* ActorAllusion: In Faiz World, Tsukasa shows off how incredible he is at tennis in a few rounds against Lucky Clover. After all, Masahiro Inoue (Tsukasa's actor) used to be Keigo Atobe [[TheMusical in the musical production of]] ''ThePrinceOfTennis''.
** The roses in Ibuki's transformation may be a reference to the fact that Jouji Shibue's first big role was Tuxedo Kamen in ''Series/PrettyGuardianSailorMoon''.
* BeamMeUpScotty: The now-legendary ONORE, DICKEIDO! was only said in the actual show once, with Narutaki generally saying it in the Net Movies. However, it's now considered Narutaki's catchphrase by the fans.
* EnforcedMethodActing: Might be something different but both Ryuga and [[spoiler:the Original]] Blade have trouble sliding the cards into their belt buckles.
** To be fair, you can notice the same sort of problems if you go back and watch Series/KamenRiderBlade.
** This actually gets a nod in the shorts made for ''All Riders vs Daishocker'', where Tsukasa is teaching a man how to transform into Ryuki; he has trouble slotting the Advent Deck into the V-Buckle, so Tsukasa tells him "[[MediumAwareness Don't worry, let the cut take care of it.]]" This is followed by another attempt, with a SmashCut interrupting the motion and showing the deck being slid perfectly into place.
* ExecutiveMeddling: Movie Wars 2010 was initially announced as a Double feature with a Decade movie called Decade vs All Riders and a W movie called Episode Zero. Eventually, the entire project was reformulated, turning it into a Triple feature and heavily changing the overall content of the Decade story which lost the All Riders label and ended up very different from the original preview, even having to basically ignore the some twists of the show's cliff hanger ending due to the shorter running time.
** Put it this way: after the final episode of the TV series ended on a {{Cliff Hanger}}, they immediately showed a preview for Movie Wars 2010, billing it as "the final episode of Decade's story". ''Not one scene in that preview was in the final movie''. They ''did'' include the scenes in the director's cut, but it was just the same scenes from the preview.
** Several parts of Decade's story, most notably Tackle, only were kept because they had already made props for them before the change of direction of the production. Tackle was initially supposed to search for Stronger after he disappeared fighting Decade, and that story even got published in some of the earlier previews, but her storyline was completely changed after it was decided that Decade's movie wouldn't feature All Riders anymore, in spite of a new Tackle costume already have been made.
** There's also Kenzaki's actor, who was contracted for the movie, but ended up just doing a few generic yells as Blade in a very quick scene, making most people not even notice that it was the original actor voicing the Blade that fought against Decade.
* [[FanNickname Detractor Nickname]]: Decade is sometimes spelled as "Dickeido," because (1) [[GratuitousEnglish that's how his name is pronounced in the show]], and (2) [[{{Jerkass}} he's kind of a dick]].
* HeyItsThatGuy[=/=][[HeyItsThatVoice Voice!]]: There are many of them.
** Yusuke and Kazuma are both played by actors who appeared in ''Fuuma no Kojirou''.
** Yusuke's actor is also the YouSuck detective in the ''Den-O x Kiva'' crossover movie.
*** He was also part of the ''PrinceOfTennis'' musicals, too!
*** Come to that, so was the actor who played the AR version of ''Kabuto'''s Kagami[=/=]Gatack.
*** There are actually no less than eight actors in Decade who were part of those musicals, including Masahiro Inoue/Tsukasa himself.
** Ai and Toko Yashiro are both played by Hiroko Sato, who is also Kaori in ''MadanSenkiRyukendo''. And she's hot as a bikini idol, too.
** One of Kazuma's [[strike:harem]] assistants is Rumi Hiiragi, who voiced Chihiro in ''SpiritedAway''.
** Natsumi's female chum from high school had voiced Vanilla in ''SugarSugarRune''.
** Kivahla's voice actress is Creator/MiyukiSawashiro.
** The Tiger Orphenoch is played by Beetle Sazer from ''[[Series/ChouSeiShinSeries Chousei Kantai Sazer-X]]''. Plus some bonus RetroactiveRecognition, now that the actor plays Ankh on ''Series/KamenRiderOOO''.
** Shoichi is played by the same guy as Kamen Rider Kirameki from the ''Series/KamenRiderHibiki'' [[TheMovie movie]].
*** And in the ''All Riders VS Dai-Shocker'' movie, it turns out that that's not the AU Agito at the end, since it's Toshiki Kashuu. (ie: the original [[Series/KamenRiderAgito Agito]]).
** Soji's little sister, Mayu, is played by the same actress as the true identity of [[spoiler:Mr. Voice]] in ''Series/GoGoSentaiBoukenger''.
** Somewhat differently than usual, but seeing Kawara Kazuhisa playing Guy/Apollo Geist is extremely jarring. His most high-profile role was as a police detective in the J-police drama "Aibo", although he was apparently in an episode of Ryuki as well.
** Narutaki was in the LiveActionAdaptation of ''Manga/DeathNote'' as one of the police investigators assisting L.
** The voice actor for Amazon in TheMovie is Creator/TomokazuSeki; no wonder that Amazon is more HotBlooded in this incarnation.
