The summer movie of Kamen Rider Decade, shown alongside Samurai Sentai Shinkenger The Movie: The Fateful War. In this movie, Tsukasa and his allies confront the malevolent group Dai-Shocker, while finding more about Tsukasa's past and family he left behind in his adventures, including his younger sister Sayo Kadoya
The movie contains the following tropes:
- Action Prologue: The movie opens with Decade facing off against Amazon in the Rider Battle tournament going back to the beginning.
- Ass-Kicking Pose: Made egregious during the big battle, wherein the Riders perform their poses during their battle with Shocker. Not before the battle nor after, but while fighting at the same time.
- Attack of the 50-Foot Whatever: Played straight with King Dark and J.
- Badass Army: We get to see not just the Riders in the series, but every main Rider from the original to Decade teamed up, and its every bit as awesome as it sounds!
- Badass Normal: Riderman, with Gackt specifically saying in interviews that he chose to play the character because, unlike other Riders who are superhuman, Joji is just an ordinary guy...with a Swiss-Army Weapon Arm Cannon, but still. He really gets to be the Badass Normal in the video for The Next Decade.
- Big Damn Heroes: All of the Riders reappear at the end to defeat the Dai-Shocker Army.
- Big Bad: Nobuhiko Tsukikage/AR Shadow Moon, as he manipulates both Tsukasa and Sayo into furthering his goals.
- Big Bad Wannabe: Tsukasa once he regains his memories as The Great Leader of Dai-Shocker starts out as the main villain only to be quickly deposed by Nobuhiko Tsukikage/Shadow Moon and his sister, Sayo Kadoya/High Priestess Bishium.
- Brainwashed and Crazy: Happens to poor Yuusuke when he is possessed by Tsukasa's sister.
- Breath Weapon: Decade Hibiki's Attack Ride: Onibi breathes purple fire which Decade uses to repel Amazon's biting attack.
- Brick Joke: When Daiki first appears, he reveals to have stolen Amazon's Gigi bracelet again. The end of the movie shows him giving it back.
- The Cameo: Toshiki Kashu appears as Shoichi Tsugami at the end of the movie along with Tetsuo Kurata, having previously played the AR Black and Black RX in the show, as the original Kotaro Minami (RX). Joji Yuki (Riderman) is played by GACKT.
- Catchphrase Interruptus: Den-O!Momotaros gets his "Ore, Sanjo!" catchphrase interrupted by a Dai-Shocker Mook. Hilarity Ensues.
- Co-Dragons: Ambassador Hell and Dr. Shinigami serve as this to Tsukasa and later Shadow Moon.
- Combined Energy Attack: The Final Kamen Attack Form Ride card.
- Continuity Nod: Yuusuke uses his precursor's trademark thumbs-up for the first time.
- Dark Reprise: Pay attention to the music that plays during The Reveal of the Great Leader.
- Defeat Equals Explosion: Exaggerated, with most all of Dai-Shocker's army falling in this manner, with special mention going to Shadow Moon going down with the Supervillain Lair and KingDark.
- Detachment Combat: Joji Yuki.
- Diabolus ex Nihilo: King Dark. No foreshadowing whatsoever.
- Disney Death: Eijiro Hikari, revealed to be Dr. Shinigami and destroyed by three Final Attack Rides, appears back to his normal self in the final scene of the movie. This ends up being a foreshadowing about the truth of his identity as Dr. Shinigami in Movie Wars 2010.
- Dressing as the Enemy: Daiki comes to the rescue of Natsumi (and Narutaki), having been hidden amongst the Dai-Shocker Combatmen pursuing them. He even transforms into Diend while still in his mook uniform.
- Early-Bird Cameo: Kamen Rider Double first appears here, taking on Shadow Moon. As with Decade's reduced episode count, it would only be a few weeks after this movie premiered that Decade would finish and Double would start, thus every summer movie from now on features the early-bird cameo of the new Rider coming to help out the current (soon to depart) rider.
