History Fridge / PaperMarioTheThousandYearDoor

* How did Grodus and Beldam manage to get ahead of Mario in the Palace of Shadow if they needed him to open and go through the door for them first? Well, Mario and co ''did'' get sidetracked fighting Gloomtail and solving riddles in the underground city area...

* The L and W Emblem badges, which change the color of Mario's clothes to match Luigi and Wario respectively, are obtained in ways that correspond to their respective characters. Luigi is known for his high jumping ability, and the L Emblem is located on a high ledge that requires performing several spring jumps to reach (in the house of a person who thinks Mario is Luigi as well). The W emblem is bought from the merchant in Rougeport at a staggering 360 coins, making it the most expensive badge in the game... which perfectly fits in line with Wario, who is greedy and egotistical, and loves money over anything else. Putting both of them on turns Mario into ''Wa''- ''Luigi''.

[[folder:Fridge Logic]]
* Glitzville is presumably in the skies of the Mushroom Kingdom, yet pretty much nobody there recognizes Mario or Bowser!
** Rogueport and the areas connected to it seem to take place in an area separate from the mainland of the Mushroom Kingdom; not everyone recognizes Mario. Jury's still out on Bowser. At the same time, only Grubba himself was stated not to know Bowser in Glitzville, calling him a nutcase who tried to ambush Mario.
** Although, a select few characters such as Goombella and Koopie Koo do recognize Mario, so it could be possible Bowser garnered a bigger reputation due to his appearance and evil deeds (because really, who's going to care about an overweight middle-aged man dressed like a plumber compared to an intimidating fire-breathing turtle with access to weaponry and an army?).
[[/folder]]

* When Luigi ends up telling his stories of the Marvelous Compass, the partners end up falling asleep... all except for Admiral Bobbery. This makes sense, given that Bobbery is a sailor, who's very likely no stranger to hearing tall tales, and propbably told a few himself in his heyday.

* Mario's in possession of the Magical Map, which points him towards the location of each Crystal Star. How then, could the X-nauts have possibly known about the Crystal Stars in Hooktail Castle and Boggly Woods if they didn't have the map to tell them? Well, there's a certain NPC in Rougeport named Grifty who will tell you the story about the original four heroes for a few coins. His stories reveal said heroes hid the Crystal Stars in Hooktail Castle, Boggly Woods, Creepy Steeple, and Keelhaul Key, meaning the X-nauts simply paid him to tell them the locations! The X-nauts already had one Crystal Star that they found in Rougeport (which was likely what prompted them to go to Grifty, who has knowledge about them), leaving two unaccounted for:
** The Garnet Star in Poshley Sanctum. The X-nauts initially had no idea of its location until Beldam overheard Mario's partner mention it. What they ''didn't'' account for was the Sanctum owner had a supply of fake stars for the specific purpose of deterring thieves, giving Mario the opportunity to grab the real one without opposition.
** The Gold Star in Glitzville. The X-nauts never learn of its location, and indeed, neither the X-nauts or the Shadow Sirens make any appearance in Glitzville, and the chapter overall has nothing to do with them.
* Given the fact that the champion's belt in Glitzville was regularly showed off and clearly had what looked like a Crystal Star, why didn't the X-Nauts realize that the Gold Star was hidden there? Simple, the star on the belt is fake and an observant eye can tell when they get close enough. And while Mario had a magical map telling him that the Crystal Star was there, the X-Nauts likely wrote off the place once they saw the fake star since they had no way of knowing that the real thing was also there.

* Why didn't Vivian seem to know the X-nauts' base of operations was on the moon (which would have given Mario and co. a great advantage)? Because Grodus' office was located below the surface of the moon, and the Shadow Sirens travel by going underground into the shadows, meaning Vivian wouldn't have seen anything to clue her into the location. Not to mention, the location was irrelevant to their mission, and Vivian knows better than to start questioning her sister about things.

* It's easy to laugh at Bowser for being LockedOutOfTheLoop and not getting any Crystal Stars throughout his interludes, but he ''did'' reach several places where Crystal Stars were. It's just that Mario got there first. And unlike Mario, Bowser didn't have a magic map that tells him where each Crystal Star for free. If Bowser had got there first, he would have ended the game with several Crystal Stars on hand.

* It's easy to laugh at Bowser for being LockedOutOfTheLoop and not getting any Crystal Stars throughout his interludes, but he ''did'' reach several places where Crystal Stars were. It's just that Mario got there first. If Bowser had got there first, he would have ended the game with several Crystal Stars on hand.

** Although, a select few characters such as Goombella and Koopie Koo do recognize Mario, so it could be possible Bowser garnered a bigger reputation due to his appearance and evil deeds (because really, who's going to care about an overweight middle-aged man dressed like a plumber compared to a dangerous, fire-breathing turtle with access to weaponry and an army?).

** Although, a select few characters such as Goombella and Koopie Koo do recognize Mario, so it could be possible Bowser garnered a bigger reputation due to his appearance and evil deeds.

* When confronting Grodus in Chapter 8, he makes no mention of Vivian being with Mario if she happens to be your active partner at the time. This seems odd since he's been working with the Shadow Sirens since the beginning of the game. However, this makes more sense when you take into account that Vivian was the "screw-up" of the group. Grodus probably didn't really care since he figured someone that unreliable was better off with the good guys anyway, or if he did care, he had more important things to deal with (Mario, the Crystal Stars, and the Shadow Queen) so he didn't think to say anything.

* When helping Bud find a birthday present during Chapter 6, talking to Zip Toad will have him tell Mario he only gives out autographs to hot girls, and taking out your female partners will yield no reaction whatsoever. This seems like a case of GameplayandStorySegregation, right? Well, later on it's revealed "Zip Toad" is actually Doopliss in disguise, so it makes perfect sense why he would refuse to give Mario an autograph: if he had, he would have been helping Mario! (Or not, since Bud actually wanted the engineer's autograph, but Doopliss had no way of knowing this).