Great Valkyrie Empire

The mysterious Dai-Shocker (大ショッカー) organization is a conglomeration of villain organizations from the Rider multiverse who set into motion a plan to take over all dimensions due to someone providing the means to do so. Based on the World of Decade, their insignia is double-headed version of Shocker's eagle crest, but with the "DCD" written on it that hints at Decade's ties to them. In addition to Doctor Shinigami, there are many other members of Dai-Shocker that come from previous Kamen Rider Series. They send their agents out across the worlds to try to conquer the entire multiverse.

The idea of an organization composed of various villains from across the Kamen Rider Series previously was used with the Badan Empire in Birth of the 10th! Kamen Riders All Together!! and GranShocker in Kamen Rider SD.

Later incarnations
After Dai-Shocker was originally defeated, it continued to resurface in other forms.

Super Valkyrie Empire
The evil Super Shocker (スーパーショッカー) organization is formed from the last remnants of Dai-Shocker, with the destruction of the Nine Worlds and the destruction of Dai-Shocker. In addition to the high-ranking members Super Doctor Shinigami and Colonel Zol, other villains from the Kamen Rider Series make up the ranks of Super Shocker. They utilize the Super Crisis Fortress (スーパークライス要塞) as their base.

Dai-Shocker (Super Hero Taisen)
During the events of Kamen Rider × Super Sentai: Super Hero Taisen, Tsukasa Kadoya, with the help of Doktor G, reforms Dai-Shocker and becomes their Great Leader once more in order to take down the Super Sentai teams and the Dai-Zangyack group led by Captain Marvelous. This version of the organization used the original Shocker's emblem and used a rebuilt Crisis Fortress as its main base. Doktor G gathered its members, and it's also acknowledged that many of its members were killed before, but were brought back to life.

Although apparently victorious in eliminating the Super Sentai, Tsukasa was infiltrating them to stop their own plans, resulting in the survival of all Super Sentai and Riders. Meanwhile various members of the organization itself were actually working alongside Dai-Zangyack, resulting in Doktor G taking control of the organization to wipe out both the Super Sentai and the Kamen Riders together while allying themselves with Dai-Zangyack. This version of the organization was destroyed alongside its chief commanders by the combined forces of the Super Sentai and Kamen Rider army.

Leadership

 * Great Leader of Dai-Shocker (大ショッカー大首領): The nominal leader of the organisation who controlled it with an iron fist, Tsukasa Kadoya, only to disappear during his attempts to conquer other worlds. Upon Tsukasa's return to his world, he attempts to take the reins of the organization again, only to lose control of the organization and be betrayed by his sister Sayo and Nobuhiko Tsukikage, the AR Shadow Moon from the World of Decade. Some time later, in Super Hero Taisen, when the organization is reformed with the help of Doktor G, Tsukasa Kadoya yet again takes control of the organization and assumes the Great Leader title again.
 * Shadow Moon (シャドームーン): A butler serving Tsukasa's family who's actually the inheritor of the King Stone and planned to take Dai-Shocker and all worlds. After Tsukasa returns to Dai-Shocker, he's quick to oust him from the organization, taking place of leader, although calling himself Creation King.

