Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max

is a Japanese superhero crossover film between Kamen Rider OOO and Kamen Rider Fourze, and is the third Movie War. Serving to commemorate the franchise's fortieth anniversary, the film features supporting roles from Double and the first seven Kamen Riders, while Ryusei Sakuta makes an early-bird appearance as Kamen Rider Meteor ahead of his in-series debut. In the film, Eiji fights an evil Kamen Rider from the future while Gentaro befriends an extraterrestrial life-form who is being hunted by Foundation X. 
The catchphrase for the movie is and .
==Synopsis==
Eiji continues to embark on his journey to revive Ankh. However an evil Kamen Rider from 40 years into the future comes to disrupt the peace that he has been looking for. Meanwhile as Foundation X continues to be up to no good, their next target is the SOLU, an extraterrestrial life-form currently in the hands of Kamen Rider Fourze. 
==Continuity and Placement==
*Kamen Rider Fourze: The film takes place between Episodes 14 and 15.
*Kamen Rider OOO: The film takes place after the final episode.
*Kamen Rider W: The film takes place after Kamen Rider W Returns.
==Plot==
===Beginning: Fight! Legendary Seven Riders===
Meteorites fall from space all over the world, carrying a mysterious substance called SOLU.
As Kamen Riders 1, 2, V3, and Riderman battle Dustards and Kuzu Yummy in Europe, Kamen Riders X and Amazon fend off Masquerade Dopants in Chile. In the Middle East, holding off all three grunt types, Kamen Rider Stronger fails to stop Foundation X from retrieving the SOLU. In Japan, Foundation X agent Lem Kannagi reports his progress to Controller Kiima and proceeds in the next phase of his plan.
===OOO: Ankh's Resurrection, The Medal of the Future and The Leading of Hope===
One of meteorites causes a time hole to open in Japan as a bloodthirsty Kamen Rider from 40 years in the future emerges to fight this era's Kamen Riders. As Kousei Kougami informs Shintaro Goto of the event, giving him the Birth Driver while revealing to have been researching the means to recreate the Core Medals, Erika Satonaka informs Hina Izumi as they make their way to the airport to meet Eiji Hino. However, the ladies are attacked by Kuzu Yummy with Satonaka attempting to fight them off with the Birth Buster before Eiji arrives to save Hina in the nick of time. However, the mysterious Kamen Rider appears and knocks him out as Akira Date arrives and becomes Kamen Rider Birth·Proto Type to fight the enemy before Shintaro arrives and joins the fight as Kamen Rider Birth. The two Kamen Rider Births are easily overpowered with Date's Birth Driver damaged beyond repair.
However, "Eiji", revealed to be the Greeed Ankh, manages to rip out some of the Core Medals from inside the Kamen Rider as the real Eiji arrives, becoming Kamen Rider OOO and assumes the Random Combos Gatatoradol and Gatagorietar to weaken the enemy. But upon realizing something is off, Kamen Rider OOO hesitates as the enemy Kamen Rider escapes. Soon after, Ankh resumes his usual form, with Date and Shintaro hospitalized. The gang go to Cous Coussier where the Greeed refuses to explain the circumstance of his return while Eiji reveals that the Kamen Rider may not be acting of his free will due to the Core Medals inside him. But suddenly, several Kuzu Yummy burst into Cous Coussier and Eiji and Ankh hold the homunculi off while Hina and Chiyoko Shiraishi get everyone else to safety.
Once done, the two encounter the mysterious Kamen Rider. Though Ankh tells him it is a lost cause, Eiji refuses to not give up reaching the Kamen Rider and almost dies if it were not for the youth behind the Kamen Rider managing to restrain himself. As Eiji learns that his name is Michal Minato, the youth reveals himself to be the Kamen Rider 40 years in the future. However, his fear of water made him unable to use the Kamen Rider Aqua system he was granted and he instead uses a Core Medal system created by Kougami to become Kamen Rider Poseidon. Unfortunately, the Core Medals and remains of Kiyoto Maki emerge from a manifested black hole and enter Michal's body, giving Kamen Rider Poseidon a will of his own. Waiting Kamen Rider Poseidon out, Ankh attempts to rip the Core Medals out from the Kamen Rider before the entity leaves Michal's body and decides to fight the Kamen Riders in another time period. Kougami warns Eiji that he does not stand a chance, but he does not believe Kougami, and gives Michal a pair of boxers and tells him to do what he can today in order to see a new future.
