Shout Out: Kingdom Hearts

  • The majority of Mook Nobodies are named after the various job classes in the Final Fantasy series, and often behave as such.
  • The Darkside Heartless is named after Tales from the Darkside, an anthology horror TV series. The Twilight Thorn is called Twilight Zone in Japanese, referencing another famous horror TV series.
  • The poses Sora does when he wins a tournament round in the first game are victory poses from Final Fantasy VII, VIII and X.
  • Most of the Gummi Ship names are names of various airships from the Final Fantasy games.
  • Part of End of the World from the first game seems to have been inspired by Nowhere.
  • Xigbar's title, "Freeshooter", is taken from the title of the German opera Der Freischütz. The eponymous marksman makes a Deal with the Devil in exchange for seven magical bullets; the first six are controlled by the marksman while the seventh is controlled by the Devil.
  • While fighting the hydra in Kingdom Hearts II, you can use a reaction command called "Urninator".
  • Also in Kingdom Hearts II, when Cloud goes up against Sephiroth, Sephiroth begins his Hannibal Lecture. Cloud tells him to shut up.
  • In Kingdom Hearts: 358/2 Days, there's a set of weapons called Casual Gear. When this is equipped, Demyx's sitar turns into a tennis racket. It's name? Prince of Awesome. Another of Demyx's weapons in Days is called "Up To Eleven".
  • The last Gummi route in II, Assault of the Dreadnought, is a direct homage to Star Wars, particularly the Death Star battles in A New Hope and Return of the Jedi. Likewise, as a continuous homage to the theme naming from the Final Fantasy series, two shopkeepers (one in Twilight Town, the other in Hollow Bastion/ Radiant Garden) are named after Biggs Darklighter and Wedge Antilles, though the presence of Jessie confirms they are based on the Biggs and Wedge of Final Fantasy VII, instead.
  • The leaves in the Golden Wood section (which is exclusive to Riku) in Symphony of Sorcery (in Kingdom Hearts 3D: Dream Drop Distance) will play notes sounding similar to the solfège (do-re-mi-fa-sol-la-ti), which was made famous by The Sound of Music.
  • The name of the Keychain obtained from The Grid, the Dual Disc, seems to serve as a pun to a certain gadget invented by Seto Kaiba.
  • Probably unintentional, but in the 2.5 version of Kingdom Hearts II Final Mix, the trophy obtained from completing the Pride Lands is called "Return of the King".