As Decade traverses the nine other rider dimensions, we encounter a myriad of various monsters that originate from them. Whether or not the Decade world has any is yet to be seen.
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Table of Contents
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Grongi
The Grongis are ancient humanoid creatures from Kuuga's world. Separated amongst various tribes by species and type, they live to compete against each other in a game that involves murdering a certain number of Humans in specific ways in accordance to the game's rules.
Me Gyarido Gi
Me Gyarido Gi is among the group of Grongis involved in the game of killing warrior women without spilling a drop of blood. In the hopes of the game's completion, he and the other participants attempted to awaken a so called ultimate darkness.
Ra Dorudo Gu
Ra Dorudo Gu is among the group of Grongis involved in the game of killing warrior women without spilling a drop of blood. In the hopes of the game's completion, he and the other participants attempted to awaken a so called ultimate darkness.
Go Baberu Da
Go Baberu Da is among the group of Grongis involved in the game of killing warrior women without spilling a drop of blood. In the hopes of the game's completion, he and the other participants attempted to awaken a so called ultimate darkness. It was also referred to Unidentified Life Form 9.
Go Bemiu Gi
Go Bemiu Gi is among the group of Grongis involved in the game of killing warrior women without spilling a drop of blood. In the hopes of the game's completion, she and the other participants attempted to awaken a so called ultimate darkness.
Me Biran Gi
Me Biran Gi is among the group of Grongis involved in the game of killing warrior women without spilling a drop of blood. In the hopes of the game's completion, he and the other participants attempted to awaken a so called ultimate darkness.
N Gamio Zeda
N Gamio Zeda is the "Ultimate Darkness" objective of the Grongi's game. Able to speak human languages fluently (Japanese being the only example), he claims himself to not supposing to exist. Despite the fact that he seemingly exerts no restraint in doing what he was awakened for.
Me Bajisu Ba
Me Bajisu Ba referred to Unidentified Life Form 47 in Agito's World.
Zu Mebio Da
Zu Mebio Da referred to Unidentified Life Form 48 in Agito's World.
Me Ginoga De
Me Ginoga De referred to Unidentified Life Form 49 In Agito's World.
Go Jaraji Da
Go Jaraji Da is a porcupine Grongi and also a member of Great Shocker who serve Apollo Geist.
Unknown
The Unknowns, known technically as the Lords, are creatures much similar to the Grongis of Kuuga's World. As the direct servants of their god, they claim to protect Humanity, and do so by hunting the most evolved.
Formica Pedes
Formica Pedes are Ant Lords who serve Taurus Ballista.
Taurus Ballista
Taurus Ballista is the much more powerful Buffalo Lord. With he Ant lords under his command, he hunts Ashikawa Shoichi for having tapped the power of Agito. He was later on recreated by Super Apollo Giest.
Formica Regia
Formica Regia is the Queen of the Ant Lords. She too is under the command of Ballista.
Propheta Cruentus
Propheta Cruentus is a Mantis Lord and also a member of Great Shocker who serve Apollo Geist.
Mirror Monsters
Mirror Monsters are various types of creatures that inhabit the Mirror World of Ryuuki's World. However, with the existence of the Advent Decks, some of these monsters can be contracted to the Riders of that world.
Raydragoons
Raydragoons are Dragonfly Mirror Monsters that live in the World of Negative, taking the guise of normal humans.
Orphnoch
The Orphnochs are the next step in Human evolution in Faiz's world. Superior to humans in almost every way, these beings however suffer from short lifespans and are typically created though a more evolved Human dieing.
Butterfly Orphnoch
The Butterfly Orphnoch is a student that was apparently unable to enter the Smart Brain High School due to being an Orphnoch.
Shukawa
Shukawa (The Lobster Orphnoch) is the sole female member of Lucky Clover, a group of high-ranked students secretly comprised of Orphnochs who attend Smart Brain High School.
Genda
Genda (The Dragon Orphnoch) is the athletic, thug-ish member of Lucky Clover.
Shirogane
Shirogane (The Centipede Orphnoch) is the intellectual member of Lucky Clover.
