New Worlds

The characters of Kamen Rider Decade exist amongst various different iterations of reality within the series referred to as an A.R. World (Another Rider's World). The New Worlds (新たな世界, Aratana Sekai?) are the A.R. Worlds that are not based on a previous entry of the Kamen Rider Series from the Heisei period.

World of Negatives
The World of Negatives (ネガの世界, Nega no Sekai?) is a parallel world created in the image of the one Natsumi and Tsukasa come from, but is actually home to monsters who assume human form and serve Dark Riders (ダークライダー, Dāku Raidā?) who hunt down any real humans that are still alive. The backdrop used to enter this world depicts the destruction of the first world caused by the monsters' conflict among themselves, the scene itself matching up with the mother and child running from the flames in the first episode, just before the event was frozen by Wataru Kurenai.

Otoya Kurenai
Otoya Kurenai (紅 音也, Kurenai Otoya?) is a young man who leads the Dark Riders, using his connection to Kivat-bat the 2nd to become Kamen Rider Dark Kiva (仮面ライダーダークキバ, Kamen Raidā Dāku Kiba?). Revealing himself to Tsukasa while thanking him for saving their world, Otoya has an agenda to have Tsukasa become the king of the World of Negatives, testing him personally to confirm it.[3][4] But his plan fails as Tsukasa refuses and defeats his allies, leaving Otoya the only surviving Dark Rider.[5][6]

Kouhei Takeda (武田 航平, Takeda Kōhei?) reprises his role as Otoya Kurenai from Kamen Rider Kiva.

Natsumi
The World of Negatives' Natsumi (ネガの世界の夏海, Nega no Sekai no Natsumi?) is the World of Negatives counterpart of the real Natsumi Hikari and one of the few remaining humans in the World of Negatives. She confronts her counterpart in an attempt to warn her of Otoya's scheme, only to be forced to dig up the K-Touch she had hidden. She eventually gives her goodbyes to Natsumi while entrusting the K-Touch to Tsukasa, remaining in her world out of hope for the future.[5][6]

Kanna Mori portrays the World of Negatives's Natsumi alongside her primary role as Natsumi Hikari.

Ryuga
Kamen Rider Ryuga (仮面ライダーリュウガ, Kamen Raidā Ryūga?) is a Dark Rider who murdered and assumed the guise of the World of Negatives counterpart of Hirohiko Sato (佐藤 博彦, Satō Hirohiko?), Natsumi's TG Club high school classmate. He is destroyed by Decade Complete Form with aid from Ryuki Survive.[3][4][5][6]

Ryuga and Hirohiko Sato are portrayed by Takatsugu Iwama (岩間 天嗣, Iwama Takatsugu?).

Orga
Kamen Rider Orga (仮面ライダーオーガ, Kamen Raidā Ōga?) is a Dark Rider who murdered and assumed the guise of the World of Negatives counterpart of Kenji Sakata (坂田 健児, Sakata Kenji?), Natsumi's TG Club high school classmate. He is destroyed by Decade Complete Form with aid from Faiz Blaster Form.[3][4][5][6]

Orga and Kenji Sakata are portrayed by Keisuke Sakamoto (坂本 恵介, Sakamoto Keisuke?).

Dark Kabuto
Kamen Rider Dark Kabuto (仮面ライダーダークカブト, Kamen Raidā Dāku Kabuto?) is a Dark Rider who murdered and assumed the guise of the World of Negatives counterpart of Kazuyoshi Aoyagi (青柳 和良, Aoyagi Kazuyoshi?), Natsumi's TG Club high school classmate. He is destroyed by Decade Complete Form with aid from Kabuto Hyper Form.[3][4][5][6]

Dark Kabuto and Kazuyoshi Aoyagi are portrayed by Yohta Mori (森 陽太, Mori Yōta?).

Alternative
Pseudo-Rider Alternative (疑似ライダーオルタナティブ, Giji Raidā Orutanatibu?) is a Dark Rider who assumed the guise of the World of Negatives counterpart of Tanaka (田中, Tanaka?), Natsumi's high school teacher. Though ordered by Otoya to keep an eye on Natsumi rather than kill her, he intentionally decides to attack Natsumi, resulting in Dark Kiva beating him merciless. Alternative is then later destroyed by Diend.[3][4][5][6] Although referred to as Alternative, the suit is actually that of Alternative Zero (オルタナティブ・ゼロ, Orutanatibu Zero?).

Alternative and Tanaka are portrayed by Masayasu Kitayama (北山 雅康, Kitayama Masayasu?).

Chinatsu
Chinatsu (千夏, Chinatsu?) is Natsumi's high school friend who was the president of the student council. Her World of Negatives counterpart died giving her Natsumi the K-Touch which she stole from the Dark Riders.

Chinatsu is portrayed by Juri Ihata (井端 珠里, Ihata Juri?).

