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* AccidentalInnuendo: There are two planets you visit in Honeyhive Galaxy that are strangely shaped in such a way that they look like... Ahem! Well... if you're male, it's in your pants. Whether this was [[GettingCrapPastTheRadar intentional]] or not is up for debate.
* AlternativeCharacterInterpretation: What if Dino Piranha isn't trying to attack Mario and just wanted to play with him? It isn't until Mario hits it with its tail that it becomes angry.
* AwesomeMusic: The soundtrack is among the most beautiful in all of gaming. Not only does the awesome music have [[AwesomeMusic/SuperMarioGalaxy its own page]], but ''every single song on the soundtrack'' has a listing on that page.
* BreatherBoss: Topmaniac, who for some reason gets to guard four stars for being the easiest boss in the game. He also counts as a RecurringBoss (well, to a greater extent than any other boss in the game - even Bowser, who's fought 3 times (the last one's a [[SequentialBoss three-parter]], but still), although he doesn't really get any more difficult to defeat.
* BreatherLevel:
** Beach Bowl Galaxy and Sea Slide Galaxy. Neither have a boss or many enemies, both have a generally relaxed atmosphere and both are based around exploring, side quests and mini games rather than platforming or fighting.
** Collecting all of the purple coin stars can be a grueling task. But in the midst of some of the most challenging levels in the game comes "Plunder the Purple Coins" in the Deep Dark Galaxy: a fairly laid back level with only two (easily avoided) enemies, no pitfalls, and some surprisingly simple underwater bits.
** And, of course, the very very last level, which is your reward for going through hell and back ''twice''. You can only die if you try.
* CatharsisFactor: Flinging Koopa shells at chests, crystals, and enemies feels great. Nintendo seemed to get that, as they created [[AwesomeBosses/SuperMarioBros two bosses to defeat by throwing shells]].
* CreepyAwesome: Bouldergeist is scary, but an insanely cool concept. His intro cutscene is one of the most impressive in the game.
* EnsembleDarkhorse: Rosalina, a female character in a Mario game who [[AvertedTrope averts]] DamselInDistress. How refreshing. [[spoiler:Her tragic backstory also helped her gain popularity.]]
* EpilepticTrees: Rosalina has been an endless fountain of speculation over the years regarding her nature and her origins. About the former, a very common theory is that she's the Goddess creator the Mario universe. [[https://www.youtube.com/watch?v=9iNs5iG2h34&feature=player_detailpage#t=436 Yes, as in its literal GOD]]. About the latter, her uncanny, albeit so far unexplained resemblance to Peach makes everyone assume they're both related one way or another. From people who believe she's her lost sister or her future daughter, as well as Mario's... [[https://www.youtube.com/watch?v=xzWFuEH9HsA or Luigi's!]]
* GameBreaker:
** Mastering the game's very loose physics can make the game ''much'' easier.
** Player 2 in this game seems inefficient compared to the sequel until you realize the cursor not only allows you to freeze obstacles back and forth near instantaneously unlike the Luma but some projectiles such as fireballs are outright DESTROYED touching it. Bosses like Bowser and Kamella become complete jokes with it and you can freeze things such as the rotating and vanishing platforms of Luigi's Purple Coins in extremely quick succession.
* GoddamnedBats:
** Frozen ones, too! They can only be harmed with the tricky-to-aim Fire Flower, and one touch will freeze you for a while. Thankfully, they only show up in one mission.
** Octoguys are a major pain as well. They're pink chubby Octoombas whose attack strategy is to run away while shooting at you. They're fast and a pain to catch, even when they take a break to catch their breath, and their spit rocks are at a perfect arc to hit you if you try jumping towards them.
%%* GoddamnedBoss: At least three examples: Kamella, Bouldergiest, and Kingfin.
* HarsherInHindsight: In a way, [[spoiler:young Rosalina's]] offhand comment about growing into an old lady becomes somber when one remembers that [[spoiler:she becomes TheAgeless, and never gets to grow old with her original family.]]
* SugarWiki/HeartwarmingMoments:
** The scene where Mario flies with the Grand Star with Peach in his hand.
** The ending of the storybook: [[spoiler: Young Rosalina accepts the Lumas as her new family and becomes the Mama they were looking for all along.]]
* HilariousInHindsight:
** The game's title was first used in a fan letter published the December 1991 issue of ''Magazine/NintendoPower''. The letter in question detailed a fantasy game system which would come bundled with a game titled ''Super Mario Galaxy'', but would be "better known as ''Super Mario Bros. 24''!"