Momose
Momose (The Tiger Orphnoch) is is the ringleader of Lucky Clover. He is able to revive fallen Orphnochs. He was later on recreated by Super Apollo Giest.
Ogami Takumi
Ogami Takumi (The Wolf Orphnoch) is a timid individual who secretly uses the Faiz Gear to protect Smart Brain High School from Orphnochs, despite the fact that he himself is one.
Ox Orphnoch
Ox Orphnoch is a member of Great Shocker who serve Apollo Geist.
Worm Orphnoch
Worm Orphnoch is a member of Great Shocker who serve Apollo Geist.
Frilled Lizard Orphnoch
Frilled Lizard Orphnoch is a member of Great Shocker who serve Apollo Geist.
Undead
The Undead are ancient creatures from Blade's World. Each creature representing a different species, they fight amongst each other and against Humans in order to bring forth the species they represent into dominance as the ruling species of Earth.
Kamata
Kamata (The Paradoxa Undead) is the sub editor for Atashi Journal under Momoi Reiko. After disposing of her for believing that she was close to revealing his true nature, he enters the Rider Battle as Abyss in order to ensure that his true identity is kept secrete. He is the category King of Chalice. He was later on recreated by Super Apollo Giest.
Buffalo Undead
The Buffalo Undead is a Category 8 Undead.
Elephant Undead
The Elephant Undead is a Category Jack Undead.
Capricorn Undead
The Capricorn Undead is a Category Queen Undead.
Joker
The Joker is the 53rd Undead in which Shijo Hajime along with Kamata revive using Board's Rider buckles.
Deer Undead
The Deer Undead is a Category 6 Undead.
Scarab Undead
The Scarab Undead is a Category 10 Undead.
Lizard Undead
The Lizard Undead is a Category 2 Undead.
Roach
Roach are another race of Undeads.
Jashin 14
Jashin 14 is the leader of the Roach, turning human into mindless slaves.
Bossroach,
Bossroach is a stronger Roach resembling Caucasus Undead and watch over humans race.
Darkroaches
Darkroaches are Category Unknown Undead, acting like Jashin 14's solider.
Makamo
The Makamo are creatures of various shapes and sizes based off of monsters of Japanese myth from Hibiki's world. They primarily inhabit rural or forest regions and live to feed off of Humans so that they may grow into enormous monsters.
Kappa
The Kappa is a bipedal turtle monster. In contrast to the common characteristic of common turtles, A Kappa apparently is able to move considerably fast.
Bakeneko
The Bakeneko is a cat monster that reproduces via removing one of it's tails. With a tail removed, a new monster is grows from the severed tail.
Tengu
The Tengu is a bird monster, possessing a great level of strength.
Gyuki
Gyuki is the result of an Oni who has lost control over his or her power. Apparently a very rare occurrence, as it's largely believed amongst Oni to be one legendary Makamo.
Bakegani
The Bakegani is a giant crab monster, possessing an extra set of pincers.
Bakeneko
The Bakeneko is a cat monster and also a member of Great Shocker who serve Apollo Geist.
Yobuko
Yobuko transformed into a Makamo as a reward by Llumu Qhimil using the powers of both the GiGi and GaGa armlets on him.
Worm
Worms are a species of bipedal insect aliens from Kabuto's world. Able to mimic Humans right down to their own personalities, they set out to invade Earth.
Coleoptera Worm
The Coleoptera Worm is a Worm that found himself hunted by ZECT.
Geophilid Worm
The Geophilid Worm is a among the various Worms that tried to kill Mayu.
Subst Worm
The Subst Worm is a among the various Worms that tried to kill Mayu.
Mayu
Mayu (The Sisyra Worm) is a cheerful young girl who runs a small Oden restaurant with her grandmother. Despite her seemingly bright outlook on life, she bears deep animosity towards Kabuto. Believing that he is responsible for the death of her older brother.
