Badan Empire

• Great Leader JUDO (大首領 JUDO, Dai Shūryō JUDO) - The main antagonist, he is the same "Great Leader" who was the supreme leader of all of the evil organizations the nine previous Kamen Riders faced in the past. He leads the Badan Empire and is worshiped like a god by his followers. He possesses the ability to transform into the nine Kamen Riders and a golden version of ZX called Susanoo (スサノオ). He has his own language, which he can telepathically compel others to understand.
• Colonel Gamon / Ambassador Darkness - The nominal leader of the Badan Empire and twin brother of Ambassador Hell of Shocker. The two brothers were once known as General Damon and Colonel Gamon. They fought for the independence of a small Southeast Asian nation later christened "Gamon" after the supposedly deceased Colonel joined Badan. Far more powerful than his brother, Ambassador Darkness cannot be killed by physical means, and can regenerate wounds as grievous as being cut in half in a short period of time.
• Dr. Lars Bohmann - A renowned Norwegian geneticist and former scientist for Badan. In his younger days, he deliberately injured his two children in a plane crash and modified them with cybernetics. When his son, who became Mothroid, discovers this, he uses his poison to burn his father's skin from his body.
• The Last Battalion - A variety of cybernetic monstrosities kept by Badan on various floating islands. Only the Cyborg Elite can control them.
• Badan Vortex - A black hole-like construct used by Badan to suck up "sinners", sparing the Cyborg Elite. The only known way to destroy one is to attack the magic runes used to summon it; doing so appears to cause Ambassador Darkness pain.
• The Cyborg Elite - The self-styled "chosen ones" of the Badan Empire, they believe that they will inherit the Earth once JUDO cleanses it of "sinners". Each is a human given cyborg enhancements that allow them to change into a monster at will.
  • Needle / Yamaarashiroid - Leader of the Cyborg Elite. In human form, he is a mild-mannered, bespectacled man with blond hair. He possesses the ability to produce quills to attack as well as various other effects. After most of the Cyborg Elite fail, he goes after ZX himself, only to be defeated. Afterward, he quits Badan, believing Ambassador Darkness now wants his head for his failure.
  • Combatroids - The lowest-ranked of the Cyborg Elite, often used as grunt fighters. They are led by commanders in all black.
  • General Nguyen / Kumoroid - A celebrated military man of the Republic of Gamon, he seemingly leads the defense of the country against guerillas but in reality is playing both sides of the war; the guerillas are Combatroids in disguise. Killed by Kamen Rider 2, after which peace returns to Gamon.
  • Vega / Takaroid - A young Egyptian street punk who became a cyborg in exchange for Badan aid to his destitute family. He now rules a Badan cyborg factory in the form of a black pyramid. After he makes the largely innocent robot in charge of the factory cry, he is killed by V3.
  • Rosa / Bararoid - Rosa was once a young flamenco dancer who, with her husband, was chased off a cliff by superstitious villagers. She was made into a cyborg by a silver skull in the ocean and returned to haunt the village where she died—especially her father-in-law Greco. She possesses the ability to manifest a person's worst fear out of a pool of water; for the final battle with X, the water takes the form of King Dark. Both she and the silver skull are killed by X, though the skull is later found and reassembled by the Combatroids.
  • Salamander / Tokageroid - One of Needle's three chief lieutenants. In human form, he is a Peruvian assassin codenamed "Salamander". He is sent to kidnap a young cyborg, Victor, and lure him to Badan with promises of command over the Last Battalion. When that plan fails, he is turned into a mindless monster by Needle and killed by Amazon.
  • Eisuke Mikage / Tigeroid - Interpol detective and later henchman of the Badan Empire. He believes that there is no point in saving the world, and so only works to further himself. After taking a grievous wound protecting Ryo Murasame, the future ZX, both are modified by Badan. Mikage becomes Tigeroid, with the ability to produce a wide variety of artillery from his body.
  • Freyr "Poison" Bohmann / Dokugaroid - An effeminate male cyborg who is one of Needle's lieutenants. He is actually Dr. Lars Bohmann's son, who injured him in order to upgrade him with cybernetics. He was modified to secrete the most powerful poison in the world. He is killed by Skyrider after killing his father for using him. He is named for the Norse god Freyr.
  • Freya Bohmann - A good-natured female cyborg and sister to Freyr. She was injured in the same accident engineered by their father and modified to secrete the most powerful antidote in the world. Though she admits she is a monster, her monster form is never seen. Named for the Norse goddess Freya.
  • Asuma / Amenbaroid - A large cyborg and Needle's final lieutenant who attacks Super-1 when he discovers a mysterious crater made by Badan on the moon. In his effort to safeguard the secret, he massacres all but a small squadron of the crew of Super-1's moon base. He is killed by Super-1.
  • LaMoore / Chameleonroid - A Badan assassin sent after ZX when he defects. His human form is that of a grubby street person. Like the animal he is based on, he can climb walls and blend into backgrounds, and he has a long sticky tongue he uses as a weapon. After killing a homeless man befriended by ZX, he is seemingly killed by ZX himself. Although he survives, he is shattered both physically and mentally. After threatening Rumi, he is killed by ZX for good.
  • Jigokuroid, Kamakiroid, Kaniroid - The personal attendants of Ambassador Darkness. Though they have human forms, appearing as a motorcycle gang, they do not interact with humans and thus do not have human names. Antlionroid, the leader, is a stereotypical rebellious teenager. He is attracted to Mantisroid and sees Ambassador Darkness as a father figure to be revolted against. He can create sand pits and survive grievous wounds, but afterwards he takes on a naked and vulnerable form for a time. Mantisroid appears as a beautiful woman in her twenties and is attracted to Ambassador Darkness. She can release a chemical from her fingernails that immobilizes people. Crabroid appears as a little old man with a walking stick. He never speaks, apart from an insane cackling while in monster form. The three can combine with each other, and in this form they are dismembered by ZX after JUDO's influence is purged from their body. A backbone from each of them survives, but they are killed by Needle before they can regenerate.