* AlasPoorScrappy: [[spoiler:Luvbi,]] although she ultimately survives.
* AlternateCharacterInterpretation: It doesn't have much bearing on the story, but your individual interpretation of exactly how smart Dimentio is can be very easily swayed if you choose not to believe his IMeantToDoThat claim after Dimension D ends up increasing your power as well as his own. [[spoiler: This can have a little FridgeBrilliance to it if you agree with Tippi's theory that Dimentio is a psychopath. While many RealLife psychopaths are incredibly talented manipulators, they also tend to be impulsive and have trouble thinking their actions all the way through]].
* AnticlimaxBoss:
** Bonechill, the Chapter 7 boss. He's the leader of the Skellobit invasion, implied to be the Mario equivalent of Satan, and personally attacked Grambi... but is a serious pushover. Sure, you can only hurt his head, and Thoreau and Luigi can only attack the head... however, get them both out, then have Luigi super jump. You'll deal double damage from the jump, but what really does it is how you can repeatedly bounce on his head. If you don't kill him the first jump, if you can use Thoreau, do it, then super jump. Let's get a little more specific: Bonechill has 80 HP. If one is to kill most of the enemies you can and got the Power Plus, you should have around 8-10 attack. And super jumping deals double damage... yeah... Bonechill becomes the easiest boss in the game, and he's a late game boss who was designed to make a great emotional impact. It's even worse if you played the previous two games before this, as the Crystal King and Magnus von Grapple 2.0, the other Chapter 7 bosses, were rather challenging bosses.
** If you have Luigi when you battle Wracktail, he's easier than Fracktail, since you can just super jump the horn. Otherwise... not so much.
** Shadoo can be this if you're at a high enough level when you get to him. And considering what [[BrutalBonusLevel comes before him]], that's not all that unlikely.
* SugarWiki/AwesomeMusic: See AwesomeMusic.PaperMario.
* BestLevelEver: Chapter 3, with its pixel-like art design, getting a lot of useful Pixls, and ''especially'' Francis and using him to poke fun at {{Otaku}} people.
* BrokenBase: The game is very divisive among fans of the previous games. Specifically on whether the gameplay is genuinely fun or too easy.
* CompleteMonster: [[spoiler:[[MonsterClown Dimentio]]]] is pretty [[LaughablyEvil entertaining]] for most of the game, but by the end, he's just plain [[NightmareFuel freaky.]] He cracks jokes when causing Mario, Luigi, Peach, and Bowser's deaths, and he also plans to stab Count Bleck in the back ''and'' gain control over the Chaos Heart in order to ensure that all dimensions but his are destroyed so he could recreate the universe in his image and implies that he intends to torture Bleck and his followers as soon as he's killed Mario. Finally, after being defeated by Mario, Peach, and Bowser, he ends up deciding to erase all universes anyway as he is dying, meaning that [[TakingYouWithMe his final action]] was one that would ensure the deaths of what is implied to be at least trillions of people.
* ContestedSequel: The shift away from RPG gameplay to traditional platforming causes this reaction among players.
* DracoInLeatherPants: Dimentio.
* EnsembleDarkhorse:
** [[http://mrl-fc.deviantart.com/gallery/9267467#/d2em8eo People]] [[http://browse.deviantart.com/?qh=žion=&global=1&q=Mr+L#/d1q5jnu seem]] [[http://browse.deviantart.com/?q=Mr%20L&order=9&offset=24&offset=24#/d29cgvn to]] [[http://browse.deviantart.com/?q=Mr%20L&order=9&offset=0&offset=48#/d2v64tp really]] [[http://browse.deviantart.com/?q=Mr%20L&order=9&offset=24&offset=72#/d1hg7pm like]] [[http://browse.deviantart.com/?q=Mr%20L&order=9&offset=24&offset=72#/d1rojsl Mr. L.]]
** Dimentio thanks his [[LaughablyEvil hilarious personality]] and [[MagnificentBastard manipulative skills]].
* EpilepticTrees:
** It's widely speculated that Mimi is [[spoiler:the Pixl Queen, the flawed original attempt at creating a Pixl that turned out evil]]. And also that [[spoiler:she's the result of a witch's experiments to try and create a potion that allows the drinker to shapeshift]].