High Commanders

 * Doctor Shinigami/Ikadevil (死神博士/イカデビル): Seemingly one of the commanders of the original Shocker returning to take an important role in Dai-Shocker, using the guise of Eijiro Hikari to secretly follow the amnesiac Great Leader of Dai-Shocker. He sided with Shadowmoon after his coup, even asking for cheers for Decade's apparent death. Like the original, he transformed into Ikadevil to fight, but was defeated by the Kamen Riders Decade, Diend, Faiz, Blade, Den-O and Kiva fighting together with four Final Form Rides at once. He did not die, just seemingly going back to Eijiro form and losing his Shinigami memories. In spite of his different appearance, his official profiles originally just gave him the story of the Shinigami from the original Kamen Rider series. However, in Movie War 2010, the true nature of the new Shinigami was revealed as something else. Eijiro returned as Super Doctor Shinigami, a Super Shocker commander, in Movie War 2010, with an appearance identical to his former Shinigami identity, aside from an extra ring with an "S" emblem. After he was hit inside the Super Crisis Fortress, a Gaia Memory carrying the name ShinigamiHakase fell from him and broke, revealing that Eijiro was actually controlled by a Gaia Memory based on Earth's memories of the original Doctor Shinigami.
 * Ambassador Hell/Garagaranda (地獄大使/ガラガランダ): The last commander of the original Shocker, who died fighting against Rider #1. Afterwards, the Great Leader destroyed the original Shocker. In spite of his original failure, in Kamen Rider Decade: All Riders vs. Dai-Shocker, Ambassador Hell appears alive, as a Dai-Shocker commander, sporting a black armor and Dai-Shocker belt, rather than the original silver suit. This Ambassador Hell, although having a different looking human form, had a Garagaranda form identical to the original's, complete with Shocker emblem on his belt. His official backstory is just the original Ambassador Hell's story, up to his first death at the hands of Rider #1. . Like most other Dai-Shocker members, he sided with Shadowmoon after his coup. This Hell Ambassador fought as Garagaranda against the Riders in All Riders vs. Dai-Shocker, but his tentacles were cut and he was stunned by Kamen Riders Black RX and Kabuto. Using that opportunity, Rider #1 and Rider #2 attacked. He's destroyed by Kamen Rider #1's and Kamen Rider #2's Rider Double Kick. Like in the original series, this Hell screamed to Dai-Shocker's perseverance before he died, exploding.
 * General Jark (ジャーク将軍): Member of the Crisis Empire and another one of Dai-Shocker's commanders. He sides with Shadowmoon after his coup, and pursues Diend, in an attempt to recover his Diend Driver, but he ends up having to face both Decade and Diend at once, only to be killed by Diend.
 * King Dark (キングダーク): Dai-Shocker's secret weapon and its strongest commander, the ultimate weapon built by Dai-Shocker for its world conquest. Unlike other members of the organization, he shows no ties to his original incarnation created and controlled by the Government of Darkness's leader, only having Dai-Shocker markings and emblems.

Other Important Members

 * High Priestess Bishium (大神官ビシュム): The identity Sayo Kadoya, Tsukasa's sister, takes due to Tsukikage's influence. She sides with Tsukikage after his coup, and uses the power of the Earth Stone to transform Kamen Rider Kuuga (Onodera) into the evil Rising Ultimate Form, controlling his actions like a marionette. However, she eventually repents her actions and ceases control over him, making peace with her brother.
 * Apollo Geist (アポロガイスト): The security chief of Dai-Shocker, who attempts to kill Tsukasa even before he reaches his own world and recovers his memories. In spite of that, claimed to act for the Great Leader to other Dai-Shocker members in the World of Amazon. He originates from the World of X-Rider, as member of its version of the Government of Darkness, but had been killed by X Rider in the past, needing the Perfecter to survive due to his flawed resurrection. He eventually loses his Perfecter to Diend, only to replace it with Fangire's souls in a last attempt to kill Tsukasa, but he's eventually defeated and destroyed by Kamen Rider Decade's and Diend's combined attack. He returns as a Dai-Shocker commander in Super Hero Taisen, having been reborn once again and receiving a new Perfecter, but he's destroyed once again by Kamen Rider Fourze.
 * Ten-Faced Demon Llumu Qhimil (十面鬼ユム・キミル) is the leader of Geddon and Dai-Shocker's designated ruler of the World of Amazon, developing the mindset that Kamen Riders are the enemies of the human race, rather than Geddon. He has the GaGa Armlet and seeks Amazon's GiGi Armlet to gain their full power and use the unlimited ancient Inca powers to complete his master plan of converting humans into monsters. He normally resembles a torso attached to a large boulder, but he can also assume a humanoid form adorned with the faces of the ten Heisei Kamen Riders from which he can access their powers and counter any of the ten Heisei Kamen Riders attacks. Though he gains the GiGi Armlet, he loses both it and the GaGa Armlet to the Kamen Riders with Decade Complete Form weakening him with Faiz Blaster Form before Amazon destroys him with the Super Dai Setsudan.
 * Yuki (ユウキ) is the Queen of the Fangires from the World of Kiva. Her true form is the Thorn Fangire (ソーンファンガイア), whose true name is Perishing at the Altar, Silence from a Deep Kiss (滅びゆく祭壇に、沈黙より深いキスを), a sea cucumber Fangire that belongs to the Aqua Class (アクアクラス) Tribe and able to execute her own version of the "Final Zanvat Slash". Though she supports Wataru, Yuki actually sides with Apollo Geist, marrying him to give him immortality so she can have a place in Dai-Shocker. When Tsukasa crashes the wedding, the Thorn Fangire fights him and is killed by Decade Complete Form with Ryuki Survive's power.
 * Schwarian (シュバリアン) is a Strange Demon Robot from the Crisis Empire, seeing himself as the ultimate machine in his branch. He originally turned down Apollo Geist's offer to join Dai-Shocker until he sees his power first hand. He is destroyed by Decade Complete Form with the aid of Agito Shining Form.
 * Joji Yuki (結城 丈二): Scientist who worked for Dai-Shocker in the creation of the Decade and Diend Drivers. However, after the work was finished, he was betrayed by the organization and had his arm taken by Dai-Shocker's Great Leader himself, Tsukasa Kadoya. After his betrayal, he starts a battle for vengeance against them, calling himself a Kamen Rider. During the events of All Riders vs Dai-Shocker, he returns for vengeance, but upon seeing that Tsukasa had become depressed and pathetic after being thrown away by the organization himself, decides that he isn't even worth killing. Instead, he reminds Tsukasa of how a Kamen Rider should fight, while facing many Dai-Shocker troops by himself with his arm cannon.