Raydragoons
Raydragoons (レイドラグーン, Reidoragūn?, 20-21) are Dragonfly Mirror Monsters that live in the World of Negatives as Otoya's minions, taking the guise of normal humans. They are destroyed by Diend.

World of Diend
The World of Diend (ディエンドの世界, Diendo no Sekai?) is the world where Daiki comes from, similar to the World of Blade due to the presence of Undead known as Roaches (ローチ, Rōchi?). But as the world is dominated by them and their leader Fourteen, the human populace is mostly brainwashed into a state of euphoria and conditioned to see Kamen Riders as disruptors of the peace. The backdrop used to enter this world depicts a wanted poster with Diend's symbol on it in the foreground and a cityscape in the background. Within this A.R. World, Tsukasa assumes the role of a traveling salesman before being labeled a criminal.

Junichi Kaitoh
Junichi Kaitoh (海東 純一, Kaitō Jun'ichi?) is Daiki's older brother within his home world. Like Daiki, Junichi is also a Kamen Rider, Kamen Rider Glaive (仮面ライダーグレイブ, Kamen Raidā Gureibu?), setting up the operation to overthrow Fourteen. However, Junichi was actually a double agent who worked to flush out the last two Kamen Riders of their world until Daiki unknowingly captured him, and as a result, played the role as Fourteen's puppet right hand in charge of the area management committee. However, once Fourteen is destroyed, Junichi reveals the truth with intent to be the next Fourteen. In spite of not being able to kill Daiki, with Tsukasa affirming he still has his free will, Junichi considers his brother dead to him and leaves.[7][8][9][10]

Yuki Kuroda (黒田 勇樹, Kuroda Yūki?) portrays Junichi Kaitoh. He previously portrayed Junichi Shimura (志村 純一, Shimura Jun'ichi?) in Kamen Rider Blade: Missing Ace.

Haruka Miwa
Haruka Miwa (三輪 春香, Miwa Haruka?) is a young woman who resists Fourteen as Kamen Rider Larc (仮面ライダーラルク, Kamen Raidā Raruku?). She took part in the operation to overthrow Fourteen and ended up escaping with Shin when the operation was a failure. Since then, she has been on the run from Fourteen's minions. She helps fill Tsukasa in on what is currently happening in her world.[7][8]

Yoko Mitsuya (三津谷 葉子, Mitsuya Yōko?) portrays Haruka Miwa. She previously portrayed Natsumi Miwa (三輪 夏美, Miwa Natsumi?) in Kamen Rider Blade: Missing Ace.

Shin Magaki
Shin Magaki (禍木 慎, Magaki Shin?) is a hot-blooded young man who resists Fourteen as Kamen Rider Lance (仮面ライダーランス, Kamen Raidā Ransu?). After the operation to overthrow Fourteen failed due to Daiki's efforts, he escaped with Haruka. He holds a grudge against Daiki for selling out his older brother.[7][8]

Takao Sugiura (杉浦 太雄, Sugiura Takao?) reprises his role as Shin Magaki from Kamen Rider Blade: Missing Ace.

Jashin 14
Jashin 14 (邪神１４, Jashin Fōtīn?) is leader of the Roaches and ruler of this world, assuming the human-like form of Fourteen (フォーティーン, Fōtīn?) for his "ideal peace", turning humans into mindless slaves. He is destroyed by Decade in Complete Form with aid from Armed Hibiki.[7][8][9][10]

Fourteen is portrayed by Takashi Ito (伊藤 高史, Itō Takashi?).

Bossroach
Bossroach (ボスローチ, Bosurōchi?) is one of the Roach enforcers who watch over the human race, whom he sees to be inferior. Bossroach resembles the Caucasus Undead. Bossroach is then destroyed by Decade Complete Form using the Emperor Final KamenRide.[7][8]

Darkroaches
Darkroaches (ダークローチ, Dākurōchi?) are Category Unknown Undead who are minions of Fourteen, going after any one who breaks the law. When their master is destroyed, the Darkroaches fade away into nothingness.

World of Shinkenger
The World of Samurai Sentai Shinkenger (侍戦隊シンケンジャーの世界, Samurai Sentai Shinkenjā no Sekai?) is the reality in which the Super Sentai Series Samurai Sentai Shinkenger takes place. The backdrop used to enter this world resembles the ending credits sequence of Shinkenger, featuring two kuroko opening up a curtain to reveal artistic representations of the five main Origami. Because it is initially a world without Kamen Riders, the World of Shinkenger is not an A.R. World until Chinomanako obtains the Diendriver and transforms, becoming a distortion that threatens the world itself.[11][12][13][14] The storyline takes place after Shinkenger Act (episodes) 20 and during Act 21, with the episodes airing on July 12 and July 19, 2009.[15][16] Within this world, Tsukasa finds himself as one of the kuroko of the Shiba Household, discarding the guise when the distortion begins.