** A theory on Dimentio is that he wrote the Dark Prognisticus (which would make him [[ReallySevenHundredYearsOld pretty old]].) There's also the question as to why Tippi recognizes him the first time she sees him. He's also [[spoiler:possibly the son of the guy who first created the Pixls, with his daughter being the one who, outraged at his treatment of the Pixls, became the Pixl Queen and led the Pixls to war against the Ancients. The son vanished as a result of this debacle]]. If all of the above is true, [[spoiler:''that means that Mimi and Dimentio are '''siblings''''']]. Holy crap.
** It's also possible that Dimentio is [[http://mario.wikia.com/wiki/Merloo Merloo]] (or perhaps his decendant), one of the four sages in the Tribe of Ancients. Both are described as being powerful, dimension-controlling magicians, and both wrote one of the Prognostici. If Merloo and Dimentio are the same person, this means that Dimentio was a leader of the Tribe of Ancients, and he wrote both the Dark and Light Prognosticus.
* HarsherInHindsight: If you beat [[spoiler: Shadoo]] in the Flopside Pit of 100 Trials, you get a post-battle comment, unique to whichever character you were using. Luigi's line is "Even if he was a fake... [[spoiler:I don't ever wanna fight my Bro]] again!". All well and good if you go through the Pit after completing the game, but, though difficult, it can also be completed ''before'' [[spoiler: fighting Super Dimentio.]]
* HilariousInHindsight:
** Turns out that if Bowser and Peach were to marry, the universe DOES implode.
** One of the items on Francis' wish list is a [[VideoGame/SuperMarioBros3 Tanooki Suit]] with real tanooki fur. When the suit makes an official return in SuperMario3DLand, [=PETA=] throws a hissy fit over [[FurAndLoathing wearing tanooki fur]].
** In some of the levels, there are cracks that appear to be scattered over the universe. Skip to 2010 and cracks in the universe are featured in DoctorWho
* ItsEasySoItSucks: One of the two main complaints thrown at this game.
* MagnificentBastard: Dimentio.
* MemeticBadass: The Green Thunder, Mr. L! [[spoiler:And no, not Luigi; '''Mr. L'''.]]
* {{Narm}}: Admittedly, some people might find Bleck [[spoiler: professing his love to a technicoloured Pixl butterfly]] at the end kind of hard to take seriously, even if it is a Paper Mario game.
* TearJerker: [[TearJerker/PaperMario Over here]].
* TheyChangedItNowItSucks: Those who wanted the usual [=RPG=] [[BrokenBase weren't exactly happy with this game]].
* TheScrappy: Luvbi, due to her attitude. [[spoiler: [[AlasPoorScrappy That didn't stop players]] [[TearJerker from crying over her]] DisneyDeath.]]
* ViewerGenderConfusion: Croacus. It's implied that Floro Sapiens have no sexual dimorphism. All four paintings of the former rulers look exactly the same except for coloring, the second of which is confirmed as female.
* VindicatedByHistory: This game was met with a BrokenBase when it was first released, mainly because not everyone was pleased with its choice to ditch turn-based battles and the reduced difficulty. Nowadays this has mostly died down, ''especially'' with the release of Sticker Star, and people who once loathed the game tend to generally view it as a different but enjoyable game with a great story, almost like a spinoff of a spinoff series.
* WhatDoYouMeanItsNotSymbolic:
** Chapter 7 is full of it, such as the forbidden apple that brings trouble when eaten, the chapter boss being [[spoiler:a former Nimbi who was exiled to the Underwhere]], the Nimbis' battle with the Skellobits, and the fact that [[spoiler:the daughter of a seemingly deistic figure sacrifices herself to save the universe]].
** In Sammer's Kingdom, you might notice lycoris flowers growing along the path. In legends, they're often believed to grow when people who meet shall never see each other again. Pretty epic foreshadowing for [[spoiler:TheEndOfTheWorldAsWeKnowIt]].