** The Toad Brigade leader in [[spoiler: Grand Finale Galaxy]] says: “Koopas... Boos... Giant, overgrown moles... Whatever! Bring it on!” About seven years later came ''VideoGame/CaptainToadTreasureTracker'', ADayInTheLimelight for Captain Toad, where he is able to take on Boos with his [[LightEmUp bright headlamp]], and can also catch Pluck Moles to earn prizes. He can also take on enemies like Chargin' Chucks, Hammer Bros, and Magikoopas, which are technically Koopas.
* ItsEasySoItSucks: Some find that the game's greatest flaw is that getting half the game's stars to fly to [[FinalBoss Bowser]] is too easy.
* ItWasHisSled: The fact that getting all 120 stars allowed one to play as Luigi became common knowledge shortly before the game even came out. Helped by the fact that him being playable in a 3D ''Mario'' game was widely [[UrbanLegendOfZelda rumored]] and demanded ever since his omission in ''VideoGame/SuperMario64''.
* LauncherOfAThousandShips: Again, Rosalina. She's been paired off with the likes of [[OppositesAttract Mario]], [[NotSoDifferent Luigi]], [[ShipsThatPassInTheNight Waluigi]], [[LesYay Peach]], and [[FoeYay Bowser]]. And her being a fighter in the fourth ''VideoGame/SuperSmashBros'' starts up some {{Crossover Ship}}s.
* MemeticMutation:
** "U R MR GAY", based on a sheer coincidence someone discovered on the cover of the game. The stars highlighted the letters on the game's logo, spelling out said sentence.
** "U R MI ALY", a coincidence found in the logo of ''VideoGame/SuperMarioGalaxy2''. The stars highlighted the letters to form this sentence.
** "YA I M R U" , a coincidence found on the logo for ''VideoGame/SuperMarioGalaxy2'', Again, the stars highlighted the letters to from this sentence, but now, it must be read from right to left and from bottom to top.
%%* {{Moe}}: The girl in the story book (Rosalina) is definitely this.
* {{Narm}}: The drowning sound Luigi makes whenever he falls into quicksand or toxic waste sounds more funny as opposed to Mario's drowning noises.
* MostAnnoyingSound: That "zing-out" whistle that plays every single time you long jump or when Yoshi ejects a spiny. You're gonna be hearing this frequently in sections where you're forced to long jump. And Luigi's is much worse. Not only does it make a zing-out whistle, but Luigi emits an irrather faint grunt.
* NauseaFuel: With the gravity and camera angles (you often appear sideways or upside-down), it can get a bit disorienting. If you get motion sickness easily, play in Deep Dark Galaxy at your own risk.
* OlderThanTheyThink: The 3D GravityScrew platforming that this game is well known for actually didn't originate here. Other games, such as ''VideoGame/{{Psychonauts}}'', had utilized similar game mechanics years before ''Galaxy'' was released.
* TheScrappy: Gearmos. Two of them run the [[ThatOneLevel trash cleaning missions]] and will yell at you every time you run out of time. They also appear at the end of the Purple Coin challenges for the Battlerock and Dreadnought Galaxies to chide you if you don't get enough purple coins before reaching them, followed by you losing a life afterwards.
* ScrappyMechanic:
** Swimming underwater is a major pain in the ass. The worst aspect of it is if you overswim your target by just a little bit, it's next to impossible to turn back around without going way out of your way.
** [[PowerupLetdown The Spring Mushroom power-up.]] You can't stand still while you're wearing it, the movement is very wobbly, and it requires precise timing in order to do a high jump (and unsurprisingly, the areas in which you find the spring require many such jumps). It doesn't help that it doesn't appear until very late in the game, which means you have to use it on some of the harder levels without having a chance to practice using it in easier levels first. It even appears to be this in-universe, as [[http://www.mariowiki.com/File:Spring_Mario_Art_-_Super_Mario_Galaxy.png the promotional picture]] of this power-up shows Mario looking horrified as if to say [[WesternAnimation/TheJetsons "STOP THIS CRAZY THING!!!"]]
** Ray Surfing in the Loopdeeloop and Loopdeeswoop Galaxies, mostly due to the difficulty of maneuvering the manta ray due to the sensitive motion controls.