The Shinkengers
The Shinkengers (シンケンジャー, Shinkenjā?) are six young men and women who use a special kanji-based power called Modikara (モヂカラ, Mojikara?) to combat the evil Gedoushu as superpowered samurai. They consist of the Shiba Household lord Shinken Red, Takeru Shiba, and his vassals: Shinken Blue, Ryunosuke Ikenami; Shinken Pink, Mako Shiraishi; Shinken Green, Chiaki Tani; Shinken Yellow, Kotoha Hanaori; and Shinken Gold, Genta Umemori. They are accompanied by the Shiba Household's retainer Hikoma Kusakabe and many kuroko.

The Gedoushu
The Gedoushu (外道衆, Gedōshū?) are malevolent spirits that dwell in the Sanzu River. They enter the mortal world through gaps to inflict terror on the humans to allow the river to flood over both worlds. Their leading members live aboard the Rokumon Junk (六門船, Rokumonsen?) and consist of Doukoku Chimatsuri, Dayu Usukawa and Bony Shitari. Under their control are the Ayakashi (アヤカシ?) who enter the mortal world, assisted by the Nanashi Company.

Chinomanako
Chinomanako (チノマナコ?) is an Ayakashi that steals the Diendriver and is able to become Chinomanako Diend Form (チノマナコ・ディエンド変身態, Chinomanako Diendo Henshintai?), the World of Shinkengers' first native Kamen Rider. In addition to KamenRide Cards, Chinomanako has KaijinRide Cards, allowing him to summon monsters from the other Kamen Rider Series. As with other Ayakashi being the basis of monsters from Japanese mythology, Chinomanako is the basis of the Mokumokuren (目目連?).[11][12]

Chinomanako is voiced by Ryūzaburō Ōtomo (大友 龍三郎, Ōtomo Ryūzaburō?).

World of Black RX
The World of Kamen Rider Black RX (仮面ライダーブラックRXの世界, Kamen Raidā Burakku Āru Ekkusu no Sekai?) is the version of reality where Kamen Rider BLACK RX takes place. The backdrop used to arrive in this world features the Crisis Empire's battleship in the background. Within this A.R. World, Tsukasa originally wore a set of clothes that have him mistaken for Joe the Haze (霞のジョー, Kasumi no Jō?) by Kotaro and the Crisis Empire.[17][18]

Kotaro Minami (Black RX)
Kotaro Minami (南 光太郎, Minami Kōtarō?) is a man who fights the Crisis Empire as Kamen Rider Black RX (仮面ライダーブラックRX, Kamen Raidā Burakku Āru Ekkusu?), able to become either Robo Rider (ロボライダー, Robo Raidā?), or Bio Rider (バイオライダー, Baio Raidā?). However, with Dai-Shocker appearing in his world, he finds himself outmatched by the new monsters while searching for his friend Joe the Haze.[17][18] Natsumi convinces him that Tsukasa is not the Destroyer of Worlds that he heard about. Though he eventually learns of Joe's fate, Kotaro is not saddened as his friend would be with him in spirit.

Tetsuo Kurata (倉田 てつを, Kurata Tetsuo?) reprises his role as Kotaro Minami from BLACK RX.

Schwarian
Schwarian (シュバリアン, Shubarian?) 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.[17][18] He is destroyed by Decade Complete Form with the aid of Agito Shining Form.

Schwarian is voiced by Tetsu Inada (稲田 徹, Inada Tetsu?).

Chaps
Chaps (チャップ, Chappu?) are the Crisis Empire's foot soldiers.

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, Sukōpion Imajin?, 26-27): 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, Sīmūn Fangaia?, 26): 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, Mantisu Fangaia?, 26-27): A Fangire who accompanies Apollo Geist. Destroyed by Decade using Faiz Axel's power. Rhinoceros Mutant (サイ怪人, Sai Kaijin?, 26-27): A mutant of Gorgom. Summoned by Apollo Geist to convince Schwarian to join Dai-Shocker. Destroyed by Black's Rider Punch. Ox Orphnoch (オックスオルフェノク, Okkusu Orufenoku?, 27): An Orphnoch. Destroyed by Diend. Worm Orphnoch (ワームオルフェノク, Wāmu Orufenoku?, 27): An Orphnoch. Destroyed by Diend. Frilled Lizard Orphnoch (フリルドリザードオルフェノク, Furirudo Rizādo Orufenoku?, 27): An Orphnoch. Destroyed by Diend. Brachypelma Worm Aurantium (ブラキペルマワーム・オーランタム, Burakiperuma Wāmu Ōrantamu?, 27): A tarantula Worm. Brachypelma Worm Viridis (ブラキペルマワーム・ビリディス, Burakiperuma Wāmu Biridisu?, 27): A tarantula Worm. Tarantes Worm Purpura (タランテスワーム・パープラ, Tarantesu Wāmu Pāpura?, 27): A tarantula Worm.

