These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
In comparison, Hades is one of the most popular characters in the game despite being far more malicious, but it is because he is a clear-cut, unsympathetic villain that players are able to appreciate his over-the-top personality while knowing that he must be stopped. With Viridi, her massacre of a large chunk of the human population is pretty much pushed aside once the Aurum become the main antagonists, and even though her opinion of humans clearly hasn't changed at all by the end of the game, we're meant to simply forget about her misanthropy.
Bizarro Episode: For three chapters, the war between the Gods is put on hold to fight an alien invasion, of all things.
Breather Boss: The boss of Chapter 16, the Aurum Generator, is considerably easier than the bosses before and after it, even on the highest difficulties.
Breather Level: Chapter 20 is significantly easier than both 19 and 21.
Say hello to Tempura Wizard, You though Eggplant Wizards were bad enough? This guy can turn Pit into tempura and then chase him around and if he catches him, it's a One-Hit Kill. And how does that One-Hit Kill function? Well...he eatsyou.
The Reapers have upgraded to Demonic Spider status in this game. They hit extremely hard and are difficult to avoid, and better yet, they can summon Reapettes that can pass through walls and paralyze you.
Clubberskulls are weak to melee attacks. The catch is they also use melee attacks, which can take you out quickly if you aren't careful. Oh, and they're fast.
The mimicuties are surprisingly deadly, as they kick you fast and kick you hard, making for an easy death.
The Merenguy's theme. No wonder Pit can't keep his eyes off them.
Constant replays on all chapters will eventually make you subconsciously memorize what each character says and when. C'mon, you seriously didn't turn the voices off, did you?
8.8: What else can you say when Destructoid's Jim Sterling gave Uprising a 5out of 10?
Yahtzee Croshaw also tore the game apart. Compared to Mr. Sterling, however, Yahtzee had many more complaints about the game than just the controlsnote Incidentally, Yahtzee has a history of difficulty with Nintendo controllers and the 3DS in particular stemming from his hands being too large to comfortably hold them and elaborated appropriately. One major reason being his strong dislike of "Joss Whedon"-esque humor in general.
Phosphora isn't so much "evil" as "working for Viridi", who is more of a Knight Templar toward humanity. She even helps out with the Lightning Chariot later on.
"Funny Aneurysm" Moment: Throughout the entire game, Pit has been complaining about he wanted to fly longer than five minutes and isn't happy how he has to rely on someone else to give him the power of flight. The fact everyone mocks him for not being able to fly doesn't help. Then comes Chapter 21, where Pit flies longer than the given time in order to save Dark Pit from Chaos Kin. Palutena even pictures Pit talking about wanting to fly... yet his wings are burned up as a result of the heroic deed.
A particularly disturbing example in Chapter 2 is Palutena's joke about fried angel wings.
Wielding a club in the Reaper Fortress can cause a conversation to start regarding it, with Pit declaring how much fun it is too smash through things with it, his obvious relish in smashing things causing Palutena to remark that she needs to stay out of smashing range. Come Chapter 20, and a club becomes very impractical due to how difficult it is to use it against the Chaos Kin without hitting Palutena.
The Plutons are back! Thankfully, they're no longer invincible, and you can pick up the weapons they steal if you kill them.
Hilarious in Hindsight: During a tutorial conversation with Pit, Palutena mentions Super Smash Brothers and gets the name wrong (calling it "Super Bash Sisters"). This becomes more amusing not only for the fact that she was confirmed to be a playable character in the fourth game, but because said game has a greater degree of gender balance in its roster (counting female variants of certain characters).
Memetic Molester: It's not hard to think of the Chaos Kin as one given that the way it latches onto Palutena during battle and the way that it grabbed Dark Pit by the leg to throw him off the ledge and wrapping itself around him.
Petrified Palutena's idol description states the Chaos Kin tried to drag her into the Chaos Vortex with it, but she turned herself to stone at the last minute so that it could only escape with her soul.
The Orne. Besides the fact that this enemy will One-Hit Kill you if you touch it: an ominous 8-bit song plays when it's present, the screen shakes when it gets close, skulls pop out of its mouth whenever it screams, and according to its idol, anyone who touches it has their mind shattered before dying.
Palutena: You see, I'm tired of dealing with those pathetic humans, and I'm especially tired of dealing with you.
Scrappy Mechanic: Simply put, the controls in Uprising aren't designed for lefties in mind, though there is an option to use the Circle Pad Pro. Using the buttons does work fairly well, but it's clunkier and it doesn't help that one of the first things the game tells you to do is move in a circle.
