Kinnikuman Nisei Choujin Seisenshi (J)

Kinnikuman Nisei: Choujin Seisenshi is a fighting game released exclusively for the WonderSwan Color in Japan. It's part of the Kinnikuman franchise, specifically based on the Kinnikuman Nisei (also known as Ultimate Muscle) storyline. The game was published by Banpresto around 2002, though exact release date information is not widely documented. This is a side-scrolling 2D fighter, fitting in with the WonderSwan Color's library of anime-themed brawlers that appeared towards the end of the handheld's life cycle.

What you actually do in the game is select a Choujin (superhuman wrestler) from the available roster and engage in one-on-one matches. The fighting system relies on basic attacks, special moves tied to each character, and a grapple system that mimics the wrestling roots of the franchise. Matches are round-based with a health bar, and you can perform signature techniques by entering specific button combinations on the D-Pad. Since this is a Japanese-only release, menus are entirely in Japanese, so figuring out character selection and options may require some trial and error if you don't read the language.

This title is worth checking out if you're a Kinnikuman fan curious about how the series translated to the WonderSwan platform. It's a simple fighter by modern standards, but it captures the character designs and over-the-top wrestling aesthetic of the source material. Compared to other WonderSwan fighting games, it's fairly typical - nothing groundbreaking, but competent for its time. It's mostly a niche curiosity now, best played for nostalgia or completionism rather than deep competitive gameplay.