History YMMV / KamenRiderDecade

** [[spoiler: Tsukasa being this universe's incarnation of The Great Leader of Dai-Shocker who lost his memories while traveling the worlds.]] This idea could have easily been the center plot of the series itself and could have been explored how even such an iconic villain in the franchise could have been redeemed, especially since he's the anniversary Rider of Kamen Rider itself. [[spoiler: Tsukasa's past and how he even lost his memories are barely even touched upon in the movie.]]

* MemeticTroll: Daiki Katou/Kamen Rider Diend, he will give out vague information about Tsukasa to him, will switch sides midway because he’s bored, will steal something important and sometimes give it back at the last second, and will turn invisible. It helps that unlike Tsukasa and Yusuke, he was meant to be seen as annoying, making his ability to mess with them look even better.

* TheScrappy: Tsukasa, for being a jerk who seems to solve everything and having his MagnificentBastard tendencies repeated over and over again in movies or taking the spotlight away from other Riders, gets this treatment.

* TheScrappy: Tsukasa, for being a {{Jerk S|ue}}tu who seems to solve everything and having his MagnificentBastard tendencies repeated over and over again in movies or taking the spotlight away from other Riders, gets this treatment.

** [[TheCaligula Otoya Kurenai]]/[[AbsoluteXenophobe Kamen Rider Dark Kiva]] is [[Series/KamenRiderKiva King]]'s substitute in the World of Negatives, possessing not only all of his FantasticRacism, but also a charismatic personality to hide the fact that he is a cold-hearted, scheming dictator. Having created a law that qualifies humans as less than Riders, Otoya exterminated more than half of humanity in a genocide, and sends his minions to wipe out survivor camps. He also beats a Pseudo-Rider for defying him, commenting on how he must obey him for being a true Rider. Seeking to make Tsukasa his successor, Otoya tries to [[TheCorrupter corrupt him]] into abandoning his journey and accepting the nature of his hateful world.

** [[FaceOfAnAngelMindOfADemon Momose]]/[[TeensAreMonsters Tiger Orphnoch]], the prideful leader of the new Lucky Clover in the [[Series/KamenRider555 World of Faiz]], is introduced as a member of a gang bullies studying at Smart Brain High School who is quickly revealed to be a budding psychopath. Having orchestrated a series of attacks targeting other students, Momose tries to kill Takumi's best friend in front of him and orders his comrades to indiscriminately kill numerous students while he could watch and mock the victims. Not satisfied with the initial massacre, Momose gathers the survivors in a circle for them to be executed one by one, informing them that if they are lucky, they could be turned into Orphnoch.

* CompleteMonster: [[TheCaligula Otoya Kurenai]]/[[AbsoluteXenophobe Kamen Rider Dark Kiva]] is [[Series/KamenRiderKiva King]]'s substitute in the World of Negatives, possessing not only all of his FantasticRacism, but also a charismatic personality to hide the fact that he is a cold-hearted, scheming dictator. Having created a law that qualifies humans as less than Riders, Otoya exterminated more than half of humanity in a genocide, and sends his minions to wipe out survivor camps. He also beats a Pseudo-Rider for defying him, commenting on how he must obey him for being a true Rider. Seeking to make Tsukasa his successor, Otoya tries to [[TheCorrupter corrupt him]] into abandoning his journey and accepting the nature of his hateful world.

* CompleteMonster: [[TheCaligula Otoya Kurenai]]/[[AbsoluteXenophobe Kamen Rider Dark Kiva]] is [[Series/KamenRiderKiva King]]'s substitute in the World of Negatives, possessing not only all of his FantasticRacism, but also a charismatic personality to hide the fact that he is a cold-hearted, scheming dictator. Having created a law that qualifies humans as less than Riders, Otoya exterminated more than half of humanity in a genocide, and sends his minions to wipe out survivor camps. He also beats a Pseudo-Rider for defying him, commenting on how he must obey him for being a true Rider. Seeking to make Tsukasa his successor, Otoya tries to [[TheCorrupter corrupt him ]]into abandoning his journey and accepting the nature of his hateful world.

* CompleteMonster: [[TheCaligula Otoya Kurenai]]/[[AbsoluteXenophobe Kamen Rider Dark Kiva]] is [[Series/KamenRiderKiva King]]'s substitute in the World of Negatives, possessing not only all of his FantasticRacism, but also a charismatic personality to hide the fact that he is a cold-hearted, scheming dictator. Having created a law that qualifies humans as less than Riders, Otoya [[KillAllHumans exterminated more than half of humanity in a genocide]], and sends his minions to wipe out survivor camps. He also beats a Pseudo-Rider for defying him, commenting on how he must obey him for being a true Rider. Seeking to make Tsukasa his successor, Otoya tries to [[TheCorrupter corrupt him ]]into abandoning his journey and accepting the nature of his hateful world.

* HilariousInHindsight: While this show features the first ''Franchise/SuperSentai''/''Franchise/KamenRider'' crossover, ''Series/MightyMorphinPowerRangers'' and ''MaskedRider'' crossed over first. At the end of the ''Series/SamuraiSentaiShinkenger'' crossover, the world of ''Series/KamenRiderBlackRX'', the show ''Masked Rider'' used footage from, is revealed to be the next world.