Arriving at the location of the time hole just as Kamen Rider Poseidon is about to leave, as Ankh holds some Kuzu Yummy off, Eiji becomes Kamen Rider OOO to fight Kamen Rider Poseidon with Date, Shintaro, and Satonaka providing back up. Managing to face his phobia of water, Michal joins the fight as Kamen Rider Aqua to face Poseidon on the water before taking their battle on land. Assuming Tajadol Combo, Kamen Riders OOO and Aqua combine their signature attacks to destroy Kamen Rider Poseidon. After Kamen Rider Aqua leaves, Ankh is nowhere to be seen as Eiji reveals to Hina that Ankh actually came from the future, giving him hope that he will somehow revive their friend. However, the two are caught off guard by an explosion as Kannagi retrieves Poseidon's Core Medals.
===Futo: The Conspiracy Advances: Gallant! Kamen Rider Joker===
In Futo, Shotaro Hidari chases after a Foundation X convoy before managing to stop it. As Philip is preoccupied, Shotaro decides to become Kamen Rider Joker to destroy the Kamakiri and Kabuto Yummy. By then, Kannagi and his two aides arrive to a secret airport to enter their spacecraft the Exodus and install Kamen Rider Poseidon's Core Medals into a Driver before the Seven Riders arrive. After disposing of the interlopers, Kannagi states that only SOLU is needed. However, Kamen Rider Joker's interference causes the SOLU sample to leak into the sewer.
===Fourze: Nadeshiko, Descend===
At Amanogawa High School, they are hosting a cultural festival where Gentaro Kisaragi gets his fortune told by Mr. Chuta Ohsugi before the Kamen Rider Club, consisting of Gentaro and his friends space nerd Yuki Jojima, budding scientist Kengo Utahoshi, football team captain Shun Daimonji, cheerleader Miu Kazashiro, and goth Tomoko Nozama, begins its dedication to the past Kamen Riders. However, other than social butterfly JK being a no show, a mysterious girl falls from the sky as Gentaro saves her and they take her to the hospital. The Kamen Rider Club learns her name to be Nadeshiko Misaki from Subaruboshi High School before the group is attacked by Dustards.
Realizing that the Dustards are after her, Gentaro protects Nadeshiko from them before he transforms into Kamen Rider Fourze to fight just as Nadeshiko suddenly transforms into Kamen Rider Nadeshiko to help take out the Dustards. Soon after, the Virgo Zodiarts arrives to demand Nadeshiko Misaki from Kamen Rider Fourze as he assumes Elekstates to fight the Horoscopes. Deciding to change back into Basestates, Kamen Riders Fourze and Nadeshiko execute a Double Rider Rocket Punch to force the Virgo Zodiarts to fall back. After, the Kamen Rider Club learns that Gentaro is in love with Nadeshiko. Spiriting Gentaro off before she can answer Kengo's questions of where she obtained her Kamen Rider system from, Nadeshiko starts to become more vocal as she and Gentaro become closer before he takes her to the Rabbit Hatch. When Nadeshiko takes off her space helmet to kiss him, Gentaro realizes that she is not human.
Kengo reveals that she is one of the Seeds Of Life from the Universe, or "SOLU", an alien lifeform that mimics what it sees. Though Kengo explains that a SOLU is unable to be truly conscious, Gentaro refuses to accept it as he runs off. After Yuki manages to cheer him up, Gentaro refuses to let Nadeshiko go as he takes the container holding her from Foundation X posing as college scientists. Touched by Gentaro's feelings for her as she emerges from the container, Nadeshiko hugs him out of gratitude before Foundation X decides to take Nadeshiko by force as Kamen Rider Fourze chases after them on the Machine Massigler before forced to fight Katal as he mutates into the Mutamit Suddendath. After Shun uses the Powerdizer to help in the fight, Nadeshiko becomes Kamen Rider Nadeshiko to fight Foundation X's Masquerade Dopants before joining Kamen Rider Fourze in defeating Suddendath.