** Ryutaros' VA Creator/KenichiSuzumura plays ''Series/KamenRiderX'' in the movie and Narutaki's co-host in the Net Spin-Off videos.
** Creator/FumihikoTachiki is the voice of the Kuuga world BigBad N-Gamio-Zeda; strangely enough Tachiki was also the narrator for Series/KamenRiderKuuga.
** [[Series/KamenRiderKiva AR Wataru]] is played by the actor who played Jan when he turned into a little boy in ''Series/JukenSentaiGekiranger''.
** In ''The Last Story'', the new Bee Woman is [[Series/EngineSentaiGoOnger Kegalesia.]]
** The Scissors in Ryuki World is played by Yasunori Matsutani, who played Etemon in the Japanese version of ''Anime/DigimonAdventure''.
* NamesTheSame: A girl called Natsumi with violent tendencies? [[KeroroGunsou Seen it.]] [[HigurashiNoNakuKoroNi Twice.]]
** As we noted above in this page, Tsukasa is a Cloudcuckoolander. Applicable to both Kadoya and [[LuckyStar Hiiragi]].
** Unlike other characters who were altered in the new reinterpretations of the Nine Worlds, there is a Reiko Momoi in the Ryuki World. And there also ''was'' a Reiko Momoi in Series/KamenRiderRyuki. While Decade!Reiko was DaChief [[spoiler:and StuffedInTheFridge to kickstart the plot]], Ryuki!Reiko was the IntrepidReporter [[spoiler:and the worst thing to hit her was pinkeye.]]
** Takumi Ogami shares a family name with [[Series/HyakujuuSentaiGaoranger GaoSilver]], who also had a "wolf" theme to his character.
** Averted with [[spoiler:Hikari Eijirou and TheOtherDarrin Dr. Shinigami - thanks to a [[Series/KamenRiderDouble Dopant Memory]], they're the same guy.]]
* PromotedFanboy: Masahiro Inoue, the actor for Decade, is a huge fan of ''Kamen Rider'', even as an adult. When the Black/RX episodes aired, he made one post on his blog consisting of little more than excited babble about Apollo Geist and "I'm Joe the Haze!". Adding to this, when the finale aired, he expressed relief that he can "enjoy ''Kamen Rider'' objectively again". Not to mention his buying a swimsuit with the Decade colors, or various other eccentricities... (Rider Kick on a trampoline?)
** On the same note, Ryota Murai, Yusuke Onodera/Kamen Rider Kuuga, was a huge ''Kuuga'' fan as a child. You can imagine his delight at getting to '''be''' Kuuga himself as an adult. Combine this with Inoue's fanboying, and you get some very interesting [[http://ameblo.jp/masahiro-inoue/entry-10319891640.html blog]] [[http://ameblo.jp/masahiro-inoue/entry-10320631644.html posts]].
*** When ''Super Hero Wars: Kamen Rider vs. Super Sentai'' was announced, Inoue made a [[http://ameblo.jp/masahiro-inoue/entry-11098890553.html blog post]] where he talks about how he missed being a Rider and how much he looks forward to getting back to action.
* PropRecycling: Raydragoons from Series/KamenRiderRyuki function as {{Mooks}} in Nega World; in an amusing crossover with RealLifeWritesThePlot, Detail of Heroes explains that this is entirely because the makers of ''Series/KamenRiderDragonKnight'' ordered Raydragoon costumes in bulk to use as the Mook in their series.
** You can catch the motorcycle used as Machine Decader in ''Series/KamenRiderKiva.'', ep. 32 and 35 (used by Nobori Taiga[=/=]Saga.)
* RealitySubtext: Try watching the ending with the knowledge that [[spoiler:Joe Odagiri, the actor of the original Yusuke/Kuuga, was the only ''Kamen Rider'' lead actor to have explicitly expressed an OldShame towards the franchise.]]
* TheRedStapler: Tsukasa's [[strike:pink]] magenta [[http://www.holgablog.com/2009/10/23/a-pink-blackbird-fly/ Blackbird Fly]] is one of these.
* ScrewedByTheNetwork: In Kabuto's World, the Worm Tsukasa was probably meant to foreshadow how in ''The Last Story'', [[spoiler: Decade would fight against Dark Decade. Unfortunately, it ended being [[DemotedToExtra Demoted To]] BigLippedAlligatorMoment instead, but it's the thought that counts]].
* WhatCouldHaveBeen: The producers said they wanted to make a modernized Riderman costume for Gackt to wear in ''All Riders'', a la the suits for Riders 1, 2, and V3 seen in ''Film/KamenRiderTheFirst'' and ''Film/KamenRiderTheNext,'' but weren't able to complete it in time for filming, which is why he appears only as an untransformed Joji Yuki while Riderman is portrayed by a stuntman during the ending carnage.
* WordOfGay: Apparently Kaito, based on this quote. "Loves Tsukasa. Like Boys Love."
** [[{{Troll}} Considering who this is, though...]]
*** It's not exactly out of line with his behavior towards Tsukasa through the series, and his latest appearance in Film/KamenRiderXSuperSentaiSuperHeroTaisen goes straight into {{Yandere}} territory.