World of Black
The World of Kamen Rider Black (仮面ライダーブラックの世界, Kamen Raidā Burakku no Sekai?) is the version of reality where Kamen Rider BLACK takes place, a parallel world to the World of Black RX.[19][20] Apollo Geist arrives in this world prior to its RX counterpart, recruiting the cult Gorgom as a result.

Kotaro Minami (Black)
Main article: Kamen Rider BLACK (character) Kotaro Minami (南 光太郎, Minami Kōtarō?) fights the Gorgom as Kamen Rider Black (仮面ライダーブラック, Kamen Raidā Burakku?). Unlike his counterpart in the World of Black RX, he is warned of Decade and initially sees him as an enemy. It is not until the interference of Dai-Shocker does he finally consider Decade as an ally, revealing that he has been fighting Dai-Shocker with the aid of Joe the Haze.

Tetsuo Kurata reprises his role as Kotaro Minami in the character's World of Black incarnation.

World of Amazon
The World of Kamen Rider Amazon (仮面ライダーアマゾンの世界, Kamen Raidā Amazon no Sekai?) is the version of reality where Kamen Rider Amazon takes place. By the time Decade arrives, he finds the world is under Dai-Shocker's control as they eliminate any resistance. As a result, the people do not trust each other, as they cannot tell who is and who is not aligned with Dai-Shocker. The backdrop used to arrive in this world depicts the Amazon Rainforest with Amazon in the middle of it. Within this A.R. World, Tsukasa wears the attire of a baseball player.[21][22][23][24]

Daisuke Yamamoto
Daisuke Yamamoto (山本 ダイスケ, Yamamoto Daisuke?), known only as "Amazon" (アマゾン?), is a man from the Amazon Rainforest who traveled across the world to find a place that he could call home, eventually arriving in Japan where he fights Geddon as Kamen Rider Amazon (仮面ライダーアマゾン, Kamen Raidā Amazon?).[21][22] Though disillusioned after Masahiko used him to get the GiGi Armlet, Amazon regains his trust in humanity when the boy returns the armlet, finding his place by the Okamura. His full name is not given in the television series, but is mentioned in TV-Kun magazine.

Daisuke is portrayed by Enrique Sakamoto (坂本 エンリケ, Sakamoto Enrike?), a Japanese Peruvian from Trujillo.

Masahiko Okamura
Masahiko Okamura (岡村 マサヒコ, Okamura Masahiko?) is a 4th grade student whose father died a year prior to Dai-Shocker's arrival, escaping the pain of his father's death by joining the Shocker School that has been established in his world. Because he excels in exposing rebels, Llumu Qhimil uses the boy to find Amazon's hideout. But during the fight, Dai-Shocker's forces turn on him, leading him to take GiGi Armlet from Amazon to get back in Dai-Shocker's good graces.[21][22] When he is turned in to become the first of Llumu Qhimil's monster conversion project, he realizes that the truth and helps in regaining Amazon's GiGi Armlet and faith in people.[23][24]

Masahiko Okamura is portrayed by Akashi Takei (武井 証, Takei Akashi?).

Ritsuko Okamura
Ritsuko Okamura (岡村 リツコ, Okamura Ritsuko?) is Masahiko's older sister and is a school nurse at the Shocker School.[21][22] When she discovers that the Hikari Studio group has infiltrated the school, she sends Shocker Soldiers after them, until Masahiko proves to her that the Kamen Riders are not evil.[23][24]

Ritsuko Okamura is portrayed by Yuki Terada (寺田 有希, Terada Yuki?).

Llumu Qhimil
Ten-Faced Demon Llumu Qhimil (十面鬼ユム・キミル, Jūmenki Yumu Kimiru?) is the leader of Geddon and Dai-Shocker's designated ruler of this world, 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 Amazon destroying him with the Super Big Slice.

Llumu Qhimil is voiced by Hideo Ishikawa (石川 英郎, Ishikawa Hideo?).

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, Go Jaraji Da?, 28): A porcupine Grongi. Destroyed when Amazon used his Jaguar Shock on him. Propheta Cruentus (プロフェタ・クルエントゥス, Purofeta Kuruentusu?, 28-29): 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, Kanponotasu Wāmu Makishira?, 28): A carpenter ant Worm destroyed by Decade's Dimension Kick. Bakeneko (バケネコ?, 28): A cat Makamou. Destroyed when Amazon used his Big Slice on him. Shocker Soldiers (ショッカー戦闘員, Shokkā Sentōin?) Shocker Scientists (ショッカー科学者, Shokkā Kagakusha?) Vigilantes (自警団, Jikeidan?): A volunteer military police formed from the residents of the World of Amazon who act in flushing out potential threats. Yobuko (ヨブコ?, 29): 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.

World of the Rider War
The World of the Rider War (ライダー大戦の世界, Raidā Taisen no Sekai?) is the iteration of reality where the Rider War takes place and is the reality that is the confluence of the Nine Worlds. The backdrop used to enter this world depicts all nine of the Heisei Riders, the DenLiner, Dragredder, Castle Doran, and Ryokuōzaru rushing at Decade, mirroring the very opening scene of the series.[25][26][27][28] Going into the World of the Rider War, the only "worlds" remaining are of Blade's, Kiva's and Hibiki's.