After Kamen Rider Fourze accepts that she is not real but he still loves her, Nadeshiko is captured by Kannagi who converts her into the SOLU Switch much to Gentaro's horror. After defeating Gentaro, Kannagi leaves the boy at Suddendath's mercy as the rest of the Kamen Rider Club holds the Mutamit off. Touched by his friends' actions, Gentaro transforms into Kamen Rider Fourze, again, and assumes Firestates before finding Nadeshiko's Rocket Switch Super-1, using it to become Kamen Rider Fourze Rocketstates to destroy Suddendath. Soon after, the Kamen Rider Club meets Eiji as he asks for Gentaro's help in defeating Foundation X.
===Movie War Mega Max: Gather! Warriors of Glory===
Meeting up with Shotaro and Philip, Gentaro introduces himself as he and Shotaro hit it off before he explains the nature of Foundation X with its agent Kannagi having betrayed the organization to take over the world. However, Kannagi sends his remaining aide Solaris to finish the Kamen Riders off by becoming the Unicorn Zodiarts while her followers become the Orion, Chameleon, and Hound Zodiarts. To return the favor to Eiji for before, Shotaro and Philip become Kamen Rider Double to hold off the Foundation X Zodiarts as Eiji and Gentaro assume their Kamen Rider forms to reach Kannagi.
Amused at the Kamen Riders' intent to stop him, Kannagi puts them at the mercy of an army of Dustards, Kuzu Yummy, and Masquerade Dopants. As Kamen Rider OOO assumes his various Combos to take out some of the grunts, Kamen Rider Fourze uses his Astroswitch combinations to wipe out the rest before the Exodus begins takeoff. As Kamen Rider OOO is overpowered by replicas of the Greeed and the Museum Dopants, Kamen Rider Fourze reveals he has found four Kamen Rider themed Astroswitches and three Kamen Rider themed Core Medals. When the two Riders use the items, they are revealed to be the Seven Legendary Kamen Riders and are able to return to their normal forms. They tell the two Kamen Riders to stop Kannagi while they hold off the monster replicas as Kamen Rider Aqua arrives to give Kamen Rider OOO a new set of Core Medals from the future.
Once inside the Exodus, the Kamen Riders face Kannagi as he becomes Super GingaOh and overpowers Kamen Riders Fourze and OOO before forcing the former outside. However, with the Kamen Rider Club's help, Kamen Rider Fourze uses the Powerdizer to reach the Exodus. As Kamen Riders Double CycloneJokerXtreme and Aqua, along with the seven Kamen Riders defeat the monster replicas, Kamen Rider OOO uses the Super Core Medals to become Kamen Rider OOO Super Tatoba Combo to fight the Super GingaOh on equal ground. Joined by Kamen Rider Fourze Rocketstates, he and Kamen Rider OOO double team the ex-Foundation X member before he uses the SOLU Switch's power on them. But with Nadeshiko giving him a power boost, Kamen Riders OOO and Fourze execute the Super Tatoba Kick and Rider Double Drill Kick to destroy the Super GingaOh by using their kicks to force him off of the Exodus just as the ship begins to explode, slamming into the ship's nose.
Now a being of pure energy, Nadeshiko departs the Earth for space as the Kamen Riders re-enter the atmosphere. As Eiji resumes his journey with his hope for Ankh's return stronger than ever, Gentaro encounters the real Nadeshiko Misaki just as he goes back to school however she walks past him without acknowledging him. Broken-hearted, Gentaro is welcomed back by his friends at Kamen Rider Club, making him feel better.
===Epilogue===
After the credits, the final few members of Kannagi's forces attempt to get away when they encounter a mysterious black and blue Kamen Rider who announces himself as Kamen Rider Meteor. He easily dispatches his foes before canceling his transformation into a young man who was unimpressed by his enemies, and notes that he should find his target at Amanogawa High School.
