Kamen Rider Heisei Generations Final: Build& Ex-Aid with Legend Riders is a 2017 Japanese film in the Movie War line of the Kamen Rider Series. It serves as a crossover between the television series Kamen Rider Build and Kamen Rider Ex-Aid. The film features the series' two lead heroes and their allies, with assistance from Kamen Rider OOO, Kamen Rider Fourze, Kamen Rider Gaim and Kamen Rider Ghost.