Kamen Rider Heisei Generations Forever

is a 2018 Japanese superhero film in the Movie War line of the Kamen Rider Series. It serves as a crossover between the television series Kamen Rider Zi-O and Kamen Rider Build and is the third film of the Generations series. Aside the casts of Zi-O and Build, the casts of Kamen Rider Den-O and Kamen Rider W also participate, as well as some lead actors from other Kamen Rider Series performing voice-only cameos. The film was released nationally in Japan on December 22, 2018. This is the last Heisei-era Kamen Rider movie, released four months before the 2019 Japanese imperial transition.

Plot
Sougo Tokiwa/Kamen Rider Zi-O and Sento Kiryu/Kamen Rider Build must join forces with all the Kamen Riders of the Heisei era against Tid, a Super Time Jacker who intends to erase the entire history of Heisei Kamen Riders.

Cast

 * Zi-O cast
 * Classmate:
 * Classmate:
 * Classmate:
 * Classmate:
 * Classmate:
 * Classmate:
 * Classmate:


 * Build cast


 * Returning cast


 * Heisei Generations Forever cast
 * Ataru's father:
 * Ataru's mother:
 * Young Ataru:
 * Ataru's father:
 * Ataru's mother:
 * Young Ataru:

Theme song

 * Arrangement: Daisuke Asakura
 * A medley of the opening theme songs from all 20 Heisei Kamen Rider television series from Kamen Rider Kuuga to Kamen Rider Zi-O.
 * A medley of the opening theme songs from all 20 Heisei Kamen Rider television series from Kamen Rider Kuuga to Kamen Rider Zi-O.

Reception
Kamen Rider Heisei Generations Forever grossed $12,587,899 at the box office.