|This article is about a/an monster in Kamen Rider, the original series.|
Mushroomorg (キノコモルグ Kinokomorugu, 24, 25, Rider vs Shocker & Rider vs Ambassador Hell) – A mushroom monster. He is able to spit poisonous spores that paralyze anyone who touches it and is equipped with a knife. His emblem, worn by the Combatants of the base that modified him, is a two-headed mushroom. A condemned criminal was taken from prison by Shocker Combatants. After hearing the organization's goals, he thought they were interesting and decided to join them. Bathed in poisonous mushroom extract for one week, he became Mushroomorg. Mushroomorg went on a parade alongside several Shocker Combatants, quickly capturing children curious enough to follow them. He defeated and captured Rider 2 with his special ability, but the Kamen Rider was saved by Taki. They fought again later, but he was destroyed by Kamen Rider 2's Rider Kick. The explosion created by his death destroyed his own Shocker base. Mushroomorg returned in the movie Kamen Rider vs. Shocker, fighting against Kamen Rider 2 again to capture a researcher's daughter, but he was destroyed easily by Kamen Rider 2's Rider Kick. Rebuilt once again by Shocker, his last appearance was in the movie Kamen Rider vs. Ambassador Hell. He helped in delaying Kamen Rider 1 from reaching a Shocker base and was left behind, alive, by Kamen Rider 1 afterward.