Otogiri So
Otogiri So (The Phylloxera Worm) is an influential member of Zect and the user of TheBee. With a chip on his shoulder in regards to Kabuto for taking his right eye, he secretly concocts a new scheme to finally take down the rogue Rider and consummate his vengeance. He was later on recreated by Super Apollo Giest.
Brachypelma Worm Aurantium
**Brachypelma Worm Aurantium ** is a tarantula Worm and also a member of Great Shocker who serve Apollo Geist.
Brachypelma Worm Viridis
Brachypelma Worm Viridis is a tarantula Worm and also a member of Great Shocker who serve Apollo Geist.
Tarantes Worm Purpura
Tarantes Worm Purpura is a tarantula Worm and also a member of Great Shocker who serve Apollo Geist.
Camponotus Worm Maxilla
Camponotus Worm Maxilla is a carpenter ant Worm and also a member of Great Shocker who serve Apollo Geist.
Imagin
The Imagins are bodiless time travelers from Den-O's world. These individuals have traveled from the future in order to alter their original time to their own preferences. Gaining physical bodies through the the imagination of the person they contract. By fulfilling their contract through any means of their own discretion, they are able to travel through the contractee to his or her most memorable moment within their life.
Momotaros
Momotaros (The Oni Imagin) is the hot headed, ill tempered Imagin contracted to Nogami Ryotaro. Due to the distortions in time done on by other Imagins, he had forgotten who he was and what his physical form looked like.
Mole Imagin
The Mole Imagin(s) acts as the henchmen for the Alligator Imagin.
Urataros
Urataros (The Turtle Imagin) is the suave, ladies-man-esque Imagin contracted to Nogami Ryotaro. Due to the distortions in time done on by other Imagins, he had lost his physical form, but seemingly still knew who he was.
Kintaros
Kintaros (The Bear Imagin) is the excessively strong, narcoleptic Imagin contracted to Nogami Ryotaro. Due to the distortions in time done on by other Imagins, he had lost his physical form, but seemingly still knew who he was.
Ryuutaros
Ryutaros (The Dragon Imagin) is the energetic, callow fourth Imagin to contract Nogami Ryotaro. Due to the distortions in time done on by other Imagins, he had lost his physical form, but seemingly still knew who he was.
Alligator Imagin
The Alligator Imagin is among the Imagins responsible for the recent chain of time distortions. In order to stay hidden, he can enter the bodies of unsuspecting Humans. He was later on recreated by Super Apollo Giest.
Scorpion Imagin
The Scorpion Imagin is a member of Great Shocker who serve Apollo Geist.
Fangire
The Fangires are the most prominent monster race from Kiva's world. These Stain Glass monsters feed and sustain themselves by consuming the life force of Humans, leaving their fallen prey in a transparent glass like state. Much like the other races, they're based off of monsters of western (primarily European) pop culture, myth and folklore. In this case, Vampires.
Itoya Ryo
Itoya Ryo (The Spider Fangire) is an upbeat, mild mannered (yet somewhat eccentric) Fangire. After feeling discriminated because of being a Fangire by Kadoya Tsukasa and Hikari Natsumi, he brings the laws between Humans and Fangires to their attention.
Rook
Rook (The Lion Fangire) is among the monsters sworn to enforce the law between the Fangires and Humans, maintaining peace between them.
Bishop
Bishop (The Swallowtail Fangire) is among the monsters sworn to enforce the law between the Fangires and Humans, maintaining peace between them.
Wataru's Father
Wataru's Father (The Beetle Fangire) is a broken man, disapproving of the peaceful laws between the Fangires and the Humans. With this, he storms Doran, taking the throne and abolishing said laws, believing that the Fangires have the right to feed on Humans. He was later on recreated by Super Apollo Giest.
Seamoon Fangire
Seamoon Fangire is a member of Great Shocker who serve Apollo Geist.
Mantis Fangire
Mantis Fangire is a member of Great Shocker who serve Apollo Geist.
Shark Fangire
Shark Fangire is one of the Fangire lead by Wataru.
Silkmoth Fangire
Silkmoth Fangire is one of the Fangire lead by Wataru.