* BrokenBase: On one side, people who like ''Decade'' enjoy it because they feel it's a celebration of what makes ''Franchise/KamenRider'' great while having an interesting MythArc story. On the other side, people who dislike it feel that the overuse of {{Suspiciously Similar Substitute}}s ruins what could have been a great ReunionShow and that [[TheWorfEffect every returning character was weakened to make Decade look stronger]][[note]]to be fair, it would've been impossible to get all the actors who portrayed the original riders back - even if Toei had been able to afford re-hiring Takeru Satoh and Hiro Mizushima to play Ryotaro Nogami and Souji Tendou, they still wouldn't have been able to use Yusuke Godai, mainly due to the fact that his actor, Joe Odagiri, hasn't expressed an interest in reprising the role[[/note]]. However, both sides generally agree that the show should have had more than two episodes per plot arc.

* ActorAllusion: In the S.I.C. Hero Saga story ''World of OOO'', when the heroes fight [[Series/KamenRider Golden Wolf Man]], Yusuke mentions that he recently saw a "popular superhero show" where [[Series/{{GARO}} a man in golden wolf armor fought a villain who looked a lot like Tsukasa]].

** About ''Gokaiger'' again, though more subtly: the first ''Shinkenger'' episode of ''Decade'' was one of the very few times in ''Decade'' where the Kamen Rides (both Diend's and Decade's) had a thematic link to the episode's theme (''Shinkenger'', ''Ryuki'' and ''Den-O'' were all written by YasukoKobayashi); ''Gokaiger'' turned out to be far more liberal in its usage of such thematic transformations into past heroes in episodes with alumni guest stars.

* BrokenBase: On one side, people who like ''Decade'' enjoy it because they feel it's a celebration of what makes ''Franchise/KamenRider'' great while having an interesting MythArc story. On the other side, people who dislike it feel that the overuse of {{Suspiciously Similar Substitute}}s ruins what could have been a great ReunionShow and that [[TheWorfEffect every returning character was weakened to make Decade look stronger]]. However, both sides generally agree that the show should have had more than two episodes per plot arc.

* SugarWiki/AwesomeMusic: [[https://www.youtube.com/watch?v=ofkJLPdB4os Episode 19]].

** And then the ''Final Chapter'' movie has [[spoiler:Natsumi becoming Kamen Rider Kivara and they even give the original quasi-female Rider sidekick [[Series/KamenRiderStronger Tackle]] a decent sized sub plot as way of homage.]]

** The appearance of [[spoiler:King Dark]] near the end of ''All-Riders'' is [[LateToThePunchline funny in retrospect]], since it means [[spoiler:'''two''' personifications of the Great Leader [[note]]the second one, obviously, was Decade[[/note]] are duking it out.]]

** In ''Series/KamenRiderRyuki'', Shuichi Kitaoka[=/=]Zolda was a lawyer. In the World of Ryuki, they're ''all lawyers''. Zolda earns an upgrade to public prosecutor, and is apparently a force to be reconned with.

** '''[[MomentOfAwesome HIHIHIHIBIKI]]'''

* TearJerker: the deaths of [[spoiler:Kuuga!Yashiro and AU!Hibiki.]] Some could probably counted as well.

* TheyWastedAPerfectlyGoodPlot: The whole "Orphenochs can't go to school" aspect was just mentioned by one or two lines and that is it. Even after [[spoiler: Faiz is revealed to be one,]] it doesn't get mentioned again.

** Let's see, we've got a character who summons heroes from other worlds via inserting their card into a gun, and firing them out of said weapon. Are we talking about Kamen Rider Diend or [[VideoGame/FireEmblemHeroes Kiran?]]

* Let's see, we've got a character who summons heroes from other worlds via inserting their card into a gun, and firing them out of said weapon. Are we talking about Kamen Rider Diend or [[VideoGame/FireEmblemHeroes Kiran?]]

* SeinfeldIsUnfunny: ''Decade'' is well-seated with the fans initially but after subsequent crossover movies keep portraying the [[SuperDickery titular rider leading the villainous army to kill all Riders and/or destroying the world]] and yet he is always right anyway [[AssPull for the sake of plot twist]], the series plummeted to slightly above ''[[KamenRiderWizard Wizard]]'' in terms of popularity. [[TheScrappy And considering fans' reception about the latter show...]]

*** As well take a [[http://www.youtube.com/watch?v=0Ko0juwKKSY Journey Through the Decade]].

* BestKnownForTheFanservice: Most of Natsumi's fanart is her outfit from when she was possessed by Urataros. [[note]] Keep in mind that Natsumi's scene in this outfit lasted for only a few ''seconds''[[//note]].

** The Kabuto World story ends with Kivaara facing off with a Worm mimicking Kivaara, for no reason other than to have a Worm mimicking Kivaara. It gets weirder if you're familiar with the concept from [[Series/KamenRiderKabuto the original series]]. [[note]]Typically, ShapeshifterBaggage is only loosely employed so that Worms, being human-sized, can only impersonate other humans - but Kivaara is ''the size of a baseball.''[[//note]]