Dai-Shocker members in the World of Black RX
With Apollo Geist, several kaijin members of Dai-Shocker appear in the World of Black RX.
 * Scorpion Imagin (スコーピオンイマジン): An Imagin who accompanies Apollo Geist. Destroyed by Decade using Faiz Axel's power.
 * Seamoon Fangire (シームーンファンガイア): A Fangire who accompanies Apollo Geist. Destroyed by Decade using Agito's Rider Kick.
 * Mantis Fangire (マンティスファンガイア): A Fangire who accompanies Apollo Geist. Destroyed by Decade using Faiz Axel's power.
 * Sai Mutant (サイ怪人): A mutant of Gorgom. Summoned by Apollo Geist to convince Schwarian to join Dai-Shocker. He is summoned again to help protect Apollo Geist from Black RX, only to be quickly destroyed by Black's Rider Punch.
 * Ox Orphnoch (オックスオルフェノク): An Orphnoch. Destroyed by Diend.
 * Worm Orphnoch (ワームオルフェノク): An Orphnoch. Destroyed by Diend.
 * Frilled Lizard Orphnoch (フリルドリザードオルフェノク): An Orphnoch. Destroyed by Diend.
 * Brachypelma Worm Aurantium (ブラキペルマワーム・オーランタム): A tarantula Worm.
 * Brachypelma Worm Viridis (ブラキペルマワーム・ビリディス): A tarantula Worm.
 * Tarantes Worm Purpura (タランテスワーム・パープラ): A tarantula Worm.

Dai-Shocker members in the World of Amazon
Several kaijin members of Dai-Shocker appear in the World of Amazon.
 * Go-Jaraji-Da (ゴ･ジャラジ･ダ): A porcupine Gurongi. Destroyed when Amazon used his Jaguar Shock on him.
 * Propheta Cruentus (プロフェタ・クルエントゥス): A Mantis Lord, destroyed by Kuuga Titan Form's Calamity Titan attack.
 * Camponotus Worm Maxilla (カンポノタスワーム・マキシラ): A carpenter ant Worm destroyed by Decade's Dimension Kick.
 * Bakeneko (バケネコ): A cat Makamou. Destroyed when Amazon used his Big Slice on him.
 * Shocker Soldiers (ショッカー戦闘員)
 * Shocker Scientists (ショッカー科学者)
 * Vigilantes (自警団): A volunteer military police formed from the residents of the World of Amazon who act in flushing out potential threats.
 * Yobuko (ヨブコ): Formerly the Vigilantes' leader who gets transformed into a Makamou as a reward by Llumu Qhimil using the powers of both the GiGi and GaGa armlets on him.

