Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals is the 2011 summer movie of Kamen Rider OOO, shown alongside Kaizoku Sentai Gokaiger the Movie: The Flying Ghost Ship. It also acts as an unofficial crossover with another Toei series, Abarenbo Shogun, as Ken Matsudaira reprises his role of "Tokuda Shinnosuke" to aid OOO.
Kamen Rider OOO Wonderful: The Shogun and the 21 Core Medals provides examples of the following tropes:
- Alchemy Is Magic: Gara can do a lot of crazy things with alchemy and Medals.
- Big Bad: Gara, one of the four Alchemists that created the Greeed for the First OOO.
- Continuity Snarl: While the film does provide some additional lore to the OOO story, there's really nowhere it can possibly fit story-wise in relation to the main series. All of the four main Greeed are shown as alive at the same time (something which is never the case in the main series after Episode 16) yet Ankh Lost is nowhere to be seen, Eiji has a full set of Core Medals (for most of the main series he only has them for Tajador and Putotyra forms), and he is unable to control Putotyra (in the main series, this happens the same episode where Mezool and Gamel are revived).
- Demonic Possession: Gara long ago lost his body after the King betrayed him and turned him into Cell medals along with his fellow alchemists, so he has to possess a human after being awoken in modern day.
- Dug Too Deep: The Kougami Foundation's archaeological dig unearths Gara's tomb in search of secrets he may have buried with him, accidentally unleashing the mad alchemist on the modern world.
- Early-Bird Cameo: Not only does OOO's successor, Kamen Rider Fourze, make his first appearance in this movie, but so does one of the supporting cast members of his series. In this case, Yuki Jojima.
- End of the World as We Know It: Causing this is Gara's ultimate goal so he can rebuild from the ashes In Their Own Image.
- Enemy Mine: the Greeed offer their Core Medals in order to help OOO fight Gara's One-Winged Angel.
- Evil Cannot Comprehend Good: Gara has no comprehension of positive desire, and is perplexed by Kougami's assertion desire is a creative force, not a destructive one. This ultimately ruins Gara's plan, as Eiji's overflowing selfless desire to save the people around him overloads his machine when Gara was expecting him to be a self centered monster like the original OOO and himself.
- Evil Versus Oblivion: The reason the Greeed oppose Gara and help OOO defeat him. That and he stole their Core Medals.
- Fastball Special: Eiji gets fascinated when Fourze demonstrates his powers, until Fourze decides to use the Magic Hand Switch to throw OOO at Gara.
- Godzilla Threshold:
- With no other options, Ankh lets Eiji use the Core Medal containing his consciousness to become OOO.
- The Greeed give Eiji their Cores to finish Gara off because they'll be destroyed too if he wins and stole their Core Medals to do it.
- In Their Own Image: Gara's plan is to destroy the world and remake it as he sees fit.
- It Was a Gift: OOO receives the medals for his BuraKaWani combo from Tokugawa Yoshimune.
- Mook Maker: Gara is capable of making entire armies by himself.
- Omnicidal Maniac: Gara wants to destroy the world so he can remake it In Their Own Image. Mezool compares him and Maki, but Maki quickly shoots down the assumption, as while he also wants to destroy the world, Gara wants to make a new one In Their Own Image afterwards while Maki wants the end to be the end.
- One-Winged Angel: Gara transforms into a a monster form after his initial plans are ruined. He transforms again after being defeated by OOO and Fourze, turning into a gigantic chimeric dragon-like monstrosity.
- Rasputinian Death: Gara takes the Finishing Moves of all of OOO's forms and being shot through the chest by Birth's Wave-Motion Gun to finally put down once and for all.
- Sealed Evil in a Can: Gara was sealed in Germany until Kougami accidentally unearthed his tomb and set him free.
- You Have Outlived Your Usefulness: Gara and his fellow Alchemists were subjected to this by the First OOO after completing the Greeed, turning them to Cell Medals. In Gara's case, he eventually revived.