- Fake Shemp: Most Heisei Riders just grunt or don't make any sounds at all. That's because, according to some extra material, like character guides and even the official site, they're supposed to be the original Riders, but there was only one returning actor out of the 8 previous Heisei Riders there (not including Kuuga, who was Onodera, not Godai).
- The same thing happens with Showa Riders, only one actor out of the 15 Showa Riders came back so the others were voiced by replacement voice actors, most notably Tetsu Inada as Rider 1 and Tomokazu Seki as Amazon.
- Foreshadowing: An inhumanly subtle piece of foreshadowing crops up when the Riders take their left at the end of the movie. Momotaros tells Tsukasa not to summon him again because he's super busy. He's referring to
his constant Wolverine Publicity as described on that pagethe new trio of Cho Den-O movies that are in production. Yet Momo's kind enough to betray his words just once and save Tsukasa's ass from Super Shocker's army in Movie Wars 2010. (Mind you, that movie was released before the Cho Den-O trilogy was even announced.)- Another one, but for Movie Wars 2010: the aforementioned Disney Death for Dr. Shinigami, and why it was Eijiro Hikari, of all people, who became Dr. Shinigami.
- Get A Hold Of Yourself Man: Yuki Joji in The Movie can do this WITH HIS GOOD ARM.
- Heel–Face Revolving Door: When Tsukasa regains his memories he resumes his role as the evil leader of Great Shocker...briefly, as he is usurped by Shadow Moon and his sister. Witnessing his friends leave him for betraying them, and getting an inspirational speech about being a Kamen Rider from Riderman put him back on the track to destroy Great Shocker once and for all.
- Homage: Tsukasa as the Great Leader of Dai-Shocker resembles Kamen Rider Spirits' Big Bad, Judo. Which makes sense as both are personifications of the Great Leader and have similar respective powers to transform into Riders of their era, Decade being able to transform into the nine main Heisei Kamen Riders (Kuuga to Kiva), while Judo is able to transform into the eight main Showa era Kamen Riders (Kamen Rider-1 to Super-1) as well as a golden version of ZX. Judo doesn't take Riderman's form as he is considered a secondary Rider as well as more of a Badass Normal than the others.
- How We Got Here: The movie opens in the midst of the Rider Battle before going back to show how it started.
- "I Know You're in There Somewhere" Fight: variant: Tsukasa tries to talk not to the brainwashed Ultimate Kuuga, but to his sister Sayo, who was controlling the latter.
- Image Song: The Next Decade, in GACKT's able hands, essentially becomes this for his version of Riderman. And it is, as noted,
awesome. - In Medias Res: The movie begins this way.
- Inn Between the Worlds: Hikari Studio.
- Legion of Doom: Dai-Shocker, an organization seeking to unite all of the evil organizations and monster races in the franchise's entire history together to defeat the Riders and conquer the multiverse.
- Mad Scientist: Joji Yuki, who in this reality made both the Decadriver and Diendriver.
- Make My Decade Grow: Diend does this when giant Kamen Rider J appears to oppose King Dark.
- To clarify, even J's colossal size isn't enough to face King Dark alone, so Diend uses Final Form Ride on Decade to give J Decade's power, which destroys King Dark.
- Man Bites Man: During the Rider Battle, Decade falls victim to Amazon's Jaguar Shock when Amazon bites his wrist, with Decade questioning if this against the rules.
- Mooks: Dai-Shocker has their Combatmen, who are identical to the iconic Shocker Combatmen only now they can function as rocket-propelled suicide bombers. In addition, Destron Combatmen, not too disimilar in appearance, appear amongst the Dai-Shocker army.
- Painful Transformation: Momotaros says that the Final Form Ride transformation hurts after Decade uses it. Faiz, Blade, and Kiva don't say anything themselves... probably because those three riders lack proper voice actors in the movie, and a gun, sword, and bow aren't the most talkative of objects.