Dai-Shocker members in the World of Decade

 * Kaijin from the Shōwa Kamen Rider Series
 * Shiomaneking (シオマネキング): A monstrous fiddler crab-like member of Shocker.
 * Ganikomoru (ガニコウモル): A member of Geldam and Gel-Shocker that is the combination of a crab and a bat. Although the original was an unique monster, Dai-Shocker has multiple Ganikomoru.
 * Doras (ドラス): A grotesque Kamen Rider-like form that is the aspect of the Neo Organism.
 * Cobra Man Garai (コブラ男ガライ): An armored cobra-like kaijin who is the child of the Fog Mother.


 * Gurongi from Kamen Rider Kuuga
 * Zu-Mebio-Da (ズ･メビオ･ダ) A leopard Gurongi.
 * Me-Bajisu-Ba (メ･バヂス･バ): A wasp Gurongi.
 * Me-Ginoga-De (メ･ギノガ･デ): A mushroom Gurongi.
 * Go-Gadoru-Ba (ゴ･ガドル･バ): A rhinoceros beetle Gurongi.


 * Lords from Kamen Rider Agito
 * Leiurus Acutia (レイウルス・アクティア): A scorpion Lord.
 * Formica Pedes (フォルミカ・ペデス): A black carpenter ant Lord.
 * Formica Regia (フォルミカ・レギア): A queen ant Lord.


 * Mirror Monsters from Kamen Rider Ryuki
 * Sheerghost (シアゴースト): A dragonfly larva Mirror Monster.
 * Raydragoon (レイドラグーン): A dragonfly Mirror Monster.
 * Psycorogue (サイコローグ): A robotic cricket Mirror Monster.


 * Orphnoch from Kamen Rider 555
 * Butterfly Orphnoch (バタフライオルフェノク): A butterfly Orphnoch.
 * Giraffe Orphnoch (ジラフオルフェノク): A giraffe Orphnoch.
 * Longhorn Orphnoch (ロングホーンオルフェノク): A longhorn beetle Orphnoch.
 * Slug Orphnoch (スラッグオルフェノク): A slug Orphnoch.
 * Wild Boar Orphnoch (ワイルドボアオルフェノク): A wild boar Orphnoch.
 * Pelican Orphnoch (ペリカンオルフェノク): A pelican Orphnoch.
 * Stinkbug Orphnoch (スティンクバグオルフェノク): A stinkbug Orphnoch.
 * Arch Orphnoch (アークオルフェノク): A grasshopper Orphnoch.


 * Undead from Kamen Rider Blade
 * Elephant Undead (エレファントアンデッド): The Jack of Clubs Undead.
 * Giraffa Undead (ギラファアンデッド): The King of Diamonds Undead.
 * Darkroach (ダークローチ): A cockroach Undead.


 * Makamou from Kamen Rider Hibiki
 * Kappa (カッパ): A snapping turtle/frog Makamou.
 * Bakeneko (バケネコ): A cat Makamou.
 * Hitotsumi (ヒトツミ): A Futakuchi-onna Makamou.


 * Worms from Kamen Rider Kabuto
 * Coleoptera Worm Aeneus (コレオプテラワーム・アエネウス): A scarab Worm.
 * Coleoptera Worm Croceus (コレオプテラワーム・クロセウス): A scarab Worm.
 * Coleoptera Worm Argentum (コレオプテラワーム・アージェンタム): A scarab Worm.
 * Geophilid Worm (ジオフィリドワーム): A centipede kaijin.
 * Subst Worm (サブストワーム): A crayfish Worm.
 * Cassis Worm Gladius (カッシスワーム・グラディウス): A horseshoe crab Worm.