** Rolling the Star Ball in the the Rolling Greens Galaxy, the last part of Mission 2 for Melty Molten Galaxy, and Rolling Gizmo Galaxy. Even [[{{Waggle}} a slight tip in the wrong direction of the Wii Remote]] has a chance of resulting in complete and utter failure, and jumping can be very dangerous due to the very different pattern.
** Using the Sling Pods in the Space Junk and Sling Pod Galaxies. Even the slightest deviation during aiming can make Mario miss the next Sling Pod and fall into doom unless a Pull Star is close.
** The bubble blowing levels: like the Star Ball and the Sling Pods, it requires remote-perfect precision.
** Pull Stars seem to have been conceived just to torture people. It reaches its most irritating during the purple coin mission at Ghostly Galaxy, where one must pull themselves past mines and collect coins within an ungodly strict timeline. "Topman Tribe Speed Run" is almost as bad: in one section you have to navigate through a corridor lined by cannons, and if you get hit by a cannonball [[CycleOfHurting it is hard to avoid getting hit multiple times while recovering]], but that's not the hard part, since it's easy to figure out the proper timing. The hard part is the end of the section, as the pull stars are too far away from the star that warps you to the next section to reach it, even if you drift, and the only way to get over there is to build up enough angular momentum using the last three pull stars, one of which is off the screen half the time. Even then, there is no guarantee that Mario will be pulled in the right direction, making it a LuckBasedMission. It isn't near as bad on the normal run, since you can take your time, but with the Speedy Comet, if you don't make it on your first or second try, you will run out of time. The Pull Stars are the only part of the level that is all difficult, but most infuriating, if you fail at any point, you have to start the whole level over again, since Prankster Comets remove stage checkpoints.
** While throwing fireballs as Fire Mario, you cannot change direction, which means you have to wait for the animation to stop before you can adjust your aim. This can cause some torches to be missed because you were stuck in the firing mode and didn't have enough time to turn around before the power-up wore off.
** Prankster Comets are annoying enough as they are, but the game makes the missions forced- if a comet is in orbit over a galaxy, ''that mission is the only one you can play.'' This means you'll either have to get it to move (by completing a regular mission or the Prankster Comet Luma) or play it to access the rest of the missions again. If you really don't want to deal with the level when it's there, you've got to waste a bit of time getting it away.
** After completing a Prankster Comet mission, all Comets will disappear from the map until a regular mission is cleared or the Prankster Comet Luma is paid to move them and bring them back, meaning that one cannot tackle Comet missions consecutively without interruption. If you save up your Comets or get every other Star before unlocking the Purple Comet, you're going to have to waste a lot of time replaying missions or talking to the Hungry Luma just to get the Comets back.
* SuspiciouslySimilarSong:
** [[https://www.youtube.com/watch?v=EuYNxzSFRk8 The Space Junk Galaxy theme]] sounds an awful lot like [[https://www.youtube.com/watch?v=c5AZERT4UmU the Magicant theme]] from ''VideoGame/EarthBoundBeginnings''.
** [[https://www.youtube.com/watch?v=KYhmHovdBxY Battlerock Galaxy theme]] sounds very similar to the [[https://www.youtube.com/watch?v=D2LJPYBQfKg Space Armada theme]] from ''Videogame/StarFox1''
* TearJerker:
** The storybook's last chapters, which narrate Rosalina missing her already deceased family.
** There's one where the Lumas [[spoiler:sacrifice themselves to stop the black hole]].
* ThatOneBoss:
** Beating Bouldergeist the first time is relatively easy. Beating him again with ''one hit point'' for the Daredevil Comet Star achieves controller-breaking levels of frustration.
** The Daredevil Comet version of Kamella is even harder. It's pretty easy to get the first two hits on her, but following her up to the crow's nest without getting hit and then dodging the fireballs and Magikoopas to score two more hits on her requires epic levels of patience and persistence. Her new teleport ability makes it very dangerous when she goes onto the arena, and in the latter half, where she spends most of her time outside the crow's nest, she may teleport directly into the middle, which is almost a guarantee for contact damage if you're distracted by everything else. You can spin attack the Magikioopas to get them out of the way for a bit, but considering that Kamella keeps hurling fireballs at you while you try to do this, it's easier said than done. Also, be careful climbing the pole to the crow's nest, as it's entirely possible for an errant fireball to hit (and thus, kill) you before you even reach the second stage of the fight.
