Also known as: 勇者王ガオガイガー
The eighth series of the Yuusha Series, debuting in 1997.
Yuusha Ou GaoGaiGar shares a universe with Betterman. The original 1997 series is succeeded by Yuusha Ou GaoGaiGar FINAL, which is followed by the climactic third part, Hakaiou: GaoGaiGar Vs. Betterman. The titular robot and its iterations have been referenced in broader pop culture, including Gunleon from Super Robot Wars Z1.