==Characters==
===Kamen Riders===
Kamen Rider Fourze 	Gentaro Kisaragi
Kamen Rider Nadeshiko 	Nadeshiko
Kamen Rider OOO 	Eiji Hino
Kamen Rider Birth 	Shintaro Goto
Kamen Rider Birth·Proto Type	Akira Date
Kamen Rider Aqua 	Michal Minato
Kamen Rider Joker 	Shotaro Hidari
Kamen Rider Double 	Philip & Shotaro Hidari
====Seven Legendary Kamen Riders====
Kamen Rider 1 	Takeshi Hongo
Kamen Rider 2 	Hayato Ichimonji
Kamen Rider V3 	Shiro Kazami
Riderman 	Joji Yuki
Kamen Rider X 	Keisuke Jin
Kamen Rider Amazon 	Daisuke Yamamoto
Kamen Rider Stronger	Shigeru Jo
===And Introducing Meteor===
Kamen Rider Meteor	Ryusei Sakuta
===Allies===
====OOO====
*Hina Izumi
*Chiyoko Shiraishi
=====Kougami Foundation=====
*Kousei Kougami
*Erika Satonaka
====Fourze====
=====Kamen Rider Club=====
*Kengo Utahoshi
*Yuki Jojima
*Miu Kazashiro
*JK
*Shun Daimonji
*Tomoko Nozama
=====Amanogawa High Faculty=====
*Chuta Ohsugi
===Villains===
====Kamen Riders====
Kamen Rider Poseidon	Poseidon/Michal Minato ► Poseidon
====Foundation X====
*Controller Kiima
Super GingaOh	Lem Kannagi
*Super Evolved Lifeform Mutamits
Suddendath 	Katal
Unicorn Zodiarts 	Solaris
Orion Zodiarts 	Unnamed male Foundation X member
Chameleon Zodiarts	Unnamed male Foundation X member
Hound Zodiarts 	Unnamed male Foundation X member
*Kuzu Yummies
*Stardust Ninja Dustards
*Dummy Inhumanoids (Dopant/Greeed replicas)
Terror Dopant 	Dummy Inhumanoid
Claydoll Dopant	Dummy Inhumanoid
R Nazca Dopant 	Dummy Inhumanoid
Smilodon Dopant	Dummy Inhumanoid
Uva 	Dummy Inhumanoid
Kazari 	Dummy Inhumanoid
Gamel 	Dummy Inhumanoid
Mezool 	Dummy Inhumanoid
*Yummy
**Kamakiri Yummy
**Kabuto Yummy
*Zodiarts
**Mitsuaki Gamou
Virgo Zodiarts	Kuniteru Emoto
Leo Zodiarts 	Kou Tatsugami
===Others===
*Jun Kazu (Flashback)
====NEVER====
*Katsumi Daido (Flashback)
*Reika Hanehara (Flashback)
*Gozo Domoto (Flashback)
*Ken Ashiwara (Flashback)
*Kyosui Izumi (Flashback)
==Cast==
;Beginning cast
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;Fourze cast
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**Mano also portrays the real towards the end of the film. 
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OOO cast
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Futo: The Conspiracy Advances cast
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===Suit Actors===
*Kamen Rider Fourze, Kamen Rider OOO, Kamen Rider Double, Kamen Rider Joker, Kamen Rider Stronger: 
*Ankh, Kamen Rider Birth, Kamen Rider Aqua, Kamen Rider Meteor: 
*Kamen Rider Poseidon: 
*Kamen Rider Nadeshiko: 
*Virgo Zodiarts: 
*Leo Zodiarts: 
*Suddendath: 
*Super GingaOh: 
==Form Changes and Collectibles Used==
===Astroswitches===
*Switches Used:
**Fourze
***Circle - Elek, Rocket, Fire, Rocket S-1, Chain Array, Magichand, Riderman
***Cross - Launcher, Chainsaw, 1
***Triangle - Gatling, Spike, Hopping, Drill, V3
***Square - Radar, Shield, Scissors, 2, Winch, Parachute
**States Used:
***Basestates, Elekstates, Firestates, Rocketstates
**Nadeshiko
***Circle - Rocket
***Square - N/A
===Core Medals===
*Medals Used:
**OOO
***Head - Taka, Kuwagata, Sai, Shachi, Lion, X, Super Taka
***Arms - Tora, Gorilla, Unagi, Kujaku, Kamakiri, Amazon, Super Tora
***Legs - Batta, Condor, Cheetah, Zou, Tako, Stronger, Super Batta
**Combos used:
***Tatoba Combo, Gatatoradol, Gatagorietar, Sagohzo Combo, Shauta Combo, Tajadol Combo, Gatakiriba Combo, Latorartar Combo, Super Tatoba Combo
**Poseidon
***Head - Same
***Arms - Kujira
***Legs - Ookamiuo
**Forms used:
***Poseidon
===Gaia Memories===
*Memory Used:
**Double
***Soul - Cyclone (once in Bickershield), Heat (once in Bickershield), Luna (once in Bickershield), Xtreme
***Body - Joker (once in Bickershield), Metal, Trigger, Xtreme
***Other - Prism (in Prismsword)
**Half Changes:
***CycloneJoker, HeatMetal, LunaTrigger, CycloneJokerXtreme
**Joker
***Joker
**Forms:
***Joker
==Music==
The film's theme song is "SAMURAI STRONG STYLE", performed by Show Ayanocozey and Marty Friedman. A special remix of "Anything Goes!" performed by its original artist Maki Ohguro alongside guest vocals from Shu Watanabe was featured in the film. 
