This article is about a/an Dopant identity in Kamen Rider W.

Cockroach Dopant (コックローチ・ドーパント Kokkurōchi Dōpanto) is the Dopant form assumed when one uses the Cockroach Gaia Memory. [1]

Dopant Form

Cockroach Dopant

Cockroach Dopant

  • Height: 220cm
  • Weight: 138kg

The Cockroach Dopant's abilities include the ability to climb along walls and to move faster than oncoming attacks, much like a cockroach. Only Kamen Rider Double LunaTrigger's homing attacks are able to hit it.



Main article: Ikari
Ikari W


The main user of the Cockroach Memory was Ikari (伊刈), a sociopathic dōjinshi artist who ran the Dark Bug Exterminator website, a blog where people wrote down the names of those they want dead and he carried out the deed as the Cockroach Dopant (コックローチ・ドーパント Kokkurōchi Dōpanto), writing about his adventures in his self-published manga as the hero "Gokistar" (ゴキスター Gokisutā, portmanteau of "Cockroach" (ゴキブリ Gokuburi) and "star"). With his Dopant form's speed, he stole the Luna, Trigger, Heat, and Metal Memories from Kamen Rider Double. Ikari then decided to take the rest of Double's arsenal to become more powerful. However, after Philip learnt the Heaven's Tornado dance and used it against the Cockroach Dopant, the Gaia Memories are retrieved, allowing for the Cockroach Memory to be destroyed by Double LunaTrigger's Trigger Full Burst Maximum Drive.

Zenkuji mercenary

An unknown man hired by the Zenkuji family used a Cockroach Memory and tried to fight Kamen Riders Double and Accel, though he loses. Kamen Rider W: ~The One Who Continues After Z~


Main article: C


A member of EXE, known as "C" (C(シー) Shī), possessed a second Cockroach Memory (コックローチメモリ Kokkurōchi Memori). He transformed into the Cockroach Dopant (コックローチ・ドーパント Kokkurōchi Dōpanto) to fight Shotaro as Kamen Rider Joker, but was easily defeated by his Rider Kick. Goodbye to the E/A Bouquet of Justice to This City

Super Hero Taisen

However, a revived Cockroach Dopant appeared in Kamen Rider × Super Sentai: Super Hero Taisen as a member of Dai-Shocker. The Dai-Shocker later revealed their alliance with Dai-Zangyack and battled an army of Kamen Riders and Super Sentai. He was seen fighting TimePink, GingaYellow, MagiBlue, and Kamen Rider 1, but his fate wasn't certain in the movie, or his human identity.

Movie War Ultimatum

The Cockroach Dopant makes an reappearance in Kamen Rider × Kamen Rider Wizard & Fourze: Movie War Ultimatum, as one of the revived members of the Monster Army that Wizard faced in his portion of the movie. He ran off when Poitrine finished off the grunts that had followed them.


Narumi Detective Agency
Shotaro Hidari - Philip - Akiko Narumi - Sokichi Narumi† - Tokime
Double Driver - Accel Driver - Lost Driver - Gaia Memories - Memory Gadgets - Fang Memory - Xtreme Memory - Trial Memory - Gaia Memory Enhancing Adapter - Metal Shaft - Trigger Magnum - Engine Blade - Skull Magnum - Prism Bicker - Eternal Edge - RevolGarry - HardBoilder - Gunner A - Shroud Magnum - SkullBoilder - SkullGarry
The Fuuto Irregulars
Santa-chan - Watcherman- Queen & Elizabeth - Isamu Bito
Futo Police Department
Ryu Terui - Mikio Jinno - Shun Makura
Museum and the Dopants
Foundation X
The Sonozaki Family: Terror - Claydoll - Taboo/R Nasca - Nasca - Smilodon - Masquerade Dopants
Dopants: Magma Dopant - T-Rex Dopant - Money Dopant - Anomalocaris Dopant - Cockroach Dopant - Sweets Dopant - Virus Dopant - Violence Dopant - Arms Dopant - Bird Dopant - Ice Age Dopant - Triceratops Dopant - Liar Dopant - Puppeteer Dopant - Invisible Dopant - Nightmare Dopant - Beast Dopant - Zone Dopant - Yesterday Dopant - Quetzalcoatlus Dopant - Gene Dopant - Jewel Dopant - Old Dopant - Utopia Dopant - Energy Dopant
Movie Exclusive Villains: Dummy Dopant - Heat Dopant - Trigger Dopant - Metal Dopant - Luna Dopant - Cyclone Dopant - Bat Dopant - Spider Dopant - Kamen Rider Eternal - Commander Dopant - Eyes Dopant
Manga Exclusive Villains (Futo Detective): Road Dopant - Aurora Dopant - Meganeura Dopant -Brachiosaurus Dopant - Scream Dopant - Alcohol Dopant - Puzzle Dopant - Reactor Dopant - Antlion Dopant - Owl Dopant - Trash Dopant
Katsumi Daido - Maria S. Cranberry - Reika Hanehara - Kyosui Izumi - Gozo Domoto - Ken Ashihara
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