Kamen Rider Wars: Mobian Smash

Kamen Rider Nio (仮面ライダー仁王) is Japanese tokusatsu drama in the Kamen Rider series by Toei and Topaz Central. Considered the first season of the "Topaz era", it was produced for a full run after the conclusion of Kamen Rider Build. It began airing on BS Asahi and Tokyo MX alongside the current Kamen Rider series in chronology, though it would later be streamed on the Japanese version of Amazon Prime.

The series celebrates the 20th anniversary of the Super Smash Bros. series, the end of the Heisei era and just a general celbration of video games. The tagline of the show is "Defend the worlds and realms!" (世界と世界を守ろう！). Much like Kamen Rider Decade and Kamen Rider Build, it commemorates all of the Heisei-era Kamen Riders to date.