This article is about a/an episode in Kamen Rider Zi-O.

Best Friend 2121 (ベスト・フレンド2121 Besuto Furendo Nisen-hyakunijūichi) is the twenty-fourth episode of Kamen Rider Zi-O. It features the debut of Woz Futureing Kikai, and the brief appearances of the GeizRevive Ridewatch and Another Zi-O Watch.


In order to access the powers of Kamen Rider Kikai, Sworz uses Heure as a catalyst, forcing him to become Another Kikai! White Woz attempts to strip them of that power so he can grant it to Geiz to make him even more powerful. Meanwhile, Time Jacker Ora has a lot on her mind, as she makes her way to 9 5 DO with some suggestions. Furthermore, Rento is busy rampaging around the year 2121! Sougo decides to work together with the local children to find a way to stop him, but...


"(Snores) (wakes up) According to this book, average high schooler Sougo Tokiwa embarks on a path which leads him to become the demonic king of time, Ohma Zi-O. Another Kikai appears before him. Neither myself, nor White Woz, nor The Time Jackers recognize this Another Rider. He’s an unknown Another Rider and it is somehow tide to Kamen Rider Kikai whom my lord meets in a dream."


Guest Cast

Suit Actors

Forms and Collectibles Used


  • Watch used:
    • Zi-O
      • Zi-O Ridewatch II
    • Geiz
      • Geiz
  • Rider Armor(s) used:
    • Zi-O
      • Zi-O II
    • Geiz
      • N/A


  • Watch used:
  • Form(s) used:
    • Woz
      • Futureing Kikai


  • to be added


  • Count at episode end,
    • Watches in Zi-O's possession: Zi-O, Fourze, OOO, OOO Tadajol Combo, Gaim, Kodama, Decade, W, Zi-O II, Phone, Bike, Kuuga
    • Watches in Geiz's possession: Geiz, Cross-Z, Ghost, Drive, Faiz, Wizard, Genm, Build, Ex-Aid, Phone, Bike, GeizRevive (Blank)
    • Watches in Tsukuyomi's possession: Phone, Taka
    • Watches In Woz’s possession: Woz, Shinobi, Quiz, Kikai
    • Watches In Swartz's possession: Another Zi-O
  • This episode marks the first time Sougo uses Zi-O II's Twice Time Break, as opposed to a King Giri Giri Slash.
  • This is the last episode to have an Another Rider to exist with the right year of the original rider had born. Starting from the next episode, all the Another Riders are stated in 2019 instead.

External links


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