Kurageron (クラゲロン Kurageron?, 20-21): A jellyfish monster hailing from Kowloon, Hong Kong. Participated in a two-way plan with Sai Dump to annihilate Japan. His part was to mass breed his poisonous jellyfishes and unleash them into the country's water supply. In battle, his pet jellyfishes vaporize targets they attach to and can also transform into Ari Commandos. He can extend his right tentacle arm into a flail/whip and is also invulnerable to the Sky Kick. His soft body cushions the power of the attack and temporarily deflates him. Ari Commandos under his control also wield tentacle like lassoes. Destroyed by Kamen Rider Stronger's Super Electron Drill Kick.
He was later resurrected as part of Kaijin the Second Generation Corps (怪人二世部隊 Kaijin Nisei Butai?, 27-28). They wore yellow scarves and were destroyed by the 7 Riders. He was once again evived as part of the Dogma Revenge Corps (ドグマ復讐兵団 Doguma Fukushū Heidan?, movie) and destroyed by Skyrider.