* FanNickname:
** Sazh has been dubbed both "Chocobro" and "Chocofro" by his adoring legion. And thanks to Gadot's expy mention he is now called (by the fans that hate him) "not-[[VideoGame/FinalFantasyX Wakka]]".
** Snow was nicknamed "Mr. 33cm" as mentioned above due to his rather large... feet.
*** And at 6'5/6'7 (accounts vary), his "feet" are actually small for his size.
** Galenth Dysley / [[spoiler:Barthandelus]] has recently been dubbed Superpope/SUPAHPOPE!, mainly due to [[spoiler: his fondness for transforming into a mechanical monstrosity and beating the party to a bloody pulp. His own Menvra is also called Hedwig.]] He's also been dubbed [[spoiler:"Barty"]] by some.
** Snow's Gestalt mode has been dubbed "The Motordyke" by a portion of the fandom.
** [[spoiler: Orphan, the final boss of the game, was referred to as Oprah rather frequently during early squabbles over its name.]]
** Aster Protoflorian has been given the name [[VideoGame/PokemonRedAndBlue Bulbasaur]].
** The chocobo chick, or [[LetsPlay/HCBailly Let's Player]] nickname at least: [[RunningGag "Frocobo says NO/YES!"]]
* The game is full of {{Mythology Gag}}s (many more can be found [[http://finalfantasy.wikia.com/wiki/Final_Fantasy_XIII/Allusions here]]):
** The town of [[VideoGame/FinalFantasyIV Palumpolum]].
** And the flying fortress ''[[VideoGame/FinalFantasyIX Lindblum]]''.
** Sanctum Skybase ''[[VideoGame/FinalFantasyII Palamecia]]''.
** Doesn't Cocoon look an awful lot like [[VideoGame/FinalFantasyVII Meteor]]? [[spoiler: It sure does in the ending. Vanille and Fang even use TheLifestream from stopping its descent.]]
** Sanctum soldiers and citizens use something called "manadrives" to cast magic without the threat of becoming l'Cie. They serve the same function as [[VideoGame/FinalFantasyVIII Odine Brand para-magic machines]], just with a different name.
** The cities of [[VideoGame/FinalFantasyIII Nautilus]] ([=NPCs=] also make ''VideoGame/FinalFantasyVI'' and ''VideoGame/ChronoTrigger'' references here) and [[VideoGame/FinalFantasyVIII Eden]].
** The entire fal'Cie civil war and the humans caught in the middle of it mirrors the Archadia/Rozarria conflict in ''VideoGame/FinalFantasyXII'', except a LensmanArmsRace is involved.
** Cocoon itself is a reference to [[VideoGame/FinalFantasyIX Doctor Tot's globe.]]
** [[VideoGame/FinalFantasyIX Cocoon is red, Pulse is blue. The game pits these worlds against each another.]]
** The entire battle system is apparently based around [[VideoGame/FinalFantasyXI Chainspell]], although it is expanded to all attacks rather than being a LimitBreak. Someone more familiar with ''XI'' could confirm/deny this more readily.
** [[spoiler: And Yaag Rosch's last stand near the end of the game involves piloting a HumongousMecha called the Proudclad to fight the group]]. This directly parallels [[VideoGame/FinalFantasyVII Scarlet and Heidegger facing off against Cloud and the others]] in a mecha ''by the same name.''
** And there is an enemy called Manasvin Warmech that looks very similar to the BonusBoss [=WarMECH=] from ''VideoGame/FinalFantasyI.''
** The concept of l'Cie, magic-using humans who mutate into demonic monsters and whose souls solidify into a physical, crystalline form and are forced to fight a war as avatars of {{Physical God}}s are based on [[VideoGame/FinalFantasyVI Espers]], who are...magic-using, mutated humans whose souls solidify into a physical, crystalline form who were forced to fight a war as avatars of {{Physical God}}s.
** The game starts with the ex-Soldier and the black guy on a train. They then proceed to fight a [[VideoGame/FinalFantasyVII giant scorpion robot]].
** The entire dynamic between Fang and Vanille is mined from a single boss battle from ''VideoGame/FinalFantasyIII'': You fight a boss named Hecatoncheir in order to collect the [[MineralMacGuffin Fang of Earth]], four of which unlock the path to the [[TheVeryDefinitelyFinalDungeon Crystal Spire]] and the end of the game.
** And on a similar note, Orphan and Barthandelus are based on DemonicSpiders from ''VideoGame/FinalFantasyV''.
** One of the children in a group of kids when you first arrive one the Nautilus will occasionally say "Run, run, or you'll be well done!" Something said by [[VideoGame/FinalFantasyVI Kefka]].
* HeyItsThatVoice:
** Snow is [[Anime/CodeGeass Schneizel]].
** Hope is [[WesternAnimation/PhineasandFerb Phineas]].
** [[spoiler: Orphan]] [[Creator/HiroShimono evolved]] from being [[Manga/TheWorldGodOnlyKnows the god of conquest]] to ''a god''.
** Cid in both Japanese and English is [[VideoGame/BlazBlue Hazama]].
** Lieutenant Amodar is [[Manga/{{Naruto}} Kakashi]].
** Lightning is [[Franchise/MassEffect Liara T'Soni]]
*** And as of ''[[{{VideoGame/RatchetAndClankIntoTheNexus}} Into the Nexus]]'', she is also Talwyn Apogee.
** Serah is [[VideoGame/SakuraWars not the only one who has sister issues]].
** Galenth Dysley[[spoiler:/Barthandelus]] used to complain that [[VideoGame/SWAT4 you were in his way.]]
** In the Japanese version, [[{{Franchise/SlyCooper}} Carmelita Fox]] takes Dajh away from Sazh.
*** And in the English version, [[VideoGame/FinalFantasyX Lulu]] does the same.
* RelationshipVoiceActor:
** Snow and Nora are [[Anime/CodeGeass Schneizel and Cornelia]].
%%ShoutOut isn't trivia. Don't put it here.
* Gilgamesh was intended to appear as a regular character; a fal'Cie with giant swords. FridgeLogic dictates that he was likely supposed to be the ultimate opponent of Titan's Trials as opposed to [[http://www.youtube.com/watch?v=cqBRU16nCWo Attacus]], as Attacus uses the exact same progressive battle tactics that Gilgamesh did in ''VideoGame/FinalFantasyXII'', and you are arbitrarily given the store ''Gilgamesh Inc.'' as a quest reward for finishing half of the Trials fights. Getting this store as a reward for beating their namesake would have made more sense.
* WhatCouldHaveBeen: According to the ''Final Fantasy XIII Ultimania Omega'', the development team at one point considered making Vanille the official main character of the game, but dismissed the idea as they had already released a trailer and art featuring Lightning in that role.
** The fal'Cie Siren wasn't just in the Pompa Sancta, but is Bodhum's fal'Cie. However, since the player never gets visit Bodhum properly, the only time one can see Siren is in cutscenes.
** Fang was originally supposed to be a man, but was changed to a woman when the developers had to drop Serah from the party. Noel was likely based off those designs.
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