Shadow Moon operates within the villainous organization Grand Shocker, serving under the Great Leader alongside enemies of the Kamen Riders. He positions himself as the eternal rival to Kamen Rider Black RX, though their confrontations favor comedic antagonism over serious battles. His signature weapon is the red-bladed Satan Saber. Despite striving for menace, Shadow Moon's efforts often fail, undermining his villainous image and prompting Black RX to mockingly call him "Sunshine Moon." Their adversarial history stretches back to kindergarten, establishing a long-standing, one-sided rivalry. He employs an unspecified motorcycle, possibly a modified Battle Hopper. In the video game *Kamen Rider SD: Sortie!! Rider Machines*, he appears as the final boss. Within the *Kamen Rider SD* OVA *Strange!? Kumo Otoko*, he participates in Grand Shocker's plots, including the kidnapping of Michiru to eliminate the Kamen Riders.