* AluminumChristmasTrees: "Sea Salt Ice Cream". A lot of people in North America and Europe thought that it wouldn't possibly exist because the salt would lower the freezing point of the water, preventing the ice cream from solidifying. Or just that nobody would think salty ice cream would be good anyway. Actually, it's sold at Tokyo Disneysea - and has been before Kingdom Hearts 2.
** AuthorAppeal: The reason it was worked in. It was also worked in because he imagined what the characters would eat over summer vacation.
* ExecutiveMeddling: According to Creator/TetsuyaNomura, he had originally planned on only including characters from ''Final Fantasy'' titles he personally designed. He eventually caved in to the urging of the staff, which is how [[VideoGame/FinalFantasyVI Setzer]] and [[VideoGame/FinalFantasyIX Vivi]] were added to the game. The gamble perhaps didn't pay off as well as they would've hoped; Setzer, in particular, was criticized for heavily deviating from his original incarnation's personality, moreso than was par for the course in ''KH''.
* FanNickname: Before his name was revealed, fans took to calling Roxas the Blond-Haired Kid (BHK).
** To those trying to guess the plot of the sequel from the trailer, Roxas was often called Dual-Wielding Unknown, while Riku was called Blindfolded Unknown.
*** Oddly enough the trailer isn't even part of the game; it's a flashback that takes place right before it. It is, however, [[spoiler: the final battle in Days.]]
** Don't forget "Orgy XIII".
** Fans also commonly refer to Xemnas as "Mansex" - an anagram of his name.
** Pete is given the nickname [[HellFireCommentaries Captain Ass-Zipper]], due to, well, [[ExactlyWhatItSaysOnTheTin look!]]
** ChipCheezum and friends popularized "Dogstreet" for Pence, named after the writing on his shirt.
* FandomNod: In addition to all the Disney/Final Fantasy references, there is a literal fandom nod during Cloud and Leon's snark-fest in the sequel. As they do their BackToBackBadasses moment, it echoes the rivalry between fans of their respective games.
* HeyItsThatVoice: Once you hear [[Creator/CamClarke Adult Simba]] talk, you're never going to get [[VideoGame/MetalGearSolid Liquid]] [[MetalGearSolid2 out of your mind...]]
** As soon as you hear Pence, [[FostersHomeForImaginaryFriends no doubt about it, but you'll start thinking of a sweet little eight-year-old boy with a jerk of an imaginary friend]].
** Creator/CoreyBurton provided [[Film/{{Tron}} Sark's]] voice because Creator/DavidWarner, his original actor, was unavailable at the time. Burton previously voiced Shockwave in ''{{Transformers}}'', whose voice was inspired by Warner's performance as Sark.
** Believe it or not, [[WesternAnimation/{{Recess}} Randall]] appears as Demyx.
** Creator/ToruOkawa, Iago's Japanese voice actor, just happens to be [[Franchise/RatchetAndClank Clank]].
** Xigbar had also appeared on the TV Show ''StillStanding''.
** Play the game in Japanese, and you'll notice that Tron sounds a lot like [[{{Anime/Pokemon}} Professor Sycamore]]. That's because they are both voiced by HiroshiTsuchida.
** In the French dub, Organization XIII is ruled by [[Franchise/JakAndDaxter Damas]].
* TalkingToHimself: In the Japanese version, DonaldDuck, Genie and Stitch are voiced by the same seiyuu.
* WhatCouldHaveBeen:
** Alternate final boss forms for Xemnas that feature him apparently breaking up and surrounding himself with chunks of the Dark City, [[http://images.wikia.com/kingdomhearts/images/4/49/King.jpg "King" and "Centaur",]] were conceptualized.
** A planned-to-be-''Final Mix''-exclusive summon featuring [[WesternAnimation/ToyStory Buzz and Woody]] apparently made it far enough to be DummiedOut.
** Judging from the early trailers, they were planning on making the outside walls (i.e. the areas covered in the first game) of the Hollow Bastion castle playable.
** Variations on the Behemoth and Wyvern Heartless were present in the 1000 Heartless battle in older trailers.
** The game was planned to feature battles against all the Organization members in the Coliseum. This was dropped due to lack of time and eventually implemented in a different way in ''Final Mix''.
** [[http://www.kh2.co.uk/assets/kh2/artwork/kh2uc12.jpg Double-bladed Keyblades.]]
** David Warner did not reprise his roles as the MCP and Sark even though he wanted to because he had already committed to another role when he was asked and was unable to do both.

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