Movie War Mega Max featured the first seven Kamen Riders (Kamen Rider 1, 2, V3, Riderman, X, Amazon, and Stronger) to commemorate the franchise's 40th anniversary. Trailers for the film shown during airings of Fourze also showed the return of Kamen Rider Double as well as a new form for Kamen Rider OOO. Unlike previous Movie War films, where they were divided into 3 segments, Movie War Mega Max is divided into 5 parts. Like previous Movie War films the secondary Kamen Rider of Kamen Rider Fourze, Kamen Rider Meteor, made his debut in the film.
Leading an expedition in Thuringia, Germany, Kousei Kougami was unearthing the resting place of one of the First OOO's alchemist to obtain legendary Lost Medals. The Shogun and the 21 Core Medals features a trip to the past where the cast of Kamen Rider OOO meets up with Tokugawa Yoshimune (portrayed by Ken Matsudaira) to battle the powerful alchemist Gara (portrayed by Miki Sakai) while learning the origins of the Core Medals. The film also introduced Kamen Rider OOO's Burakawani Combo
Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core is a 2010 film in the Kamen Rider Series, featuring the casts and characters of Kamen Rider W and Kamen Rider OOO. Originally announced in a teaser at the end of the film Kamen Rider W Forever: A to Z/The Gaia Memories of Fate, film was released in Japan on December 18, 2010. The catchphrase for the movie is "Kamen Riders, to the inner core of the Earth." Actor Taro Yamamoto guest stars in the film as the former partner of Sokichi Narumi, Koji Kikkawa reprising his role as the character. Both Kikkawa and Maki Ohguro are tied to a theme song (and music video) for the film, recording the song "HEART∞BREAKER" under the band name "DaiKichi". This movie is didn't fit the continuity while W take place after the final episode until Eiji used Tajadol Combo again. The character of Kamen Rider Birth made its debut in the films
The course of history is accidentally changed when Ankh leaves behind a Medal in the past after Kamen Rider OOO helps Den-O and New Den-O chase a Mole Imagin all the way back to November 11, 1971. When they return to the present time on April 1, 2011, they discover that Shocker succeeded in conquering the world and now Kamen Rider 1 and 2 are Shocker's top agents. In order to defeat Shocker, Kamen Rider OOO and the Den-Liner gang must travel back in time to gather other Kamen Riders to defeat Shocker and restore the proper timeline.