シャドームーン
Shadow Moon returns to life and revives five mutants previously defeated by the Kamen Riders to serve as his personal army. He plots to defeat the Kamen Riders with his army in order to conquer the world. Berry witnesses Shadow Moon's plot and is attacked by the mutants. Masato and his sister Ayumi stumble onto an injured Berry by chance and are chased by the revived mutant army as a result.