This article is about a/an kaijin in Kamen Rider Black RX.

Zunojin is an elf-like monster who wielded a blade and could shoot a beam from his forehead crystal. Maribaron used Zunojin to attack Reiko in her dreams, taking control of the girl's subconscious in another plan to target Kohtaro Minami's weaknesses. With the aid of a dying Karu, RX uses the Crisis Marine's machine to enter Reiko's dream, giving Reiko back control over her dream before killing Zunojin with his Revolcane after a brief hesitation.