Kamen Rider X: Five Riders vs. King Dark (1974)

King Dark, leader of G.O.D (Government of Darkness) has his scientists create a new monster, Frankenbat. Frankenbat, who was kidnapping females for their blood to survive, tries to kill X Rider. Kamen Rider 1, 2, V3, and Riderman come to help X Rider battle Frankenbat and the forces of G.O.D.