History VideoGame / PaperMarioTheThousandYearDoor

** During mentioned moment above, Partner Hints won't work either [[spoiler:until Vivian joins your party due to nobody being able to tell you where you need to go.]]

* AccidentalHero': [[spoiler:Bowser unintentionally saves Mario's life by crashing through the ceiling on top of Grodus right before the latter delivers a finishing blow to Mario.]]

** Mario has a photo of his partners from ''VideoGame/PaperMario64'' in the same spot as in ''VideoGame/SuperPaperMario''. [[spoiler: The photo of the partners from this game also shows up once Mario returns to his home in the epilogue.]]

* ContrastingReplacementCharacter: [[spoiler: Prince Mush]] is the remake's answer to [[VideoGame/PaperMario64 Paper Mario 64's]] The Master. Just like The Master, [[spoiler: Prince Mush]] serves as an optional SuperBoss that only gives a [[CosmeticAward token key item that has no purpose upon defeat,]] has brutal combo attacks, even gets a BattleAura, and exists primarily to challenge the player. However, there are a few differences.
** The Master is an old man. [[spoiler: Prince Mush]] is young and in his prime.
** The Master has to be fought 3 separate times to obtain the Diploma. [[spoiler: Prince Mush]] only needs to be fought once to get his belt, but has 3 phases depending on his HP.
** The Master's dojo only has himself, Mario and his partner, and his students as the only beings watching (and participating in) the fight. [[spoiler: Prince Mush]]'s fight is watched by hundreds if not thousands of others.
** The Master is mostly TheStoic. He is curt and to the point, though he does get a bit fired up on his last fight though. Once he is defeated for the third time, he cannot be fought any more. [[spoiler: Prince Mush]] is a BoisterousBruiser, eager to throw himself into battle against Mario. While he is a GracefulLoser, [[spoiler: Prince Mush]] is all to willing to have a rematch that he intends to win.

* OhCrap: Mario now visually has this reaction after [[spoiler: the Shadow Queen effortlessly oneshots Grodus for daring to command her.]]

* VoiceGrunting: All characters now speak this way, with each character having a unique soundclip to their "voice" based on their species/voice actors (an idea introduced in ''Color Splash''). For example, Luigi's "voice" sounds just like Charles Martinet's portrayal of him, whereas Koops actually sounds like a Koopa.

* VoiceGrunting: All characters now speak this way, with each character having a unique sound to their "voice". For example, Luigi's "voice" sounds just like Charles Martinet's portrayal of him, where Koops sounds like a Koopa.

** Numerous things which were LostInTranslation in the original version's quiz games have been corrected in the remake. The name of the quiz is now the 65th / 66th Trivia Quiz-Off, rather than Super Quirk Quiz, directly succeeding the 64th Trivia Quiz-Off from Paper Mario. Two Quiz answers, "Kooskoos" and "Mushville", which were misinterpretations of Koopa Koot and Toad Town's Japanese names. The remake properly implements the references.

** Numerous things that got LostInTranslation in the original have been corrected in the remake. For example, one of the answers in the trivia quiz was "Mushville", which is a misinterpretation of Toad Town's Japanese name. The remake properly lists it as Toad Town.

** This also means that if you face her this way, Goombella basically cannot be used, as Hooktail will shrug all of the damage right off with that 1 Defense Power.

** Goombella explains how Star Points work after you defeat Lord Crump for the first time, a tutorial that didn't exist in the original game. Similarly, there's also a new tutorial along the path to Shhwonk Fortress, where Goombella explains the audience members who can either throw items or rocks at you along with explaining how some attacks can cause the backdrop to collapse.

** Changing partners in the original required you to pause the game, cycle through the partners, and then select the one you want. The remake adds a "Partner Ring" that eliminates the need to pull up the pause menu, which makes changing partners on the fly much easier.

** The condition requiring partners to not attack has been changed to requiring partners to not deal damage, allowing Goombella to Tattle the opponent without breaking the condition.

** Like the ''VideoGame/SuperMarioRPG'' remake, the coin counter is now a four figure. Hooktail's offer in her battle is now 10,000 coins to account for this.

** [[spoiler:In the original game, Prince Mush disappears completely after being brought back to life at the end of Chapter 3 despite intending to return to the Glitz Pit. In the Remake, he serves as the second most powerful post-game boss and can be fought in an exhibition match]].

* SoundTest: A sound gallery featuring the game's soundtrack can be unlocked after collecting enough Star Pieces and Shine Sprites.

* ContinuityNod: A remixed version of the title theme from ''VideoGame/PaperMario64'' plays in the trailer. Mario has a photograph of his companions from said game in his house. There's also a map of the Mushroom Kingdom from the same game hanging on the wall. It also doubles as a CallForward, since that photo (along with one of the partners from this game) is in the same spot in the intro of ''VideoGame/SuperPaperMario''.

* ConceptArtGallery: There is now an art gallery that features concept art of various areas and characters that are unlocked by collecting Star Pieces and Shine Sprites.

** With a couple exceptions, prices at the Pianta Parlor have been increased across the board, seemingly to discourage players from grinding to take advantage of its limitless powerful badges like Power Rush and Power Rush P (which have tripled from 34 coins a pop to 100).

** Some time after finding Koopook for his Trouble Center sidequest, he will send an e-mail saying he's hiding in a cold location. In the original Japanese and most translations, the location in question is the Crystal Palace from ''VideoGame/PaperMario64''. The English localization, however, renders as the completely made-up "Goomstar Temple", losing the ContinuityNod.

** In the Japanese script, the Chestnut King has the same name as the Goomba King, the boss of the first game's Prologue. If the two are intended to be the same indiviual, this would mean that Luigi is going on an epic quest to defeat the first game's WarmUpBoss.

* {{Nerf}}: The windows for the Action Commands for Power Bounce and Multibonk are made ''far'' stricter than before. The fourth hit on a Power Bounce abruptly enforces a frame-perfect input no matter what, even with Simplifier badges equipped, causing players to either hit a wall there or make it all the way to nine hits on what may seem like luck.

** Numerous bits of dialogue related to fat shaming were outright changed or removed. 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 does enough exercise that his hammer gets abs too. Likewise, he blames his unexpected drop in entrance on Grodus's head in the Palace of Shadow crummy tower construction.

* CallForward:
** The Battle Toad's theme is a remix of the Autumn Mountain from ''VideoGame/PaperMarioTheOrigamiKing''. Also, Smorg's remixed theme includes a new segment before the loop made up of leitmotifs from The Shifty Sticker, Tape's theme.