Kinnikuman II-Sei: All Out Chojin Assault

Kinnikuman II-Sei: All Out Chojin Assault, often referred to as Ultimate Muscle in international markets, serves as the direct sequel to Yudetamago's legendary 1980s wrestling manga. Created in the late 1990s, the series reintroduces the wrestling-based superhero universe to a new generation, focusing on Mantaro Kinniku, the son of the original protagonist. The narrative maintains the creator duo's signature blend of absurdity, high-stakes combat, and slapstick humor that defined the original series while transitioning into a more modern aesthetic.

The design of this series reflects the evolution of the mangaka duo's style, transitioning from the gritty, muscular figures of the Showa era to a more streamlined and varied character design palette to distinguish the new generation of Chojin. It was published within the pages of Weekly Shonen Jump and later V Jump, receiving a warm reception from long-time fans who appreciated the nostalgia and from a younger audience drawn to its dynamic, fast-paced action sequences.