 * Imagin from Kamen Rider Den-O
 * Albinoleo Imagin (アルビノレオイマジン): A white lion Imagin.
 * Mole Imagin (モールイマジン（アックスハンド）): A mole Imagin.


 * Fangire from Kamen Rider Kiva
 * Rat Fangire (ラットファンガイア): A rat Fangire.
 * Sungazer Fangire (サンゲイザーファンガイア): A giant girdled lizard Fangire.
 * Bat Fangire (バットファンガイア): A bat Fangire.
 * Other Kaijin from Kamen Rider Decade
 * Taurus Ballista (タウルス・バリスタ): The Buffalo Lord who appeared previously in Kamen Rider Decade.

Dai-Shocker members in the World of the Rider War
Several kaijin members of Dai-Shocker appear in the World of the Rider War.


 * Fangires
 * Wataru also leads a group of Fangires, as their king, in the World of the Rider War. However, they are actually on Dai-Shocker's side.


 * Shark Fangire (シャークファンガイア): Destroyed by Diend.
 * Silkmoth Fangire (シルクモスファンガイア): Destroyed by Diend.
 * Horsefly Fangire (ホースフライファンガイア): Destroyed by Diend.
 * Warthog Fangire (ウォートホッグファンガイア): Aiding in the fight against the World of Blade, Yuki sics him on Tsukasa when he refuses to aid their side. The Fangire is easily destroyed by Decade in seconds as a result.


 * Undead
 * The Undead originally from the World of Blade fight alongside the World of Blade's Kamen Riders, fighting against the Fangires in the World of the Rider War. However, they are actually on Dai-Shocker's side.


 * Deer Undead (ディアーアンデッド): The Six of Spades Undead, destroyed by Diend.
 * Scarab Undead (スカラベアンデッド): The Ten of Spades Undead, destroyed by Diend.
 * Lizard Undead (リザードアンデッド): The Two of Spades Undead, destroyed by Diend.


 * Nine Worlds' Kaijin
 * To fight Decade, Diend, Kuuga, Kiva, and Hibiki, Super Apollo Geist recreates the following kaijin from the Nine Worlds.


 * Phylloxera Worm (フィロキセラワーム): Created by combining Worms. The Phylloxera Worm is destroyed by Diend's Blue Strike.
 * Tiger Orphnoch (タイガーオルフェノク): Created by combining Orphnoch. The Tiger Orphnoch is destroyed by Decade Complete Form's Enhanced Dimension Kick.
 * Paradoxa Undead (パラドキサアンデッド): Created by combining Undead. The Paradoxa Undead is destroyed by Kiva.
 * Beetle Fangire (ビートルファンガイア): Created by combining Fangires. The Beetle Fangire is destroyed by Kuuga's Mighty Kick.
 * Buffalo Lord Taurus Ballista (バッファローロード タウルス・バリスタ): Created by combining Lords. The Buffalo Lord is destroyed by Hibiki.
 * Alligator Imagin (アリゲーターイマジン): Created by combining Imagin. The Alligator Imagin is destroyed by Decade Complete Form's Enhanced Dimension Kick.

Soldiers

 * Dai-Shocker Combatmen (大ショッカー戦闘員) - Black uniformed grunts with skeleton markings on their torsos. Their trademark is a high pitched scream. They're seemingly identical to the original Shocker Combatmen, although also can propel and launch themselves as suicide missiles against their enemies.
 * Dai-Shocker Scientists - White masked researchers with black skeleton markings, wearing white lab coats, shirts and pants, alongside with white gloves covering their hands.
 * Destron Combatmen (デストロン戦闘員) - Black uniformed grunts with white scorpion markings on their torsos. They're similar to the Shocker Combatmen, but significantly stronger to the point of easily defeating any normal human in combat.

Leadership (Super Hero Taisen)

 * Great Leader of Dai-Shocker (大ショッカー大首領)
 * Doktor G (ドクトルG) / Kani Laser (カニレーザー) - This version of Doktor G was actually Narutaki. Originally, the Vice-Leader of the organization, he plots to kill the Great Leader Decade and takes total control when Tsukasa's true goal is revealed, both Dai-Shocker and Dai-Zangygak where in it together to use Marvelous and Tsukasa as pawns to have both Sentai teams and Riders kill each other in order for them to render both worlds helpless and easy for takeover.

