* BeamMeUpScotty: Without going into spoilers, the game's famous MemeticMutation is actually "Who else will I have ice cream with?", not "who will I eat ice cream with?"
* HeyItsThatVoice:
** [[Creator/ChristopherLee Christopher. FUCKING. Lee.]] Coming out of your DS's speakers.
** Namine is also [[Film/CampRock too cool for us]]. and Kairi [[Film/CampRock is helping Demi Lovato with the final jam]].
** Black hair... blue eyes... SWEET ANSEM! [[WesternAnimation/PhineasAndFerb Isabella]] is a [[spoiler:Sora-clone]]!
** Xion is also [[WesternAnimation/HollyHobbieAndFriends Holly Hobbie]].
** Roxas and Xion will later become [[WesternAnimation/YoungJustice Robin/Nightwing and Batgirl]] respectively.
* TheOtherDarrin: DoubleSubverted. Although Christopher Lee came back to voice [=DiZ=] in this game after Corey Burton voiced him in ''Re:Chain of Memories'', he was replaced again in the 1.5 HD Remix due to added scenes and to keep consistency between the voices.
** Similar to the above, the 1.5 HD Remix extended Mickey's sole scene with Riku, but because Wayne Allwine passed away shortly after recording the original, Bret Iwan had to take over.
* UpdatedRerelease: {{Averted}}: Notable, as this is the only game in the series so far not to be remade or given a [[NoExportForYou Final Mix]]. Its cutscenes, however, are being redone with the series' traditional PS2 in-engine graphics for ''Kingdom Hearts HD 1.5''. See WhatCouldHaveBeen below.
* WhatCouldHaveBeen:
** Luxord's Mystery Gear weapon was originally meant to be ''[[http://snowpirateroy.deviantart.com/art/Mystery-Gear-References-152647191 dollar bills]]''.
** A world based on the circus scenes from ''Disney/{{Pinocchio}}'' with a WhatMeasureIsANonHuman-centered plot was planned but scrapped due to space limitations, though elements of this plot point found new life in ''VideoGame/KingdomHearts3DDreamDropDistance''. Not to mention, there are still some ''Pinocchio'' assets [[DummiedOut hiding in the game data]].
** A full remake was considered to be made as part of ''[[UpdatedRerelease Kingdom Hearts HD 1.5 Remix]]'', gameplay and everything, but was scrapped due to time concerns.
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