History VideoGame / PaperMarioTheThousandYearDoor

** The Slow Go badge, originating in ''Paper Mario'', prevents Mario from running. While there was a very niche use for it there (sneaking past sleeping Clubbas), in this game it returns despite having no practical benefit.

* LanguageFluencyDenial: [[PollyWantsAMicrophone The birds will talk intelligently if you hide.]] But if you're not hiding, they don't and the parrot says the stock parrot phrases. The parrot drops the act after the end of the chapter, though.

* InconsistentDub: The "Lil' Mouser" species, which were already being called "Nomidamice" in the 64 ''Paper Mario'', are instead called "Squeek" in this game alone, which incidentally is closer to their Japanese name.

** The Shy Guys are a downplayed example in this instalment. They aren't fought as enemies to be encountered, only appearing as a rare hindrance or assist during battles. They sometimes run backstage and cause something to fall on either Mario, his partner or one of the enemies.

* ManaBurn: Flower Fuzzies can suck up your FP and use it as their own. Once they get 4 FP, they can unleash an electric wave attack that pierces defence and hits both Mario and his partner.

* ManaBurn: Flower Fuzzies can suck up your FP and use it as their own. Once they get 4 FP, they can unleash an electric wave attack that pierces defense and hits both Mario and his partner.

** The Shy Guys is a downplayed example in this installment. They aren't fought as enemies to be encountered, only appearing as a rare hindrance or assist during battles. They sometimes run backstage and cause something to fall on either Mario, his partner or one of the enemies.

* SirNotAppearingInThisTrailer: While [[spoiler:Vivian]] is featured in footage [[spoiler:alongside Beldam and Marilyn]], the trailers completely hide the fact that [[spoiler:she joins your party, even cropping her out during Doopliss's VillainousBreakdown]]. The only other character not showcased like this is the [[spoiler:secret character Ms. Mowz]]. However, some key art and promotional images do [[spoiler:imply she joins Mario party, with even one website mentioning about her MistreatmentInducedBetrayal]].

* SirNotAppearingInThisTrailer: While [[spoiler:Vivian]] is featured in footage [[spoiler:alongside Beldam and Marilyn]], the trailers completely hide the fact that [[spoiler:she joins your party, even cropping her out during Doopliss's VillainousBreakdown]]. The only other character not showcased like this is the [[spoiler:secret character Ms. Mowz]].

** When you are in the Keelhaul Key chapter, at one point, the pirate "Four-Eyes" ([[PaperThinDisguise a.k.a. Lord Crump]]) looks at the TV and tells the audience not to tell Mario who he obviously is. Weirdly, if your partner is Goombella at this point she will have just broken the fourth wall in Chapter Four and then acts confused when someone else breaks the fourth wall in Chapter Five.

* UniversalEyeglasses: Grumpy chef [[PunnyName Zess T.]] loses a contact lens and demands everyone stop moving while she looks for it. The game leaves Mario [[ButThouMust no choice]] but to move or jump, and he inevitably steps right on it. At this point Zess [[NPCRoadblock blocks the archway]] into west Rogueport until Mario buys her a replacement from a local bazaar -- no prescription needed.

* UnderestimatingBadassery: The FinalBoss assumes Mario and his party "do not possess any power" and offers to spare them if they agree to serve under her. Naturally, she is proven to be wrong about Mario and co. not having power.
* UndergroundCity: Rogueport Sewers used to be the original Rogueport, buried and ruined by time. A small, somewhat intact section of sewers still houses a decent amount of inhabitants.

