO's operations. Additional personnel include Manabu Kazu, a technically proficient vice-captain skilled in hacking and engineering, and Ganta Takemura, who contributes to field support. MYDO's arsenal includes specialized mecha and vehicles tailored for confrontations. Notable among these is the Sky Fish, a bi-wing aircraft featuring laser cannons for aerial reconnaissance and combat, enabling rapid response to threats. In the sequel, the Sky Shark serves as a massive , facilitating large-scale deployments and transport for ground units during intense engagements. Ground support relies on MYDO tanks and utility vehicles, which allow the team to engage in close-quarters battles and provide Zearth with tactical advantages against pollution-based alien incursions.

Antagonists and monsters

The primary antagonists in the Ultraman Zearth OVAs are extraterrestrial invaders and kaiju that threaten through invasive tactics and destructive capabilities. In the first installment, Alien Benzene serves as the central villain, a shape-shifting alien from Planet Benzene who infiltrates by disguising himself as a and employing pollution-generating to weaken the planet's defenses. He further escalates the conflict by utilizing cloning to create Ultraman Shadow, an evil robotic duplicate of the hero designed to counter Ultraman Zearth in battle. Alien Benzene's mate, Lady-Benzene, emerges as the main antagonist in the sequel, seeking revenge for her husband's defeat by launching a new invasion with advanced shape-shifting abilities and manipulative strategies targeting society. Among the kaiju featured, Cotton-Poppe appears in the initial film as a monster that absorbs cotton materials and environmental debris to rapidly grow in size and strength, posing a in urban areas until confronted. Its vulnerability to fire-based attacks highlights a key weakness exploited in the narrative. In the second OVA, Miraclon is introduced as an ancient guardian entity corrupted into a destructive force, rampaging after being awakened and manipulated by influences. Darklar, a burrowing kaiju awakened by extraterrestrial interference in Ultraman Zearth 2, unleashes seismic attacks by tunneling through the earth, causing widespread earthquakes and structural damage as part of the invaders' plan to destabilize the planet. Digital Kanegon manifests as a robotic kaiju fixated on monetary systems, hacking into financial networks to sow economic chaos and support the alien agenda by disrupting human infrastructure. Additionally, capsule monsters such as Miraclon and Darklar are briefly summoned in antagonistic contexts during battles, serving as temporary allies to the villains before being repurposed in the conflicts.

Production

Development

Ultraman Zearth was conceived by in the mid-1990s as part of efforts to revive the franchise following a 15-year hiatus in new Japanese Ultraman productions since Ultraman 80 ended in 1981. The project, produced in collaboration with Sony Pictures Entertainment, , and distributed by , emerged amid the Heisei era's early stages, aligning with the upcoming television series launch in 1996, while aiming to inject fresh appeal through a comedic, flawed to contrast the more heroic tones of prior Ultras. The screenplay for the first installment was written by Hideyoshi Nagasaka, who incorporated environmental motifs centered on cleanliness and planetary defense to differentiate from standard battle formulas, reflecting Zearth's obsessive personality flaws for relatability and humor. A major collaboration with provided sponsorship, tying the narrative to the promotion of "Zearth Gasoline" as an eco-friendly fuel, which shaped the story's focus on safeguarding Earth's beauty. Budget considerations and the project's anniversary scope led to its format as a 51-minute feature within the omnibus film The Wonderful World of Ultraman, rather than a full television series. Tsuburaya also partnered with for merchandise integration, including Zear Capsule toys that mirrored in-story devices for summoning allies, boosting commercial tie-ins. Development of the sequel, Ultraman Zearth 2, followed the first film's success in 1996, expanding unresolved elements like Zearth's vulnerabilities while shifting toward greater emphasis on and martial themes. Kazunori Saito drew from action comedies but toned down the for a more balanced tone, aligning with traditional values of justice. Resource limitations directed the second entry to a release, allowing deeper exploration of character growth without the theatrical constraints of the original.

Design and special effects

The suit for was designed by ' costume team, led by character designer Chisato Sugiura, featuring a distinctive silver body with red accents and a red mask inspired by ancient war helmets to evoke a sense of heroic tradition while emphasizing the character's bumbling, purity-obsessed persona. This marked the first use of a spandex-based suit in a production, allowing greater flexibility for the suit actor during action sequences and comedic gags related to Zearth's germaphobia, such as exaggerated reactions to dirt and grime that required lightweight, non-restrictive materials. Special effects for the first film were handled by under director Shinya Nakajima, who also served as special effects supervisor, employing traditional methods like miniatures for environmental destruction scenes, including detailed models of the base to simulate rampages. were integrated into beam battles and climactic explosions, notably in the second OVA's finale where Shadow's defeat involved controlled blasts to depict energy overloads, enhancing the visceral impact of the fights without relying solely on digital augmentation. Special effects for the sequel were also managed by , directed overall by Konaka. Monster suits, crafted by the production's design team under Minoru Yoshida, incorporated practical materials to support narrative elements; for instance, Cotten-Poppe's fluffy exterior used absorbent fabrics to visually represent its gold-absorbing ability during pollution-themed confrontations, allowing performers to manipulate the suit for dynamic, tactile interactions like and environmental hazards. Other antagonists, such as Darklar and Miraclon in the , featured reinforced and constructions for outdoor battles, emphasizing durability against practical effects like debris and water simulations. In for Ultraman Zearth 2, enhancements included expanded integration across six specialized teams to handle complex sequences, particularly for Digital Kanegon—a robotic character—where digital glitches and scanning effects were rendered to portray its cybernetic malfunctions and interactions with the MYDO organization's systems, marking a step up from the first film's more limited 250 digital cuts completed in . This blend of practical miniatures, pyrotechnics, and targeted maintained the aesthetic while accommodating the sequel's themes of and environmental threats.