Yuki
Yuki (ユウキ, Yūki?) 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, Sōn Fangaia?, a sea cucumber Fangire) 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.[25][26]

As a Fangire, the Thorn Fangire belongs to the Aqua Class (アクアクラス, Akua Kurasu?) Tribe and her 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, Horobiyuku Saidan ni, Chinmoku yori Fukai Kisu o?).

Yuria Haga (芳賀 優里亜, Haga Yuria?) portrays Yuki, having portrayed the similar character Mio Suzuki in Kamen Rider Kiva. She is also known for her role as Mari Sonoda in Kamen Rider 555.

World of Kiva Kamen Riders
Wataru as Kamen Rider Kiva of the World of Kiva leads these two Kamen Riders in the World of the Rider War, fighting the World of Blade's Kamen Riders.

Kamen Rider Rising Ixa: Killed by Blade in the initial battle. Kamen Rider Saga: Fights in the initial battle and later kills Akira and Todoroki before being killed by Hibiki.

Fangires
Wataru also leads a group of Fangires (ファンガイア, Fangaia?), 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, Shāku Fangaia?): Destroyed by Diend. Silkmoth Fangire (シルクモスファンガイア, Shirukumosu Fangaia?): Destroyed by Diend. Horsefly Fangire (ホースフライファンガイア, Hōsufurai Fangaia?): Destroyed by Diend. Warthog Fangire (ウォートホッグファンガイア, Wōtohoggu Fangaia?): 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. [edit] World of Blade Kamen Riders Kazuma Kendate of the World of Blade leads the two remaining Kamen Riders in the World of the Rider War against the World of Kiva's Riders. When Super Apollo Geist speeds up the convergence of the Nine Worlds, the World of Blade is destroyed, taking all those from it with it.

Kamen Rider Garren: Appears in the initial skirmish between his world and Kiva's, Garren later shows up with Kazuma when they help Tsukasa fight Apollo Geist. Kamen Rider Leangle: Killed in the initial battle by Kiva as revenge for Rising Ixa's death.

Undead
The Undead (アンデッド, Andeddo?) 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, Diā Andeddo?): The Six of Spades Undead, destroyed by Diend. Scarab Undead (スカラベアンデッド, Sukarabe Andeddo?): The Ten of Spades Undead, destroyed by Diend. Lizard Undead (リザードアンデッド, Rizādo Andeddo?): The Two of Spades Undead, destroyed by Diend. [edit] World of Hibiki Kamen Riders Asumu leads the group of Kamen Riders from the World of Hibiki. With most of the other Oni dead, Asumu worries that all of his friends are dead and he is now alone.

Kamen Rider Todoroki: Todoroki is killed by Saga when he leads the Fangires in an assault against the World of Hibiki Riders. Kamen Rider Amaki: Along with Todoroki, she is killed by Saga when he leads the Fangires in an assault against the World of Hibiki Riders. [edit] Nine Worlds' Kaijin To fight Decade, Diend, Kuuga, Kiva, and Hibiki, Super Apollo Geist recreates the following kaijin from the Nine Worlds[27][28]:

Phylloxera Worm (フィロキセラワーム, Firokisera Wāmu?): Created by combining Worms. The Phylloxera Worm is destroyed by Diend. Tiger Orphnoch (タイガーオルフェノク, Taigā Orufenoku?):: Created by combining Orphenoch. The Tiger Orphnoch is destroyed by Decade Complete Form. Paradoxa Undead (パラドキサアンデッド, Paradokisa Andeddo?): Created by combining Undead. The Paradoxa Undead is destroyed by Kiva. Beetle Fangire (ビートルファンガイア, Bītoru Fangaia?): 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, Baffarō Rōdo Taurusu Barisuta?): Created by combining Lords. The Buffalo Lord is destroyed by Hibiki. Alligator Imagin (アリゲーターイマジン, Arigētā Imajin?): Created by combining Imagin. The Alligator Imagin is destroyed by Decade Complete Form.

World of Decade
The World of Decade (ディケイドの世界, Dikeido no Sekai?) is the version of reality that is the true home of Tsukasa Kadoya. It is the primary setting of Kamen Rider Decade: All Riders vs. Dai-Shocker. The backdrop used to enter this world depicts an old mansion that is the home of the Kadoya family.[29] This A.R. World is neither one of the Nine Worlds nor the New Worlds.

Sayo Kadoya
Sayo Kadoya (門矢 小夜, Kadoya Sayo?) is Tsukasa's younger sister. She is a pianist and is protected by Nobuhiko Tsukikage due to her possession of the Stone of the Earth, which is the source of Dai-Shocker's travel between the A.R. Worlds. This allows her to become High Priestess Bishium (大神官ビシュム, Daishinkan Bishumu?), whom Shadow Moon manpulated to hate Tsukasa and turn Yusuke into her puppet. After realizing that she has been used, she destroys the Stone of the Earth and later makes amends with Tsukasa before he leaves.[29]

Sayo Kadoya is portrayed by Moe Arai (荒井 萌, Arai Moe?).

