Kikkaijin Denkiei

Kikkaijin Denkiei (奇械人電気エイ): A stingray monster. He is capable of stealing Stronger's electric powers, storing charges from any physical attack he performs. He can then unleash the energy through whip flails from his arms. Each attack dispends one charge indicated by the red lights on his chest. He was destroyed by Stronger's Stronger Electro Kick after his electrical charges are exhausted.

Denkei was part of group of Revived Kikkaijin born from a single Satan Bug. Posing as scrapped Kikkaijin in the Black Satan base, they attacked Stronger, Tackle and Tachibana. After a brief skirmish against Stronger, the revived Kikkaijin were reverted back to the Satan Bug.