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Villain Overview

The Smash are monsters engineered by the Faust organization and antagonists in Kamen Rider Build.

They are created when a human is injected with Nebula Gas, triggering a rapid cell division and causing them to lose their sense of consciousness, turning them into a rampaging monster. In order for a Smash to be reverted back to a human, it must be defeated and have its Nebula Gas absorbed into an empty Fullbottle.

Later on, during Faust's alliance with Hokuto, a new type of Smash was created called the "Hard Smash", which would possess the superhuman abilities of a Smash while also retaining its human consciousness. The Hokuto Three Crows were each turned into a Hard Smash, becoming elite soldiers of Hokuto under the command of Kamen Rider Grease.

Following Hokuto's defeat and occupation by Seito, a new type of Smash called "Clone Smash" was engineered by Namba Heavy Industries, which did not require a human host.

Eventually, Faust developed the final form of Smash, "Lost Smash", created by infusing an empty Fullbottle with the essence of a Clone Smash. To engineer Lost Smash, Evol ambushed Kamen Rider Grease and stole the Fullbottles of the Hokuto Three Crows, planning to use the Lost Smash to destroy the world.



Smash Hazard

Hard Smash

Clone Smash

Lost Smash


           BUILD LOGO.png Villains

Night Rogue | Blood Stalk | Takumi Katsuragi | Nariaki Utsumi | Shingo Kuwata | Eita Kawai | Masahiro Nabeshima | Norio Matsui | Yoshikazu Takahashi | Shinobu Katsuragi | Faust Guardians

Yoshiko Tajimi | Blood Stalk | Kazumi Sawatari | Hokuto Three Crows | Akaba | Aoba | Kiba | Massugu Ubukata | Hokuto Guardians

Masakuni Mido | Kamen Rider Rogue | Fu Washio | Rai Washio | Seito Guardians | Hard Guardians

Namba Heavy Industries Ltd.
Juzaburo Namba | Nariaki Utsumi | Fu Washio | Rai Washio | Sawa Takigawa | Kaisei Mogami | Guardians | Hard Guardians

Blood Tribe
Killbus | Evolt | Kengo Ino | Ryoka Saiga | Mitsuomi Gohara

Needle Smash | Strong Smash | Burn Smash | Flying Smash | Press Smash | Ice Smash | Stretch Smash | Fang Smash

Simon Marcus | Keiji Uraga | Phantom Crushers | Guardians | Hard Guardians