- Scaled Up: Garagaranda and Ikadevil.
- Shout-Out: When all the Riders perform a Rider Kick, you can catch RX and Ryuki appear together in the same shot performing the kick - the two Rider series at the time that became localized in America.
- The All Riders Super Spinoff videos include several, such as Rider Fashion Check segment hosts Narutaki and Kenichi Suzumura comparing Double to Baron Ashura and Kikaider.
- Shout-Out Theme Naming: Nobuhiko Tsukikage (Shadow Moon): "Tsukikage" means "Moon Shadow".
- Slouch of Villainy: The Great Leader of Dai-Shocker and later Shadow Moon.
- Something about a Rose: a Running Gag in the spinoff videos about Tsukasa conjuring a rose.
- Stealth Pun: When Double appears to save Kuuga and Decade, which side of Double is Shadow Moon facing? BLACK.
- Superpowered Evil Side: Rising Ultimate Kuuga (initially).
- Supervillain Lair: Dai-Shocker is based in a castle in Tsukasa's world. It ends up getting destroyed (along with Shadow Moon) by 25 Rider Kicks.
- Taking the Bullet: As Decade struggles with Super-1, V3 takes the opportunity to take him down with the V3 Screw Kick, only for Yuusuke to push Tsukasa out of the way and take the kick himself, eliminating himself from the Rider tournament.
- There Is No Kill Like Overkill: How can we possibly justify 25 Rider Kicks against an already beat-down Shadow Moon who was handed his ass by Kamen Rider Double? Rule of Cool, that's how!
- Tomato in the Mirror: It is revealed that Decade is the leader of Great Shocker prior to the beginning of the show, but before he could begin his grand plan of conquest, he suffered from amnesia and then became a hero. Though he had no qualms about resuming his leadership and betraying his friends. At first.
- What Happened to the Mouse?
- Ouja and KickHopper are last seen fighting Diend's Gai, Raia and PunchHopper.
- Kamen Rider Ixanote is seen fighting in the Rider Battle but does not appear with the other Riders when they return for the Final Battle.
- The Worf Effect: The big battle has various examples of this trope, not that it's anything new.
- Rider 1 defeats Ganikomoru, a Crab/Bat monster that originally could match him, with two punches.
- Skyrider defeats the Queen Ant Lord from Agito, who originally only was defeated by Agito's ultimate form, with two attacks too. Although, to be fair, Skyrider's own "base" form is an ultimate form of sorts. However, in a later scene, Agito goes on to beat up the same Queen Ant Lord in his base form too.
- Kabuto single handily beat an Orphenoch, a mole Imagin, a Ganikomoru and a Shiomaneking (who originally needed to be defeated by Rider 1 and 2 fighting together) without even using Clock Up.
- Decade throws the Arch Orphenoch, Faiz's final enemy who originally matched 3 Riders at once, one with a Super Mode, to the ground with a single sword slash. He does the same to the Bat Fangire, Kiva's final enemy.
- Shadow Moon, easily the Big Bad of Kamen Rider BLACK, gets this both straight and inverted in this movie. He may have more potential than the god-like Creation King, but he somehow Decade and Rising Ultimate Kuuga at the same time without breaking a sweat. And then he was inexplicably whomped by Kamen Rider Double (who seems to be "suffering" from a major case of Advertising Power-Up) before receiving an epic Rider Kick from all other 26 Riders.
- Which was immediately followed by the rise of the giant King Dark, who effortlessly defeats the puny Riders by making a shitload of explosions and beats down Kamen Rider J in two punches. Then Diend decided to Make His Decade Grow and behold, King Dark becomes a nuke by eating two punches and a Rider Kick.
- Zerg Rush: The first act of Dai-Shocker's army upon the entrance of all Riders is to pelt them with a barrage of rocket-propelled Shocker Mooks.
- Which turns into a Chekhov's Gun of sorts. Three words. ALL. RIDER. KICK.
