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Icon-decade.pngThis article is about an episode in Kamen Rider Decade.

Black × Black RX (BLACK×BLACK RX, Burakku × Burakku Āru Ekkusu) is the twenty-seventh episode of Kamen Rider Decade. It is the concluding part of the World of Black RX/World of Black arc.


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Following Apollogeist into another A.R. World, Decade is attacked by Kamen Rider Black until Diend arrives and summons Femme to hold him off. The next day, after learning that he is in the World of Black and seeing that he is on his own in saving Natsumi, Decade ambushes Guy as Ryuki and fights him until he uses a little girl as his hostage. When Decade takes a hit from Diend to save the child, Black watches and has second thoughts about him as Apollogeist escapes. After explaining that Apollogeist came to the world before and recruited the cult Gorgom into Dai-Shocker, Kotaro reveals that Joe the Haze ended up in his world and has been helping him fend off Dai-Shocker's endless army. Shvarian arrives and sends the Scorpion Imagin and Mantis Fangire after Decade and Black. Using Faiz's power, Decade destroys the two monsters as Shvarian summons the Chaps, allowing Tsukasa to make it back to World of Black RX as Apollogeist summons a pack of Orphnoch and Worms. The numbers even out as Daiki arrives and use Decade's card to summon the World of Black's Kotaro. With Black and Black RX fighting with them, Decade and Diend battle the monsters as Decade assumes Complete Form and uses Agito Shining Form's power to destroy Shvarian. After getting the Perfecter from Apollogeist, Diend steals it as Yusuke arrives to tell Tsukasa that Natsumi is about to die. Once there, Daiki shows up to give the Perfecter to Tsukasa, who uses a bit of his life force to revive Natsumi and bring her back to life. Black and Black RX continue their battle Apollogeist until he is escapes into another A.R. World with Narutaki comments that Decade is to blame for Dai-Shocker. After checking up on Kotaro and telling him that Joe is aiding his other self, Tsukasa returns to the Hikari Studio where he and his friends venture into the next world.


Guest stars

Suit actors

Rider Cards

  • Card Used:
    • Kamen Rider Decade:
      • Kamen Ride: Decade, Ryuki
      • Attack Ride: N/A
      • Form Ride: Faiz Axel
      • Final Form Ride: N/A
      • Final Attack Ride: Agito
      • Final Kamen Ride: Decade Complete
      • K-Touch: Agito Shining
    • Forms:
    • Kamen Rider Diend
      • Kamen Ride: Diend, Femme, Black
      • Attack Ride: N/A
      • Final Form Ride: N/A
      • Final Attack Ride: N/A


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New Worlds #6: Amazon

DVD releases

Kamen Rider Decade Volume 7, DVD cover

Kamen Rider Decade Volume 7 features episodes 27-31: Black × Black RX, Amazon, Friend, The Strong, Naked, Strong Guy, Rider War: Prologue and The Destroyer of Worlds. [1]

Kamen Rider Decade Box, Blu-ray cover

Blu-ray Box comes with all 31 episodes.


External links