[[/folder]]

[[folder:U-Z]]
* UndeadCounterpart: Hooktail, [[spoiler:Gloomtail]], and then Bonetail at [[spoiler:the end of the Pit of 100 Trials]]. Though they're all bosses, they're incredibly similar; Bonetail's essentially a new skin (NoPunIntended) for Hooktail.
* UnintentionallyUnwinnable:
** During the time bomb sequence in chapter 2, hitting a save block with a few seconds left on the timer can trap you into an unavoidable game over, as Crump and the Puni Elder's conversation will outlast the timer, and can't be skipped or avoided due to it segueing into the chapter boss. The only way to get out of it is to start a new file.
** The tournament fights in Chapter 3 will assign you with a random condition that needs to be fulfilled in addition to winning the fight, such as never letting your partner attack at all, or not being able to use FP. It is in fact possible to get one of these two conditions against the Iron Clefts, which makes it completely impossible to defeat them since you need to use Yoshi's gulp to hurt them, and gulp costs 4 FP to use. While you can just ignore the fight condition, doing so will cause your rank to suffer and you'll have to fight the Iron Clefts again.
* UniqueEnemy:
** While regular Clefts are common enemies, Bald Clefts only appear in one room in Petal Meadows as a scripted tutorial battle, and they never respawn.
** There is exactly one X-Yux in the entire game, guarding the door to Grodus's office in Chapter 7. [[spoiler:Failing the Thwomp quiz will force you to fight two at once, however]].
** Many, many enemies in Glitzville. Examples include Red Spiky Buzzy Beetles, the Red, Green, and White Magikoopas, the Fire and Boomerang Bros, and KP Koopas. Some of them, such as Pokeys, Bomb-ombs, and Dark Koopatrols, also show up in the Pit of 100 Trials. Since all of the Glitz Pit exclusive enemies can technically be fought an unlimited amount of times, they won't appear in Professor Frankly's waste basket once you're done fighting them (meaning if you want to put them in your Tattle Log, you need to either Tattle them the first or second time you go through Glitz Pit - or as a worst case scenario - intentionally lose every match until you record all of the enemies you need).
* UniversalEyeglasses: Grumpy chef [[PunnyName Zess T.]] loses a contact lens and demands everyone stop moving while she looks for it. The game leaves Mario [[ButThouMust no choice]] but to move or jump, and he inevitably steps right on it. At this point Zess [[NPCRoadblock blocks the archway]] into west Rogueport until Mario buys her a replacement from a local bazaar -- no prescription needed.
* UnreliableExpositor: According to his partners, Luigi makes himself out to be better than he is when recounting his off-screen adventure. It's not entirely clear who's telling the truth.

* UnexplainedRecovery: [[spoiler:TEC caused the X-Nauts' base to self-destruct at the end of Chapter 8, but him and the base somehow return after you beat the game.]] [[LampshadeHanging Not even he has a clue on how it's possible.]]

* NearVillainVictory: In the final area of the game, [[spoiler:Grodus nearly manages to achieve his plan of conquering the world... unfortunately for him, the Shadow Queen wasn't about to be bossed around, practically destroying him with a bolt of lightning.]]

* EarlyBirdCameo: Bulky Bob-Ombs don't appear as actual enemies until Chapter 5 (Pit of 100 Trials notwithstanding), but they'll join as part of the audience in battles against [[spoiler:Macho Grubba and Doopliss at the end of their respective chapters]]. You'll start seeing them regularly integrated with the audience during their chapter.

** Similarly, the Toad outline in the Bandit's house in central Rogueport has been removed in all versions of the game. In the original, this only appeared in the Japanese released, but was removed internationally.

** The Puni's antennae now glow red during certain animations or in combat against the Jabbi.

* AccidentalUnfortunateGesture: Mario says hello with a salute that looks a little bit too much like he's actually trying to heil Hitler. Due to the resemblance, the gesture was removed in all European versions of the game.

** The Goombas encountered in Rogueport Sewers no longer hit on Goombella.

** Bowser orders one of his Hammer Bro minions to do some sit-ups. In the original, Bowser mocked his minion's weight, but the remake has him tell his minion to make sure he hammers his abs.

** Bowser orders one of his minions to do some sit-ups. In the original, Bowser mocked his minion's weight, but the remake has him tell his minion to make sure he hammers his abs.

** The Mailbox SP now has its own individual space in the menu, making it easier to acess it.