* ActingForTwo:
** Creator/KoukiUchiyama voices both Roxas and Neku in the Japanese version.
** In all languages, Sora and Vanitas share a voice actor.
** Roxas and Ventus also share a voice actor in both languages.
* FanNickname
** Sora and Riku's dual attack during Nightmare's End/Mirage Split has earned the name the Ball Buster Keyblade.
** [[spoiler:The Xehaborg]] and [[spoiler:Borganization XIII]] for [[spoiler:the real Organization XIII]] after they attempt to [[spoiler:turn Sora into a Xehanort vessel]].
*** [[spoiler:Organortzation XIII]] and [[spoiler:Organization XIII-2]] seem to be picking up steam, especially the latter.
*** [[spoiler:Braignort and Isanort]] to mirror Terranort.
*** Some use [[spoiler: Soranort]] with the same aforementioned parallel when discussing [[spoiler: Sora falling to darkness and becoming a Vessel.]]
** Portmanteau names such as Axelea and Xigbraig have been popping up as of this game, mostly to signify you're talking about the character in general, rather than a point of time in their life.
** KingdomHearts: {{Film/Inception}} [[spoiler:Riku's inside Sora's dreams in the Dream World, then goes further into his own dreams to defeat his personal foe near the end of the game.]]
** "Norted" has become the term for [[spoiler:characters becoming a Vessel of Darkness whether it be canon or not]]. Also, "Nortification" for the process into becoming one.
** In line with BHK and OBM for Roxas and Xehanort, there's YMX for the younger Xehanort introduced.
* IKnewIt:
** Who ''hasn't'' suspected [[Disney/TheHunchbackOfNotreDame Notre Dame]] or [[VideoGame/TheWorldEndsWithYou Neku Sakuraba]] showing up sooner or later?
** The idea that the game is taking place in a dream, with new, dream-based enemies.
** When the ''Disney/{{Fantasia}}'' world was confirmed, people suspected that [[BestBossEver Chernabog]] would be making an appearance. And they were right.
** Fans knew a world for ''Film/TronLegacy'' was coming due to the popularity of the Space Paranoids level as well as [[GermansLoveDavidHasselhoff the movie's popularity in Japan.]]
** The "symbolicness" of the cover, [[spoiler: a lot of fans expected Riku to be the true hero of the story.]]
** We also knew that ''Disney/{{Pinocchio}}'' would get a world sooner or later. Heck, we knew it in ''[[WhatCouldHaveBeen 358/2 Days]]''.
** Some fans have always insisted that [[spoiler: Nobodies do actually have hearts]], despite the games claiming the exact opposite. In this game, Xemnas [[spoiler: explains that they're half right. Nobodies are indeed created with no hearts, but develop replacements for their hearts over time]].
** Some fans have speculated that the depths of Sora's heart looks like the Destiny Islands. They were right, as when [[spoiler: Riku dives into Sora's heart to wake him up, he finds Xion, Roxas, and Ventus on a perfect replica of the island Sora, Riku, and Kairi visited when they were younger.]]
* MilestoneCelebration: ''Dream Drop Distance'' is a large part of the series' 10th anniversary celebrations; the logo for it is emblazoned in the top right corner of the games cover, and it also accompanies ''358/2 Days'' and ''Re:coded'' in a special anniversary box set. Additionally, a limited edition 3DS console with a unique ''3D''-inspired design is being released.
* NoExportForYou: Despite ''Nintendo Of Europe'' getting the rights to publish the game in Europe, due to Creator/SquareEnix's rather unfortunate decision to [[OfferVoidInNebraska not localize the written text for Italy and Spain]], ''Nintendo Ibérica'', the latter's subsidiary of NOE, [[http://eu.square-enix.com/en/blog/product-information-kingdom-hearts-3d-updated has now decided not to publish the game anymore.]] This means that, despite the Nintendo3DS' RegionCoding no longer being an issue due to the PAL version of the game still getting released in other European countries, Spanish fans will have to import the game anyway (unless they find said PAL version of the game at "select retailers").
* TheOtherDarrin:
** Rhyme in both versions. In Japanese, she's voiced by Creator/AyanaTaketatsu instead of Creator/HitomiNabatame. In English, Ashley Rose replaces Creator/KateHiggins.
** Ben Diskin takes over [[spoiler:Young Xehanort]] from David Gallagher, who voiced him in ''VideoGame/KingdomHeartsBirthBySleep''.
** None of the ''Hunchback of Notre Dame'' actors reprise their roles except for Jason Alexander (Hugo) and Charles Kimbrough (Victor), though two of them [[AuthorExistenceFailure are dead]].
** None of the movie actors return to voice the characters, Creator/FredTatasciore reprises his role as Kevin and CLU from the ''VideoGame/TronEvolution'' game and ''WesternAnimation/TronUprising''.
** Hayden Panettiere has replaced Alyson Stoner as Xion.
* TalkingToHimself: Sora and [[spoiler:Vanitas]] have a cutscene together, sort of.
* WhatCouldHaveBeen: There was originally going to be greater differences between Sora and Riku's stories. Sora was planned to return to [[Film/{{Tron}} Space Paranoids]], with only Riku visiting [[Film/TronLegacy the Grid]] (there are elements of TheArtifact here; note that Sora's plot is concerned with reconnecting with Tron, while Riku's is the one with the condensed ''Tron: Legacy'' plot). Additionally, Sora's storyline in the Symphony of Sorcery would've been ''Disney/{{Fantasia}}''-based, while Riku's would've been ''Fantasia 2000''-based. A [[https://www.youtube.com/watch?v=rJDe41jQdNc textured-less ship]] that resembles the ship in ''Disney/TreasurePlanet'' exists in the game's code implying that a world based on ''Treasure Planet'' was intended to appear.
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