Scorpion Man

Scorpion Man (さそり男) (a.k.a. Scorpion Human (さそり人間)) - A scorpion monster, originally known as Goro Hayase (an old friend of Takeshi Hongo) who uses his old identity to approach and attack Hongo. He controls an army of robotic scorpions that release corrosive acid. Has the ability to burrow underground and uses his pincer as a weapon. Destroyed by Kamen Rider #1's Rider Scissors.

He was later resurrected by Shocker as part of the Revived Kaijin Army before being destroyed by Tokageron's special bomb. Scorpion Man also made a brief return appearance in the monster army of the Kamen Rider vs. Shocker movie, but did not actually have an active participation there.

Super Hero Taisen
Scorpion Man was revived as part of Dai-Shocker in the Super Hero Taisen incident, led by Tsukasa Kadoya/Kamen Rider Decade, rivaling Captain Marvelous/Gokai Red and Dai-Zangyack. However, Rider Hunter Silva of Dai-Zangyack and Doktor G of Dai-Shocker overthrew their respective leaders and joined forces to destroy the Kamen Riders and Super Sentai. The two evil organizations united and faced off against the combined forces of the Sentai and Riders.