Kamen Rider Zi-O: The post-credits scene takes place some time after episode 2, since Sougo is in possession of the Build Ridewatch and indirectly implies he knows Sento's identity.

However, the conclusion of the film shows those Fullbottles have reverted back to their original state and are seen to evolve again at the end of the series.

Despite the evolution of the Rabbit and Dragon Fullbottles in the series, Sento is able to use RabbitTank Form and the Fullbottles appear to be in their normal state at the start of the film, only to evolve before the climax fight.

The post-credits scene with Zi-O's cameo takes place during the events of episode 46, shortly after the creation of the White Pandora Panel and before Sento's mental conversation with Takumi.

Kamen Rider Build: This movie takes place shortly after the announcement of the three new governors in episode 45.

He fights the villains before using the Vortex Time Break. He uses the Build Ridewatch and jumps off the cliff, transforming mid-fall. Sento and Zi-O briefly talk and Zi-O comments how he already has Build’s power. Sento begins to see Zi-O's helmet starting to pronounce from his insignia and then his eyes. Zi-O arrives in and then exits out the Time Mazine. All of the Heisei Riders are there fighting their respective final villains. He is teleported to an outside location and overhears fighting over the side of a cliff. In a post-credits scene, Sento is working on the White Pandora Box panel when it suddenly opens up a bottle that engulfs him. Sento and Ryuga use it to transform into Build Cross-ZBuild Form.

The Gold Rabbit and Silver Dragon Fullbottles fuse into the Cross-ZBuild Can. Misora uses her powers to free Ryuga from Kengo’s control. Gentoku and Kazumi appear and fight the Scissors and Zebra Lost Smash. Blood takes the Pandora Box down into the ground, heading for the center of the Earth so that he can destroy the planet. Sento manages to pull Ryuga out of Blood. Takumi then asked why he became a scientist and his father replied 'For love and peace'. They fight and Sento recalls one of Takumi's memory's in which his father told him that Ryuga holds the key to all the events to come. Kengo reveals that his encounter with Ryuga was orchestrated. Kengo becomes Kamen Rider Blood and Sento transforms into Build Genius Form. Sento arrives on his bike with the Pandora Box. Ryuga, Kengo, Mitsuomi and Ryoka are outside, surrounded by civilians under their control. Kengo contacts Sento and demands the Pandora Box in exchange for Ryuga’s life. Later, Utsumi offers to break Kazumi and Gentoku out of captivity if they beg.

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