** Fiery Dino Piranha can be incredibly frustrating. Having to time hitting his tail when it's not on fire wouldn't be so bad if you weren't having to chase him/run away from him at the same time. Thankfully, the game doesn't make you do a Daredevil run of this one.
** The Undergrunt Gunner in the Toy Time Galaxy can be incredibly frustrating, especially since defeating it all but ''requires'' the use of the Spring Mushroom.
* ThatOneLevel:
** Some of the Purple Coin missions, and especially ''Luigi's Purple Coins''. The reasons are because of the obstacles present and the need to sort them within a time limit.
** Any of the Cosmic Luigi races. Sure, Cosmic Mario's easy enough to beat, since he basically just follows the beaten path, but Cosmic Luigi spams [[{{Speedrun}} speedrunning]] tactics like rapid long-jumping and taking extremely obscure shortcuts. Needless to say, if you can beat Cosmic Luigi, consider yourself a master of whatever level you're playing.
** Bubble Blast Galaxy, because of the difficulty of guiding the bubble through the electric maze, and the fact that the ending sequence doesn't allow you to be slow and careful, leaving your chance of survival at the high speeds you're forced into mostly up to luck.
** The Daredevil Comet mission on Melty Molten Galaxy. Unlike the other Daredevil Missions, this one requires you to play the entire stage, instead of just a boss. A stage mission that's already frustrating. This was likely made into a run because it is next to impossible to not get hit battling the Fiery Dino Piranha.
** ''The trash cleaning missions.'' You have an extremely limited amount of time to throw bombs in PRECISELY the right spots so the bombs with their annoyingly long timers will blow each other up. Given that in this game, it is nearly impossible to judge where PRECISELY any object you throw will land, you will often miss just one or two of them, at which point you will be yelled at by a robot for not doing it fast enough. Also it takes approximately 10 seconds for one of the bombs to explode, so you really only have 20 seconds.
** The difficulty curve of Sweet Sweet Galaxy ''really'' got some players with ''those moving holes''.
** Sling Pod Galaxy requires ridiculously precise aiming, as a shot even a millimeter off target means instant death. Have fun!
* TheyWastedAPerfectlyGoodCharacter: After Kamek blasts Mario into space in the opening, he only appears as recurring mooks after that, with Kamella taking the boss role (and not much of a story role past that.)
* ToughActToFollow: Many people see ''Galaxy'' as the gold standard of ''Mario'' games and especially the 3D titles, to the point that it currently stands as the best-reviewed video game of all time on [=GameRankings=].[[note]]It even managed to outrank the apparently undefeatable ''VideoGame/TheLegendOfZeldaOcarinaOfTime''![[/note]] Since then, no ''Mario'' title (not even its own sequel, albeit very narrowly) has been able to reach the same level of universal acclaim; in particular, while subsequent 3D titles ''VideoGame/SuperMario3DLand'' and ''VideoGame/SuperMario3DWorld'' are lauded by many in their own right, a noticeable subset of fans view them as a step down from both ''Galaxy'' games.
* UglyCute: Dino Piranha. It's a weird [[ExactlyWhatItSaysOnTheTin half-Piranha Plant, half-dinosaur]] creature, but it just looks so huggable.
* UnderusedGameMechanic: Flying Mario. It's only used in one solitary mission back at the Gateway Galaxy, and for easy access around the Comet Observatory. It's only obtained at the point where you can beat the game so it's largely pointless. Worse is that a spin attack from Flying Mario can actually pull nearby purple coins toward you. If that's not reason enough why they should have included the powerup in other missions, just imagine using it in a boss battle. They don't even return in the MissionPackSequel ''VideoGame/SuperMarioGalaxy2''.
* VisualEffectsOfAwesome: Despite running on ostensibly aged hardware, the game still manages to pack quite a punch in the visuals department, thanks to a [[SugarWiki/AwesomeArt fantastic art style and well-done backgrounds.]]
* TheWoobie: [[spoiler:Rosalina]] in the storybook. As a young girl, she related to an orphaned Luma who was missing it's mother, due to her own MissingMom, and decided to go on a journey with it to find their mothers among the stars. She spends years in space, and never found the Luma's mother, and eventually realized that her mother had been DeadAllAlong, and her father and brother had likely followed suit while she was gone. All this happens in her preteen years. She eventually gains a new family by adopting every Luma she could find, but even [[spoiler:adult Rosalina]] gives off a vibe of loneliness.