Horsefly Fangire
Horsefly Fangire is one of the Fangire lead by Wataru.
Warthog Fangire
Warthog Fangire is one of the Fangire which Yuki summoned.
Yuki
Yuki (The Thorn Fangire) a sea cucumber Fangire who is the Queen of the Fangire in Kiva World. She wants to protect the Kiva World and married Guy.
Other Monsters
Wolfen
The Wolfens of Kiva's World are another race of monsters able to feed off of Humans. Much like the other races, they're based off of monsters of western (primarily European) pop culture, myth and folklore. In this case, Lycanthropes, specifically Werewolves or Wolf-men.
Garulu
This as of yet unnamed Wolfen serves Wataru as the Arms Monster Garulu. As a personal attendant to Wataru, he, along with the other monsters, tries to look out for Wataru for his well being and to maintain order in Castle Doran. Through Kiva, he can become the Garulu Saber.
Merman
The Mermen of Kiva's World are another race of monsters able to feed off of Humans. Much like the other races, they're based off of monsters of western pop culture, myth and folklore. In this case, the Gill-Man.
Basshaa
This as of yet unnamed Merman serves Wataru as the Arms Monster Basshaa. As a personal attendant to Wataru, he, along with the other monsters, tries to look out for Wataru for his well being and to maintain order in Castle Doran. Through Kiva, he can become the Basshaa Magnum.
Franken
The Frankens of Kiva's World are another race of monsters able to feed off of Humans. Much like the other races, they're based off of monsters of western pop culture, myth and folklore. In this case, Frankenstein's Monster.
Dogga
This as of yet unnamed Franken serves Wataru as the Arms Monster Dogga. As a personal attendant to Wataru, he, along with the other monsters, tries to look out for Wataru for his well being and to maintain order in Castle Doran. Through Kiva, he can become the Dogga Hammer.
Kivat
The Kivats of Kiva's World are a different race of monsters who are symbiotic. Although not Humanoid in shape, Kivats posses the most coveted power amongst the monster races in Kiva's World. The Kivats are a based off of Vampire bats.
Kivat Bat III
Kivat Bat III is a member of the Kivat race. With a sharp wit, he tries to often act as a voice of reason and encouragement for Wataru. As well as acting as the medium to allow Wataru to transform into Kiva, he's also able use of the fustles that summon the Arms Monsters that grant Kiva different forms and can awaken the power for Kiva's Darkness Moon break.
Kivahla
Kivahla, a member of the Kivat race, is a seemingly mischievous yet mysterious small little bat. Able to traverse the nine other worlds, she appears to be in league with Narutaki in trying to destroy Kadoya Tsukasa.
Doran
The Dorans were a race of large dragons. Little information has been provided on them, thus it is unknown if they died out or if any more exist and roam free.
Castle Doran
Castle Doran is a Dragon that was captured by the Fangires and was transformed into a castle. It houses the Arms Monsters acts as the main headquarters for the Fangires.
Gedoshu
Gedoshu are villains from Samurai Sentai Shinkenger who originates from the Sanzu River, entering humans world by gap.
Ayakashi
Ayakashi are monster which enter the human world, under control by the leading member of Gedoshu.
Chinomanako
Chinomanako is a member of Ayakashi Race. He transformed into Chinomanako Diend Form by stealing Diendriver.
Nanashi Company
Nanashi Company are foot solider who assist the Ayakashi on the battlefield.
Crisis Empire
Crisis Empire are the evil organization in BLACK RX World.
Schwarian
Schwarian is one of the warrior from Crisis Empire. He joined the Great Shocker after that.
Chaps
Chaps are Crisis Empire's foot solider.
Gorgom
Gorgom are the evil organization in BLACK World.
Rhinoceros Mutant
Rhinoceros Mutant a mutant of Gorgom and also a member of Great Shocker who serve Apollo Geist.
| KAMEN RIDER DECADE |
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| Decade | Diend | Other Riders |
| Characters | Monsters |
| Episodes |
| Preceeded by Kiva | Succeeded by Double |