Nobuhiko Tsukikage
Nobuhiko Tsukikage (月影 ノブヒコ, Tsukikage Nobuhiko?) is a butler who takes care of Sayo and convinces her to become Bishium as part of his plan take over Dai-Shocker. Through the Stone of the Moon, Nobuhiko can transform into Shadow Moon (シャドームーン, Shadō Mūn?). Once he ousts the former leader of Dai-Shocker, Tsukasa Kadoya, Nobuhiko becomes its leader as he leads the group to hunt down every Kamen Rider. In the end, though he overpowers Decade and Kuuga, Shadow Moon is defeated by Double and destroyed by the All Rider Kick.[29]

Nobuhiko Tsukikage is portrayed by Ryuichi Oura (大浦 龍宇一, Ōura Ryūichi?).

Jōji Yūki
Jōji Yūki (結城 丈二, Yūki Jōji?, read as "Joji Yu-ki" in "The Next Decade" PV) is a mysterious young man with a prosthetic arm who has the ability to become Riderman (ライダーマン, Raidāman?). He was a scientist who worked for Dai-Shocker and was involved in the production of the Decadriver and the Diendriver. For unknown reasons, Yūki rebelled against Dai-Shocker and was punished through the amputation of his arm.[29] This has made him a wanted man in the World of Decade.[30]

Jōji Yūki is portrayed by musical artist Gackt, a character also portrayed in his music video for "The Next Decade".

Dai-Shocker
The mysterious Dai-Shocker (大ショッカー, Daishokkā?, "Great Shocker") organization is a conglomation of all villain organizations who set into motion a plan to take over all dimensions due to someone providing the means to do so. Their insigna 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 and Apollo Geist, there are many other members of Dai-Shocker that come from previous Kamen Rider Series. They sent their agents out across the worlds for universal domination.

Ambassador Hell
Ambassador Hell (地獄大使, Jigoku Taishi?) is an executive member from the terrorist organisation Shocker, donning new black armor and able to assume the form of the Inhumanoid Garagaranda (ガラガランダ, Garagaranda?). He is killed when Riders 1 and 2 use a Double Rider Kick on him, reverting to his human form as he praises Dai-Shocker.

Ambassador Hell is portrayed by Ren Osugi (大杉 漣, Ōsugi Ren?) while Garagaranda is voiced by Kenichi Suzumura (鈴村 健一, Suzumura Ken'ichi?).

General Jark
General Jark (ジャーク将軍, Jāku Shōgun?) is a supreme commander from the Crisis Empire from the World of Black RX. He is killed by Diend.

Seizō Katō (加藤 清三, Katō Seizō?) reprises his role as the voice of General Jark.

King Dark
King Dark (キングダーク, Kingu Dāku?) is a giant robot and the mastermind behind the Government Of Darkness (GOD). He is killed by Decade Complete Form Jumbo Formation.

Dai-Shocker Soldiers
The Dai-Shocker Soldiers (大ショッカー戦闘員, Dai Shokkā Sentōin?) are footsoldiers of Dai-Shocker, resembling the Shocker Soldiers and tending to scream out "Yeee" (イーッ, Ī?). They are able to assume missile-like forms.

