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* AlternateCharacterInterpretation: The pink Birdo quits being a boss after World 2-1 and the last time you ever see her is World 4-3, where she is a HelpfulMook. Did the pink Birdo undergo a HeelFaceTurn and to atone for assisting Wart, wants to help Mario and friends progress on their adventure?
* BizarroEpisode: This game is quite different from your usual ''Mario'' platforming game. Toad and Toadstool are playable, there's a new villain to fight with Bowser nowhere to be seen, the gameplay is slightly different, other enemies and items from the game wouldn't come back, there is [[TakeYourTime no time limit]], and the game turns out to be AllJustADream in the end, something no other ending in a ''Mario'' game does.
* BreatherLevel: World 6-2. It's a fairly short level with virtually no platforming or enemies at all. The player just has to ride an Albatoss across the stage, occasionally leaping over oncoming enemies or jumping off to get an item, challenges made easy by just using the Princess. At the end of the stage, Birdo is stuck on an elevated platform and there's one above him as well, allowing players to strike at him while basically being untouchable.
* BrokenBase: The third world's dungeon is seen by some as a huge difficulty spike due to the Shy Guy pots and lots of spark platforms and increased length, while others see it as the easiest dungeon in the game due to the abundance of POW blocks, the near absence of instant death traps, the ease of escaping the Phanto, the fact you get all your hearts early, and the lack of ZergRush enemies in the dungeon.
* ContestedSequel: Among fans, this game is one of two things: a very different but fun ''Mario'' game that deserves its status in the series as a classic, or a lazy [[GameMod ROM hack]] of an unrelated Japanese game that while good, [[FanonDiscontinuity doesn't belong in the franchise]].
* DemonicSpiders:
** Bob-ombs, when uprooted, often have an extremely short fuse, damaging you if you don't throw them in time.
** Blue Pansers. They shoot flames in an arc and they move around unlike their red and green cousins.
* DifficultySpike: Depending on whether or not 3-3 is difficult for you or not, this either happens there or in 4-2, a level with a very hard to find fourth mushroom, ZergRush Beezos BEFORE you get to the third mushroom, and some annoying platforming involving an Autobomb, not to mention fighting Birdo on ice. The difficulty spikes again in 5-3 with an area overflowing with enemies plus a tough climb up inside a tree. Then you have to fight Clawgrip.
* EnsembleDarkhorse: [[BigBad Wart]] has become a fan favorite villain, with many fans wishing for him to make a return.
* FanonDiscontinuity: To this day, there are fans who still refuse to accept the game as a part of the ''Mario'' series, even after ''Doki Doki Panic'' was revealed to have been originally conceived as a ''Mario''-style game.
* GameBreaker:
** The Princess's hovering ability. Don't have to worry about risky jumps jumping on disappearing logs when you her ability to jump and just levitate over them.
** In general; Luigi breaks vertical jumping, the Princess breaks horizontal jumping (Mario's ''vertical'' jump height is actually better than her's).
** Luigi's and the Princess' super jumps, when used with the run button for great distance, can not only clear certain pitfalls with ease, but they can also bypass huge chunks of some levels to reach the end faster instead of going the longer normal way. Using said shortcuts will mean passing up a mushroom or two though.
** Interestingly enough, the game manual declared ''Toad'' this, due to his speed and power, saying that you will use him the most, with Luigi and the Princess only for levels that require their jumping abilities. It's probably worth noting that most {{Speed Run}}ners do exactly this.
** ''Super Mario Advance'' made shells rebound from walls instead of disappearing upon contact, and it now ''always'' generates hearts for ''every'' enemy it kills, making it ripe for [[HealThyself exploit]] [[InfiniteOneUps potential]].
** {{Giant|Mook}} Shy Guys and Ninjis, who drop small hearts when thrown, making them an easy source of health should you find yourself taking too much damage.
* HilariousInHindsight:
** The POW block and Starman cameos in ''Doki Doki Panic'', which were present before the game was adapted into a ''Mario'' game - or, rather, ''re''-adapted.