Cast and crew

Cast

Masaharu Sekiguchi stars as Katsuto Asahi, the human host of Ultraman Zearth, infusing the hypochondriac character's comedic struggles with his background as the former manager of the renowned Japanese comedy duo Tunnels. His performance returns in the 1997 sequel, Ultraman Zearth 2: Superhuman Big Battle - Light and Shadow, maintaining continuity for the protagonist's arc. Takaaki Ishibashi portrays Shinpei Ohkohchi, a key member of the MYDO defense organization, leveraging his expertise as one half of the comedy duo Tunnels to deliver humorous banter amid the action sequences. Noritake Kinashi plays Butsukichi Konakai, another MYDO operative, contributing to the ensemble's lighthearted dynamic through his established comedic timing from the same duo. Both actors reprise their roles in the sequel, enhancing the series' comedic tone with their improvisational flair. Yuka Takaoka appears as Tohru Hoshimi, a dedicated MYDO , providing a grounded contrast to the comedic leads across both OVAs. Hiromoto Okubo embodies Ganta Takemura, another MYDO team member, supporting the organization's efforts in the original film and its follow-up. The casting emphasizes performers with comedic backgrounds to align with the OVAs' elements, including guest spots by humorists in and monster roles for added satirical humor.

Production staff

The first installment, Ultraman Zearth (1996), was directed by Shinya Nakajima, a tokusatsu veteran from affiliates who also oversaw the . The screenplay was crafted by Shūkei Nagasaka, known for his work on earlier Showa-era Ultraman entries, emphasizing a mix of comedic elements and high-stakes action sequences. Executive production was led by Kazuo Tsuburaya, son of the company's founder and a key figure in overseeing budgets and merchandising ties, alongside , who managed operational aspects including collaboration with sponsor . Additional producers included Kiyoshi Suzuki, Shigeki Ishimatsu, Tsuneyuki Morishima, and Yoshiyuki Isomura, handling logistics and distribution through . The original score was composed by James Shimoji, incorporating energetic themes that underscored the film's lighthearted tone. For the sequel, Ultraman Zearth 2: Superhuman Big Battle - Light and Shadow (1997), Kazuya Konaka took on directing duties as well as supervision, bringing his experience from prior Tsuburaya projects to enhance the visual spectacle. The script was written by Kazunori Saito, who focused on deepening character arcs while maintaining the series' blend of humor and heroism. Executive producers remained Kazuo Tsuburaya, ensuring continuity in production vision, with Hiroshi Goto joining to coordinate the expanded narrative and effects budget. James Shimoji returned to compose the score, delivering thematic music that amplified the film's themes of light versus shadow. Planning was handled by Takahito Iida, who contributed to story development and resource allocation.

Release and media

Home video release

The home video distribution of Ultraman Zearth began in with and formats shortly after the theatrical releases of the two films. The first film received a release on August 1, 1996, under the title Ultraman Wonderful World. editions followed in 1997, distributed by , with the initial volume covering the 1996 film and a subsequent release for the 1997 sequel. DVD compilations arrived later, compiling both films as Ultraman Zearth 1 & 2 on August 27, 2004, from ; the set included 116 minutes of main content plus 28 minutes of special features in standard definition. A high-definition remaster followed on Blu-ray, again as Ultraman Zearth 1 & 2, released December 22, 2016, by in with linear PCM stereo audio and additional extras like making-of footage and trailers. Internationally, availability expanded in the . Mill Creek Entertainment issued a DVD double feature edition with English on October 11, 2022, targeting North American markets and including both films in a 116-minute runtime. Limited regional releases occurred in , such as a Thai PAL DVD in the early . Digital streaming became accessible globally from the late 2010s, with both films available on Amazon Prime Video in HD with Japanese audio and English subtitles. Tsuburaya Productions further promoted the series via their official YouTube channel, streaming Ultraman Zearth 2 split into two parts with English subtitles starting November 6, 2025, available for a limited time until approximately November 20, 2025, as part of the Ultra Series 60th Anniversary Project.

