Bioman must rescue two boys who possess an ancient treasure map that leads to Biobase, making them targeted by Gear.
Ryōsuke Sakamoto
as Shirō Gō/Red One
Naoto Tada
as Shingo Takasugi/Green Two
Akito Osuga
as Ryūta Nanbara/Blue Three
田中澄子
as Jun Yabuki/Yellow Four II
Michiko Makino
as Hikaru Katsuragi/Pink Five
幸田宗丸
as Doctor Man
飛鳥裕子
as Farrah
Yukari Ôshima
as Farrah-Cat
ストロング小林
as Monster
太田淑子
as Peebo
八代駿
as Messerjuu (voice)
山下啓介
as Psygorn (Voice)