** Luigi being a swap of Mama from ''Doki Doki Panic'', considering the "Mama Luigi" meme in the ''WesternAnimation/SuperMarioWorld'' cartoon.
** TheSpiny enemy Porcupo has a bluish/purple color scheme, predating a certain [[Franchise/SonicTheHedgehog blue-colored hedgehog]] by a few years.
* ItWasHisSled: The whole game is a dream being had by Mario.
* MemeticMutation: The [[EarWorm overworld music]]. [[http://www.youtube.com/watch?v=Hv6RbEOlqRo IT]] [[http://www.youtube.com/watch?v=MwKclhWlo-0 BEGINS]] (second link contains {{NSFW}} content).
* MostAnnoyingSound: To some, the voices in ''Advance''.
* NeverLiveItDown: Its status as a sprite swap ensures that ''Doki Doki Panic'' is almost always brought up in media that refers to this.
* NightmareFuel:
** Phanto. An eerie, grinning mask that shudders to life and hunts you down the moment you pick up a key and does not back off until you either drop it or use it on a door. The ''Advance'' version gets even worse - it gets rather small at first, but then once you throw it away, it grows ''HUGE'' - meaning it's trying to fly ''RIGHT AT THE PLAYER''.
** The final mask gate unexpectedly detaching from the wall and attacking you. It's even worse in ''Doki'', where the hawk head is a creepy, painted tribal mask instead.
* SerialNumbersFiledOff: Pirated versions of this game are sometimes called "Super Wonderful Mario" (on the label) and "Super Bros. 5" (on the title screen). The game is completely the same.
* SophomoreSlump: Few people would call it a bad game, but where the original was the TropeMaker for the platformer genre and the next game is often ranked among the greatest games in history, ''2'' is mostly just considered to be a good game. It also sold fewer copies than the first and third games.[[note]]Being a ''Mario'' game, though, it's far from a categorical flop when it's still the ''third'' best-selling title on the NES; it and ''VideoGame/ZeldaIITheAdventureOfLink'' were both subject to DemandOverload when they debuted.[[/note]]
* ThatOneBoss:
** Clawgrip. He throws lightning-fast rocks that aren't always guaranteed to slow down enough before going down a pit. Good luck getting past him with Toad or Luigi.
** Fryguy. Constantly sweeps around his room raining fireballs and delivers a deadly KaizoTrap to those players used to hitting bosses three times and dying. Fryguy [[AsteroidsMonster splits into four smaller versions of itself]], and the more ones you kill, the ones remaining get faster. You're more likely to get swarmed and taken out by the smaller Fryguys than the lone big one.
* ThatOneLevel: World 5-3 is the stuff of insanity and nightmares. A pretty long level with a blitzkrieg of Albatosses and Bob-ombs in the first part, ZergRush enemies underground, a hornet's nest of Sparks and Bob-ombs inside the tree, and having to contend with magic carpets and enemies on tiny cloud platforms, all leading up to an encounter with Clawgrip.
* UnwinnableByInsanity: In World 2-2 where you must dig through sand, it's possible to force yourself into a dead end by digging up every sand block until they're out of your jumping range. Since the game has no timer, you're stuck there. The only way out without resetting the game is to use the suicide code (Up+A+B on the second controller). This provides the trope image. ''Advance'' also adds a vase to the bottom, and entering and exiting it will respawn the sand, making it impossible to trap yourself in the first place.
* VindicatedByHistory: [[http://www.ign.com/articles/2012/06/15/this-is-shigeru-miyamotos-favorite-mario-game In 2012]], Creator/ShigeruMiyamoto shocked many by dubbing this as his [[CreatorPreferredAdaptation favorite]] ''Mario'' game, tied with the first ''Super Mario Bros.'' General audience reaction has been kinder towards the game in the following years, partly because it is a game that breaks the formula in many ways and introduced numerous defining gameplay mechanics. Of course, rumor has it that he was also more involved in ''Doki Doki Panic'' than he ever was in the original Japanese ''Super Mario Bros. 2''.
* VisualEffectsOfAwesome: The close-up of Mario sleeping in bed at the very end. A very convincing cartoon Mario ''on the NES''.

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