Video games and adaptations

Ultraman Zearth received a direct adaptation with the 1996 PlayStation title Ultraman Zearth, developed and published by Tohoku Shinsha Film Corporation exclusively in . This game blends elements with mechanics, allowing 1 to 5 players to navigate a parody-style where they control Ultraman Zearth and allies to battle monsters like Cotton-Poppe and Alien Benzene in turn-based encounters featuring 2D cartoon graphics. The title captures the comedic tone of the films, emphasizing Zearth's persona and aversion to dirt through humorous events and monster confrontations. The character also features in crossover fighting games from the Daikaijuu Battle series, which pit Ultras and against each other in arena battles. In Daikaijuu Battle: Ultra Coliseum DX for the , released in 2010 by Games, Zearth is a playable fighter with a moveset including signature attacks like the Zearcium Beam, and includes versus modes against opponents such as Shadow. Earlier entries in the series, such as the PlayStation 2's Daikaijuu Battle: Ultra Coliseum from 2005, incorporate Zearth in team-based combat rosters alongside other heroes. These appearances expand Zearth's role in the broader franchise's interactive media, focusing on fast-paced, one-on-one duels that highlight his agile fighting style. Merchandise adaptations have further extended Ultraman Zearth's presence, particularly through Bandai's toy lines tied to the film promotions in the late 1990s. Capsule toy series like Gashapon Ultra Capsule include Zearth figures as collectible items, often bundled with accessories representing his battles against Cotton-Poppe. Additionally, the Ultra Hero Series offers soft vinyl figures of Zearth, approximately 4-5 inches tall, designed for display and compatible with monster playsets from the era. Premium sets, such as the Ultimate Luminous Ultraman Zearth, feature glow-in-the-dark elements and include antagonists like Alien Benzene, reflecting key film events. In November 2025, Bandai announced an S.H.Figuarts action figure of Ultraman Zearth, with details to be announced.

Legacy

Reception

Ultraman Zearth (1996) holds an average user rating of 6.0 out of 10 on , based on 1,147 ratings as of November 2025, while its , Ultraman Zearth 2 (1997), fares slightly better at 6.8 out of 10 from 1,097 ratings. These scores reflect a mixed , with viewers often praising the OVAs' humorous tone and lighthearted parody of the Ultraman formula, particularly Zearth's quirky, germaphobic personality that adds comedic flair to the action. The environmental messaging, centered on themes of and planetary protection, has also been highlighted as a positive element, aligning with trends. Among enthusiasts, particularly in , the series garnered popularity for its unique take on the hero's character, blending humor with familiar battles, though it remains a niche entry compared to mainline entries. Reviews appreciate the efficient use of the short runtime, with no dragging in the action sequences. In modern retrospectives, the OVAs are viewed as enjoyable side stories within the , appreciated for their fun, self-aware rather than high-stakes . Renewed interest has emerged in the through streaming availability on platforms like , contributing to viewership spikes among new and nostalgic audiences.

Cultural impact and crossovers

Ultraman Zearth's duology introduced the germaphobic Ultra trope to the franchise, portraying the hero as overly fearful of dirt and grime due to his mission against pollution, a personality quirk that added comedic depth to the typically stoic Ultras and influenced later characters' eccentric traits, such as Ultraman Zero's humorous quirks. In terms of crossovers, Zearth has appeared in Ultra Galaxy Fight: The Destined Crossroad (2022), where he joins other Ultras in a multiverse-spanning conflict orchestrated by the villain Absolute Tartarus, marking a significant return for the character after decades and expanding the interconnected Ultra universe. Zearth also features in various fighting games within the series, allowing fans to pit him against other Ultras and kaiju. Ultraman Shadow, Zearth's robotic nemesis from the second film, has become a recurring dark Ultra villain, with recreations and variants appearing in media like Ultra Galaxy Fight and Ultraman Regulos: First Mission (2023), solidifying his role as a persistent antagonist archetype. The merchandise legacy of the Zearth films endures through Bandai's ongoing product lines, including soft vinyl figures like the ULTRA HERO SERIES EX Ultraman Zearth released in 2022, compatible with monster playsets for interactive battles. Pre-orders for additional Zearth figures, such as the Original Colour Version in the Ultraman's Battle Brigade Series, continued into late 2024, while replicas of his signature Zearkey Sword have been incorporated into Bandai's Ultra Replica series and accessory lines throughout the 2020s. In 2025, a special S.H.Figuarts Ultraman Zearth figure for the franchise's 60th anniversary was displayed at Tamashii Nation, appealing to collectors and sustaining the character's visibility. On a broader level, the Zearth OVAs played a key role in maintaining the Ultra brand's momentum during a transitional period following the end of earlier TV entries, highlighting OVAs as a flexible format for anniversary celebrations and experimental storytelling amid the franchise's revival in the late . The duology's emphasis on —particularly combating industrial and promoting cleanliness—foreshadowed deeper ecological motifs in subsequent series like (1998–1999), which centered on humanity's coexistence with Earth through the and threats to the planet's balance.

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