This article is about a/an episode in Kamen Rider Build.

Legacy of Doubt (疑惑のレガシー Giwaku no Regashī) is the forty-second episode of Kamen Rider Build. It features the debut of Shinobu Katsuragi as Kamen Rider Build and the Silver Dragon Fullbottle before its appearance in Kamen Rider Build: Be The One.


Sento’s father, Shinobu Katsuragi, is alive and is working alongside Evolto! This kind of information is starting to greatly worry the Build team. It seems that Shinobu’s mission is to collect all of the Lost Bottles and add them to the black Pandora Panel. There is even the possibility that Shinobu could be the one who is really pulling the strings. Regardless, Sento believes in the righteous purpose of the system that his father developed, the Rider System. But just then, another Build appears before Sento.


to be added


Guest Casts

Suit Actors

Forms and Collectibles Used


  • Bottle used:
    • Build
      • Sento
        • Biotic: N/A 
        • Abiotic: N/A
        • Other: Genius, FullFull RabbitTank (in Fullbottle Buster)
      • Shinobu
        • Biotic: Ninjya (offscreen), Rabbit
        • Abiotic: Comic (offscreen), Tank
    • Cross-Z
      • Biotic: Dragon Magma, Silver Dragon (in Cross-Z Magma Knuckle)
      • Abiotic: N/A
      • Other: Cross-Z Magma Knuckle
    • Rogue
      • Biotic: Crocodile Crack
      • Abiotic: N/A
    • MadRogue
      • Biotic: Bat
      • Abiotic: Engine
  • Form used:
    • Build
      • Sento
        • Genius Form
      • Shinobu
        • NinninComic Form (offscreen), RabbitTank Form
    • Cross-Z
      • Cross-Z Magma


  • Jelly used:
    • Grease
      • Robot


  • Bottle used:
    • Evol
      • Biotic: Cobra, Rabbit (in Steam Rifle)
      • Abiotic: Rider
      • Other: Evol Trigger
  • Form used:
    • Evol
      • Black Hole Form (Phase 4: Perfection)


  • to be added


Cross-ZBuild CS
  • Closing Screen Fullbottles:
    • Fullbottles:
      • Biotic: Silver Dragon, Gold Rabbit
      • Abiotic: N/A
  • Count at episode end
    • Bottles in Build (Sento)'s possession: RabbitTank Sparkling, FullFull RabbitTank, Genius
    • Bottles in Build (Shinobu)'s possession
      • Biotic: Rabbit, Ninjya
      • Abiotic:Tank, Comic
    • Bottles in Cross-Z's possession:
    • Bottles in Rogue's possession: Crocodile Crack
    • Bottles in Evol's possession:
      • Biotic: Gorilla, Taka, Panda, Harinezumi, Lion, Kaizoku, Octopus, Phoenix, Wolf, Unicorn, Rose, Turtle, Kabutomushi, Kuma, Dog, Santa Claus, Spider, Tora, Kujira, Shika, Kirin, Penguin, Obake, Same, Hachi, Sai
      • Abiotic: Diamond, Gatling, Rocket, Syoubousya, Soujiki, Lock, Densya, Light, Robot, Smapho, Keshigomu, Helicopter, Watch, Camera, Televi, Mic, Cake, Reizoko, UFO, Jet, Pyramid, Senpuki, Sukebo, Magnet, Bike, Sensuikan, Dryer, Castle
    • Bottles in MadRogue's possession:
      • Biotic: Bat
      • Abiotic: Engine
    • Jellies in Grease's possession: Robot, Dragon
    • Evolbottles in Evol's possession:
      • Biotic: Cobra, Rabbit
      • Abiotic: Rider
    • Evolbottles in Cross-Z's possession:
    • Lost Bottles in Evol's possession:
      • Biotic: Bat, Cobra, Shimauma, Fukurou, Kuwagata
      • Abiotic: Hasami
  • With six, this episode has highest number of characters to appear in narration of Kamen Rider Build and (currently) overall Kamen Rider Series.
MSG Retool in Build
  • The invention object of young Takumi Katsuragi is modified from the Modeling Support Goods toyline made by Kotobukiya.

External links


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