|This article is about a/an villain in Kamen Rider X.|
|Series:||Kamen Rider X|
|Affiliation:||Government of Darkness|
|First Appearance:||Farewell, X-Rider|
|Last Appearance:||Farewell, X-Rider|
|Number of Episode|
Full list of appearances
Dr. Noroi (呪博士 Noroi Hakase): After King Dark's defeat, Dr. Noroi is revealed to be the leader of the Government of Darkness and friend of Keitaro Jin in Jouhoku University as a teacher. Destroyed in King Dark's destruction after being stabbed by X's Ridol Whip along with Scorpion-Geronimo Jr..
- Though King Dark later appeared in Kamen Rider Decade: All Riders vs. Dai-Shocker and OOO, Den-O, All Riders: Let's Go Kamen Riders, his true nature as a giant robot controlled by Dr. Noroi is not seen.
- Unlike the Great Leader of (Gel-)Shocker and the Great Leader of Destron, Dr. Noroi, voiced by Fumio Wada rather than Goro Naya, would appear to be a different entity than the Great Leader. However, in Kamen Rider Stronger, as the Great Boss of Delza Army, the Great Leader claimed to be responsible for creating the Government of Darkness as well as Geddon (led by Ten-Faced Demon Gorgos) of Kamen Rider Amazon.
|Redizer - Perfecter - Ridol - Mercury Circuit - Cruiser|
|Tōbei Tachibana - Chiko - Mako - Kiriko Mizuki - Ryoko Mizuki - Keitaro Jin|
|Takeshi Hongo - Hayato Ichimonji - Shiro Kazami - Joji Yuki|
|Government of Darkness|
|King Dark - G.O.D. General Commander - Dr. Noroi|
|Apollo Geist - G.O.D. Warfare Agents|
|Neptune - Pannic - Hercules - Medusa - Cyclops - Bull Man Minotaur - Birdman Icarus - Mighty Atlas - Mach Achilles - Flaming Prometheus - Hydra - Chimera - Ulysses - Reaper Chronos - Cerberus - Alseides - Cateus|
|Ogle-Dagger - Salamander-Gong - Ghengis Khan-Condor - Toad-Goemon - Scorpion-Geronimo - Horned Beetle-Lupin - Franken Bat - Starfish-Hitler - Spider-Napoleon - Chameleon-Phantom - Leech Dracula - Lizard-Viking - Ant Capone - Centipede Youkihi - Tiger Nero - Scorpion-Geronimo Jr.|
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