Momoko 120%

Lore & Background

Momoko 120% was released in arcades in 1986 by Jaleco. The game was originally conceived as a tie-in to the anime Urusei Yatsura, but for an unknown reason the license was not obtained for the arcade version. As a result, the characters were changed, but the first opening theme of the first anime adaptation, 'Lum's Love Song', still loops throughout the game. The Family Computer port retained the license and was titled Urusei Yatsura: Lum's Wedding Bell.

In the game, players control Momoko, a young Japanese girl who ages by several years each time the player reaches the next level. The goal is to climb several floors by escalator, ladder, or trampoline before a fire below reaches her. She must shoot alien-like enemies and can upgrade her weapon. Hidden doorways lead to minigames or shortcuts. Momoko starts as a four-year-old and ages through five levels, ending as a twenty-year-old bride. After marriage, a new Momoko is born and the cycle repeats.

The Urusei Yatsura version features Lum as the protagonist, with a storyline involving an earthquake tearing the space-time continuum. The player progresses through infant school, elementary, junior high, high school, college, and finally marries Ataru. This version has never been released outside Japan. City Connection later released a modern port/remake of 'Clarice no Wedding Bell' for platforms like Nintendo Switch and PlayStation 4, announced around 2022–2023.

Reader's Guide

Momoko 120% holds significance as a notable arcade platformer from 1986 that was originally intended to capitalize on the popularity of the Urusei Yatsura anime. Its licensing issues led to a unique situation where the arcade version features original characters but retains the anime's theme music, while the home console port kept the license. The game's core mechanic of the protagonist aging through levels was an innovative concept for the time. In Japan, it achieved commercial success, being listed as the 10th most successful table arcade unit of October 1986 by Game Machine. Critical reception was mixed: a review in Beep found the Urusei Yatsura Famicom version 'pretty ordinary' but noted that non-fans might enjoy Lum flying around. Reviewers in Bi-Weekly Famicom Tsūshin found the game unnecessarily difficult, though three complimented its cute appearance, recommending it only to anime or Urusei Yatsura fans. The game's legacy includes mobile phone re-releases in 2006 and three Japan-only mobile sequels: Momoko 1200%, Momoko 1200% in Machigai Sagashi, and Momoko no Kasei Bowling ~La Mars Cup~. The 2025 announcement of a new Family Computer port starring Clarice demonstrates the game's enduring influence.

Did You Know?

• The arcade version was originally intended to be an Urusei Yatsura game, but the license was not obtained for an unknown reason.
• The game's music is 'Lum's Love Song', the first opening theme of the first Urusei Yatsura anime adaptation.
• Momoko ages from four years old to twenty years old across five levels, ending with her marriage.
• A mobile port of the original Momoko 120% was released for i-mode in 2006, but no distinct sequels with the titles 'Momoko 1200%', 'Momoko 1200% in Machigai Sagashi', or 'Momoko no Kasei Bowling ~La Mars Cup~' are known

Origins and the Licensing Glitch

Jaleco's 1986 arcade platformer Momoko 120% carries the fingerprints of a licensing deal that fell through. The game was originally conceived as an Urusei Yatsura title, but for reasons that remain unexplained, the rights to the Rumic World property were never secured for the arcade cabinet. As a result, the characters were swapped out for an original girl named Momoko. Yet the shadow of the lost license lingers in one unmistakable detail: "Lum's Love Song," the opening theme from the first Urusei Yatsura anime series, loops continuously throughout the arcade experience. The situation was partially corrected when the Family Computer port was developed; that version successfully retained the Urusei Yatsura license and shipped under the title Urusei Yatsura: Lum's Wedding Bell. This dual identity—an arcade game with a renamed cast but an anime soundtrack, versus a console game that fully embraced the source material—gives Momoko 120% a curious place in Jaleco's catalog and in the broader history of 1980s Japanese arcade publishing.

The Aging Climb and Cyclical Ending

Momoko 120% is built around a deceptively simple premise with a deeply personal twist. The player guides a young Japanese girl upward through multi-story buildings, racing against a fire that steadily advances from below. Each floor is navigated using escalators, ladders, or trampolines, and the environments shift from grade-school hallways to office-style architecture as the levels progress. Along the way, Momoko must leap over obstacles and fire her weapon at alien-like pursuers that appear on every floor. Destroying specific enemies or completing minigames tucked inside hidden doorways upgrades her arsenal; those same doorways double as shortcuts and occasionally become the only path forward. To clear a level, she must leap onto a small blimp hovering above the topmost floor. The most distinctive mechanic is aging: Momoko begins as a four-year-old and grows several years older with each of the five levels. The finale casts her as a twenty-year-old bride gathering items in a bonus stage, after which she marries, gives birth to a new Momoko, and the entire cycle resets.

Lum's Wedding Bell: The Console's Separate Story

The Family Computer adaptation, released as Urusei Yatsura: Lum's Wedding Bell, tells a narrative distinct from its arcade counterpart. Here the player takes on Lum herself, who must grow from infancy through elementary school, junior high, high school, and college while evading alien invaders and searching for her rescue UFO. The inciting incident is a devastating earthquake in Tomobiki-cho, the fictional town anchoring the Urusei Yatsura franchise, which rips the space-time continuum and forces Lum to travel forward through time to reunite with her beloved Ataru Moroboshi. The game culminates in a wedding where Ataru appears in a white tie outfit, after which the experience loops back to the beginning. Lum's Wedding Bell has never seen a release outside Japan. In 2025, City Connection announced a new Family Computer port of the arcade original, retitled City Connection: Clarice no Wedding Bell, which swaps the protagonist for Clarice, the heroine of the City Connection franchise, while echoing the wedding-bell naming convention.

Reception, Re-releases, and Lasting Footprint

Momoko 120% found solid commercial footing in Japan, with Game Machine ranking it the tenth most successful table arcade unit for October 1986. Critical response to the Famicom spin-off was mixed. Beep's review called the game "pretty ordinary" but acknowledged that even viewers unfamiliar with the source material would enjoy watching Lum zip across the screen. Reviewers at Bi-Weekly Famicom Tsūshin split: two found the difficulty curve unnecessarily punishing, while three praised its visual charm and suggested it was best suited for anime enthusiasts or devoted Urusei Yatsura fans. The title experienced a second life on February 28, 2006, when it was re-released for Japanese mobile phones. That same year saw three Japan-only mobile sequels—Momoko 1200%, Momoko 1200% in Machigai Sagashi, and Momoko no Kasei Bowling ~La Mars Cup~—extending the concept into new formats. Together, these re-releases and spin-offs kept the aging-climb formula in the public eye well past its arcade heyday.