Dai-Shocker members in the World of Decade
Kaijin from the Shōwa Kamen Rider Series Shiomaneking (シオマネキング, Shiomanekingu?): A monstrous fiddler crab-like member of Shocker. Ganikomoru (ガニコウモル, Ganikōmoru?): A member of Gel-Shocker that is the combination of a crab and a bat. Destron Soldiers (デストロン戦闘員, Desutoron Sentōin?): The footsoldiers of Destron. Doras (ドラス, Dorasu?): A grotesque grasshopper that is the aspect of the Neo Organism. Cobra Man Garai (コブラ男ガライ, Kobura Otoko Garai?): An armored cobra-like kaijin who is the child of the Fog Mother. Grongi from Kamen Rider Kuuga Zu-Mebio-Da (ズ･メビオ･ダ, Zu Mebio Da?) A leopard kaijin. Me-Bajisu-Ba (メ･バヂス･バ, Me Bajisu Ba?): A wasp kaijin. Me-Ginoga-De (メ･ギノガ･デ, Me Ginoga De?): A mushroom kaijin. Go-Gadoru-Ba (ゴ･ガドル･バ, Go Gadoru Ba?): A rhinoceros beetle kaijin. Lords from Kamen Rider Agito Leiurus Acutia (レイウルス・アクティア, Reiurusu Akutia?): A scorpion kaijin. Formica Pedes (フォルミカ・ペデス, Forumika Pedesu?): A black carpenter ant kaijin. Formica Regia (フォルミカ・レギア, Forumika Regia?): A queen ant kaijin. Mirror Monsters from Kamen Rider Ryuki Sheerghost (シアゴースト, Shiagōsuto?): A dragonfly larva kaijin. Raydragoon (レイドラグーン, Reidoragūn?): A dragonfly kaijin. Psycorogue (サイコローグ, Saikorōgu?): A robotic cricket kaijin. Orphnoch from Kamen Rider 555 Butterfly Orphnoch (バタフライオルフェノク, Batafurai Orufenoku?): A butterfly kaijin. Giraffe Orphnoch (ジラフオルフェノク, Jirafu Orufenoku?): A giraffe kaijin. Longhorn Orphnoch (ロングホーンオルフェノク, Ronguhōn Orufenoku?): A longhorn beetle kaijin. Slug Orphnoch (スラッグオルフェノク, Suraggu Orufenoku?): A slug kaijin. Wild Boar Orphnoch (ワイルドボアオルフェノク, Wairudo Boa Orufenoku?): A wild boar kaijin. Pelican Orphnoch (ペリカンオルフェノク, Perikan Orufenoku?): A pelican kaijin. Stinkbug Orphnoch (スティンクバグオルフェノク, Sutinkubagu Orufenoku?): A stinkbug kaijin. Arch Orphnoch (アークオルフェノク, Āku Orufenoku?): A grasshopper kaijin. Undead from Kamen Rider Blade Elephant Undead (エレファントアンデッド, Erefanto Andeddo?): An elephant kaijin. Giraffa Undead (ギラファアンデッド, Girafa Andeddo?): A giraffe stag beetle kaijin. Darkroach (ダークローチ, Dāku Rōchi?): A cockroach kaijin. Makamou from Kamen Rider Hibiki Kappa (カッパ, Kappa?): A snapping turtle/frog kaijin. Bakeneko (バケネコ, Bakeneko?): A cat kaijin Hitotsumi (ヒトツミ, Hitotsumi?): A female kaijin Worms from Kamen Rider Kabuto Coleoptera Worm Aeneus (コレオプテラワーム・アエネウス, Koreputera Wāmu Aeneusu?): A scarab kaijin. Coleoptera Worm Croceus (コレオプテラワーム・クロセウス, Koreputera Wāmu Kuroseusu?): A scarab kaijin. Coleoptera Worm Argentum (コレオプテラワーム・アージェンタム, Koreputera Wāmu Ājentamu?): A scarab kaijin. Geophilid Worm (ジオフィリドワーム, Jiofirido Wāmu?): A centipede kaijin. Subst Worm (サブストワーム, Sabusuto Wāmu?): A crayfish kaijin. Cassis Worm Gladius (カッシスワーム・グラディウス, Kasshisu Wāmu Guradiusu?): A horseshoe crab kaijin. Imagin from Kamen Rider Den-O Albinoleo Imagin (アルビノレオイマジン, Arubinoreo Imajin?): A white lion kaijin. Mole Imagin (Axe Hand) (モールイマジン（アックスハンド）, Mōru Imajin (Akkusu Hando)?): A mole kaijin. Mole Imagin (Drill Hand) (モールイマジン（ドリルハンド）, Mōru Imajin (Doriru Hando)?): A mole kaijin. Mole Imagin (Cross Hand) (モールイマジン（クロスハンド）, Mōru Imajin (Kurosu Hando)?): A mole kaijin. Fangire from Kamen Rider Kiva Rat Fangire (ラットファンガイア, Ratto Fangaia?): A rat kaijin. Sungazer Fangire (サンゲイザーファンガイア, Sangeizā Fangaia?): A giant girdled lizard kaijin. Bat Fangire (バットファンガイア, Batto Fangaia?): A bat kaijin. Other Kaijin from Kamen Rider Decade Taurus Ballista (タウルス・バリスタ, Taurusu Barisuta?): The Buffalo Lord who appeared previously in Kamen Rider Decade.

World of Decade (Movie War 2010)
In Kamen Rider Decade: Final Chapter, Tsukasa, Kaitoh, and the Hikari Studio crew return to the World of Decade, now a battlefield of the Rider War and home to the evil Super Shocker organization. The backdrop for this world now depicts the destruction of the Nine Worlds.

Yuriko Misaki
Yuriko Misaki (岬 ユリコ, Misaki Yuriko?) is a girl who lives in this A.R. World who meets Tsukasa during his fight against Super Shocker. She follows Tsukasa, urging him along in his mission to be the destroyer of worlds. It is said that she died in a fight with the Bee Woman years in the past. Like her namesake from Kamen Rider Stronger, Yuriko has the ability to transform into Electro-Wave Human Tackle (電波人間タックル, Denpa Ningen Takkuru?).

Yuriko Misaki is portrayed by Alice Hirose (広瀬 アリス, Hirose Arisu?).