The film also marks the debut performance of "Shout Out", the insert song to OOO's Shauta Combo, having never been used in OOO's broadcast run.
==Release==
*The film was released on DVD/Blu-Ray.
Movie War Megamax DVD.jpg|DVD Standard Edition
Movie War Megamax BluRay.jpg|Blu-Ray Standard Edition
Megamax DVD Collectors.jpg|DVD Collectors' Edition
Megamax BluRay Collectors.jpg|Blu-Ray Collector's Edition
==Errors==
*During the first close-up of the Medals inside Poseidon, several sets of Core Medals can be seen in quantities that are impossible due to some having been destroyed in the series (notably Kujaku, Sai & Tako in sets of three and even Batta appear in a set of four).
*When OOO inserts the Rider Medals into the OOO Driver, the belt announces the Medals.
*When Double inserts the Gaia Memories into the Prismbicker, the last Memory he inserts is Heat, but it says "Joker" instead.
==Notes==
*OOO's Core Medal Collection
**Red
***1x Taka Medal
***1x Kujaku Medal
***1x Condor Medal
**Green
***1x Kuwagata Medal
***1x Kamakiri Medal
***1x Batta Medal
**Yellow
***1x Lion Medal
***1x Tora Medal
***1x Cheetah Medal
**Grey
***1x Sai Medal
***1x Gorilla Medal
***1x Zou Medal
**Blue
***1x Shachi Medal
***1x Unagi Medal
***1x Tako Medal
*Like all Movie War films, Movie War Mega Max follows a multi-act structure. However unlike previous films, Mega Max features more than three due to the film celebrating the franchise's 40th anniversary.:
**Act 1: 
**Act 2: 
**Act 3: 
**Act 4: 
**Act 5: 
*As of this movie, Eiji possesses one copy of each original Core Medal, except for the Purple and Orange sets. However, Putotyra Combo itself appears in the film through a flashback scene.
*Scenes from Kamen Rider W Forever: A to Z/The Gaia Memories of Fate and Kamen Rider W Returns: Kamen Rider Eternal were recycled as flashbacks when Philip explains who Foundation X is to Eiji and Gentaro. 
*Eiji's "early-bird cameo" in Kamen Rider W Forever: A to Z/The Gaia Memories of Fate is acknowledged by Shotaro, who remembers Eiji's words of Riders helping each other out. 
*In the Director's cut, the countdown sequence on the Nadeshiko Driver was added.
*The obscured monsters from the future briefly shown in Michal Minato's flashbacks are actually Undead, namely the Tortoise Undead, Caucasus Undead, Paradoxa Undead, and a modified Trial F. Story-wise, it is unclear if this was just a case of suit reuse or actually meant to be the Undead unsealed again in the future.
*When Eiji is launched through the air after being shot by Poseiden, the stunt double playing him can be seen landing on his head. According to Seiji Takaiwa, the performer was rushed to the hospital after performing said stunt. 
*The movie was streamed on September 4, 2021 at Toei Tokusatsu World, most likely to commemorate both Fourze’s 10th anniversary and the upcoming Premium Bandai exclusive DX Nadeshiko Driver.
*This is final live-action appearance of Philip since Masaki Suda does not reprise his role after this movie.
==References==
==External links==
* at 
*Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max at Japanese Wikipedia
*Official website
*Website for Toei
Category:Movie War
Category:Crossovers
Category:Kamen Rider Fourze
Category:Kamen Rider OOO
Category:Kamen Rider Movies