Flash Kamen — Rider Build

The “Flash” motif leans heavily into the Showa era—specifically V3 and Stronger —but wraps it in Build’s signature alchemical circles. The result is a suit that looks both retro and futuristic. (If Bandai releases this as a premium figure, it will sell out in seconds.)

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In the fan theory, Flash Build doesn’t use two random bottles. Instead, it requires the “Light” FullBottle and the “Speed” FullBottle —two theoretical components that complete the “Best Match” equation of opposites colliding. Could This Appear in the Canon? Sadly, with Build long finished and the cast moving on to New World crossovers, a true “Flash Form” is unlikely to hit the TV screen. However, the mobile game Kamen Rider: City Wars recently teased a limited-time “Photon Rider” skin that bears a striking resemblance to this concept. flash kamen rider build