Super Shocker
The evil Super Shocker (スーパーショッカー, Sūpā Shokkā?) organization usurps the place 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.[31] They utilize the Super Crisis Fortress (スーパークライス要塞, Sūpā Kuraisu Yōsai?) as their base.

Bee Woman
The Bee Woman (ハチ女, Hachi Onna?) was previously a member of Shocker in Kamen Rider. She is now one of the high-ranking members of Super Shocker until being absorbed by the Neo Organism.

The Bee Woman is portrayed by Nao Oikawa (及川 奈央, Oikawa Nao?), who previously portrayed Kegalesia in Engine Sentai Go-Onger.

Neo Organism
The Neo Organism (ネオ生命体, Neo Seimeitai?) of Kamen Rider ZO is a pool of living fluid that relies on the very container its dwells in as its life support and assumes a grotesque Kamen Rider-like form known as Doras (ドラス, Dorasu?). Super Doctor Shinigami seeks to revive the Neo Organism in order to destroy Kamen Rider Decade. But once revived, it is beyond Super Shocker's control as it assimilates the Dummy Dopant to become Ultimate D (アルティメットD, Arutimetto Dī?), the most powerful kaijin of Super Shocker. But the monster soon meets its end through Decade and Double's Triple Extreme Rider Kick.

The Neo Organism is voiced by Yūtarō Honjō (本城 雄太郎, Honjō Yūtarō?), while Doras's vocal effects are provided by Keikō Sakai (酒井 敬幸, Sakai Keikō?).

Dummy Dopant
The Dummy Dopant (ダミー・ドーパント, Damī Dōpanto?) is a Dopant who assumes the forms of Father Robert Shijima, Erika Mutsuki, and Sokichi Narumi. It can also assume a tire-like form called the Dummy Wheel (ダミー･ホイール, Damī Hoīru?). Once exposed after being defeated as the fake Kamen Rider Skull and having its cover blown, the Dummy Dopant escapes to the World of Decade where he takes control of the Mammoth Mecha (マンモスメカ, Manmosu Meka?). He is later taken over by the Neo Organism as it used him to become the inhuman Ultimate D. The Dummy Dopant's origins and the Dummy Memory (ダミーメモリ, Damī Memori?) used are still unknown. In materials to promote the film, it was known as the "Mysterious Dopant" (なぞのドーパント, Nazo no Dōpanto?).

The Dummy Dopant is voiced by Toru Tezuka (手塚 とおる, Tezuka Tōru?), who also portrays Father Robert Shijima and his Death Dopant form in Kamen Rider Double: Begins Night.

Super Shocker Soldiers
The Super Shocker Soldiers (スーパーショッカー戦闘員, Sūpā Shokkā Sentōin?) are remodeled versions of the footsoldiers of Dai-Shocker, resembling the Shocker Soldiers and tending to scream out "Yeee" (イーッ, Ī?). Like the Dai-Shocker Soldiers they are also able to assume missile-like forms.

Other Super Shocker members
Kaijin from the Shōwa Kamen Rider Series  Kaijin from the Heisei Kamen Rider Series
 * Zanjioh (ザンジオー, Zanjiō?): A salamander kaijin of Shocker.
 * Jaguar Man (ジャガーマン, Jagā Man?) A jaguar kaijin of Shocker.
 * Poison Lizard Man (毒トカゲ男, Dokutokage Otoko?): A giant girdled lizard kaijin of Shocker.
 * Leech-Chameleon (ヒルカメレオン, Hiru Kamereon?): A member of Gel-Shocker that is the combination of a leech and a chameleon.
 * Cobra Man Garai (コブラ男ガライ, Kobura Otoko Garai?): An armored cobra kaijin of Fog.
 * Zu-Gooma-Gu (ズ･ゴオマ･グ, Zu Gōma Gu?): A vampire bat Grongi in Ultimate Form.
 * Go-Jaraji-Da (ゴ･ジャラジ･ダ, Go Jaraji Da?): A porcupine Grongi.
 * Volucris Falco (ウォルクリス・ファルコ, Worukurisu Faruko?): A falcon Lord.
 * Solospider (ソロスパイダー, Sorosupaidā?): A armored tetragnatha praedonia Mirror Monster.
 * Scorpion Orphnoch (スコーピオンオルフェノク, Sukōpion Orufenoku?): A scorpion Orphoch.
 * Titan (ティターン, Titān?): A scorpion/chameleon Undead.
 * Kodama (コダマ, Kodama?): A tree Makamou.
 * Sectio Worm Acuere (セクティオワーム・アクエレ, Sekutio Wāmu Akuere?): A mantis Worm.
 * Cobra Imagin (コブライマジン, Kobura Imajin?): A cobra Imagin.
 * Gecko Imagin (ゲッコーイマジン, Gekkō Imajin?): A gecko Imagin.
 * Sungazer Fangire (サンゲイザーファンガイア, Sangeizā Fangaia?): A giant girdled lizard Fangire.