High Commanders (Super Hero Taisen)

 * Apollo Geist (アポロガイスト)
 * General Shadow (ジェネラルシャドウ)
 * Shadow Moon (シャドームーン)
 * General Jark (ジャーク将軍)
 * Doras (ドラス)
 * N-Daguva-Zeba (ン･ダグバ･ゼバ)
 * El of the Ground (地のエル)
 * Nurikabe's Douji (ヌリカベのどうじ)
 * Arch Orphnoch (アークオルフェノク)
 * Joker (ジョーカー)
 * Gryllus Worm (グリラスワーム)
 * Bat Fangire (バットファンガイア)
 * Alligator Imagin (アリゲーターイマジン)
 * Ten-Faced Demon Llumu Qhimil (十面鬼ユム・キミル)
 * Weather Dopant (ウェザー・ドーパント)
 * Mezool (メズール)

All of them, aside from N-Daguva-Zeba, who simply doesn't appear in the final battle, are shown siding with Doktor G once he turns against Tsukasa.

Kaijin (Super Hero Taisen)

 * Shocker Kaijin
 * Scorpion Man (さそり男)
 * KomaThunder (コマサンダ)
 * Ghoster (ゴースター)
 * Isoginjaguar (イソギンジャガ)


 * Badan Kaijin
 * Tiger-Roid (タイガーロイド)


 * Grongi
 * Go-Jaaza-Giゴ･ジャーザ･ギ (Go Jāza Gi)
 * Go-Gadoru-Ba (ゴ･ガドル･バ)
 * Go-Baberu-Da (ゴ･バベル･ダ)
 * Me-Garima-Ba (メ･ガリマ･バ)


 * Lords
 * Pantheras Luteusパンテラス・ルテウス (Panterasu Ruteusu)
 * Stellio Dexteraステリオ・デクストラ (Suterio Dekusutora)
 * Taurus Ballista (タウルス・バリスタ)


 * Mirror Monsters
 * Brobajell (ブロバジェル)
 * GuldMirage (ガルドミラージュ)


 * Orphnoch
 * Armadillo Orphnoch (アルマジロオルフェノク)
 * Rhinoceros Beetle Orphnoch (ライノセラスビートルオルフェノ)


 * Undead
 * Shell Undead (シェルアンデッド)
 * Tortoise Undead (トタスーアンデッド)


 * Makamou
 * Kasha (カシャ)


 * Worm
 * Musca Worm (ミュスカワーム)


 * Imagin
 * Gecko Imagin (ゲッコーイマジン)
 * Bat Imagin (バットイマジン)
 * Mole Imagin (モールイマジン)


 * Fangire
 * Rat Fangire (ラットファンガイア)
 * Warthog Fangire (ウォートホッグファンガイア)


 * Legendorga
 * Medusa Legendorga (マドゥーサレジェンドルガ)


 * Dopant
 * Cockroach Dopant (コックローチ・ドーパント)
 * Spider Dopant (スパイダードパント) - Only appears in the 1:30 trailer, not in the movie itself.


 * Yummy
 * Uni-Armadillo Yummy (ウニアルマジロヤミー)
 * Kuwagata Yummy (クワガタヤミー)

Soldiers (Super Hero Taisen)

 * Shocker Combatmen (ショッカー戦闘員)
 * Destron Combatmen (デストロン戦闘員)
 * Dogma Fighters (ドグマファイター)
 * Chaps (チャップ)
 * Makamou Ninja Group (魔化魍忍群ヤミ)

Novel
Dai-Shocker does not exist in the novel reimagination of the Kamen Rider Decade TV series, Kamen Rider Decade: The World of Tsukasa Kadoya ~The Garden Inside the Lens~. There is no union of villains, the only villains in the novel are those of the Nine Worlds (such as Gurongi in the World of Kuuga and Worms in the World of Kabuto), Narutaki is the final villain.