Kamen Rider OOO Den O All Riders Lets Go Kamen Riders (Ozu Deno oru raida Rettsu go Kamen raida)
Eiji and Ankh team up with Kotarou and Momotaros as they travel back in time to stop the Imagin. But Ankh's desire to obtain Core Medals while in the past sets off a chain of events that alters the history of the Riders and the world.
December 30, 1998 in Saitama, Japan
4 May 1978, Kochi, Japan
14 February 1927, Tokyo, Japan
23 November 1979, Nagasaki, Nagasaki, Japan
7 December 1991, Tokyo, Japan
21 February 1993, Minoh, Japan
12 August 1968, Osaka, Japan
13 December 1969, Amagasaki, Hyogo, Japan

