Kamen Rider Geats × Revice: Movie Battle Royale (仮面ライダーギーツ×リバイス MOVIEムービーバトルロワイヤル, Kamen Raidā Gītsu × Ribaisu Mūbī Batoru Rowaiyaru) is a Japanese superhero crossover film between Kamen Rider Geats and Kamen Rider Revice, and is the 13th Movie War. The film also commemorates the 20th anniversary of Kamen Rider Ryuki and features supporting roles from Ryuki, Knight, and Ouja. In the film, Ikki and Ace battle to reclaim Koshiro's demon from the clutches of Colus, an evil Game Master who has pitted the Riders in the Desire Royale against the Mirror World Riders and the powerful Kamen Rider Seeker.