The controls are one of Uprising's most cited problems. Some do prefer touchscreen aiming, though, and you get used to the controls very quickly regardless.
Also, the weapon fusion system. Not only is there no way to find weapons that have specific mods, but being able to create the weapon you want becomes a nightmare. At least the game will tell you what you'll get from fusing two weapons before you commit, but you won't know how the new weapon will fuse with others until it's made, and at that point you won't be able to get the originals back.
Additionally, according to the the Viridi Palm's idol, only someone who is completely devoted to Viridi can use it.
Equip that weapon and look closely (you might have to corner the camera against a wall). Remove the swirling petal aura, and Pit literally has Viridi's face tattooed on his arm. And a heart on the back of his hand. Make of that what you will.
Shocking Swerve: There are quite a few unexpected twists, such as Hades being the one behind everything, aliens with no allegiance to Hades or anyone else attacking the planet out of nowhere, Pyrrhon taking over the those aliens (and then another immediate one as they take over Pyrrhon), Pit getting trapped in the Ring of Chaos for three years, Palutena becoming brainwashed and becoming the enemy of mankind, Viridi picking up Palutena's slack and helping Pit despite being an enemy of mankind, Pandora returning to life and becoming an Action Girl, and the real Medusa not being dead after all. Whew.
Hades tries this on Pit in Chapter 23. When Pit calls him out on eating souls and removing them from existence, saying they can't move on or be reincarnated, Hades makes a pretty convincing argument on why reincarnation is no different than being removed from existence. Pit's reply is "I... uh... Eating souls isn't right!"
Also, trading weapon gems with a certain number of people. For some, it's really unlikely you'll be around another person with the game unless you participate in a convention where the chances of someone having Uprising in their 3DS is rather high for gem trading. This is why some gems are distributed by Palutena to make sure you can complete the achievement.
At least, they were. Nintendo distribution of weapon gems has been cancelled since March 31st, 2013. If you have intentions of completing the treasure hunt, don't even think about using those feathers on anything else.
Well, as of late 2013 you can use the "Home Pass" router setup trick to simulate meeting people with 3DSes, including receiving gems in particular.
Pretty much any achievement that requires you defeat a boss while in Crisis Mode due to the rather unusual oversight of not having a health meter for bosses. Especially if it's chapter 19 and one tries to unlock Centurion Orbitars.
Aurum Pyrrhon's ring of fire is one of his hardest attacks to avoid even when using the jump pad. Hope you brought Sky Jump or Jump Glide...
On higher difficulties, the Chaos Kin's bombs during the air segment certainly qualify, as they're difficult to shoot down, nearly impossible to avoid, can set you on fire, and are by far its most commonly used attack.
The Heart of Hades, the boss of the Womb Level, seems like a manageable boss considering it only uses two attacks: dropping mines with a small blast radius and forming a clone that explodes Bomberman-style. What makes it That One Boss is whenever it Turns Red. It becomes invincible and furiously rushes at you, which can only be avoided by dashing right into it. Just keeping an eye on it is difficult enough, but the real clincher is that it can still make clones in the middle of its rampage. And to top it all off, it uses this attack four times!
The Phoenix can be absolutely nasty for those using close ranged or heavy weapons, especially on higher difficulties. While its wind strikes are fairly easy to avoid, its fire breath and its flamming divebomb attack are not unless you're using a weapon light enough to run out of the way (or, in the latter case, can run to the jumppad in time), and they definitely pack a punch. Plus, because it spends most of the fight flying around the outskirts of the arena, it can be very difficult to hit unless it decides to hang around the center after its talon strike, which it rarely does.
The Aurum Core is a nightmare to fight on higher difficulties. First you have to deal with a rotating shield that will block your shots if you don't time them correctly. Then you have to worry about the cannons on the walls and the center of the room. Finally, when it Turns Red and stays red, the rest of the boss fight becomes a 3D Bullet Hell as it launches giant explosives that roll throughout the room, tries to suck you into the center, electrifies the walls, and even electrify the floor. All while you're still dealing with the previous hazards.
Aurum Pyrrhon can be tricky, as some players might not realize that you're supposed to attack the poles that he's chained to before attacking him directly, during which you won't be able to see any of his attacks due to their placement. What's more, some of his attacks hit hard and are tricky to avoid in time—especially his ring of fire.
The battle against Pit's body in chapter 18 is an absolute nightmare. Since you no longer have ranged weapons, you are forced to use melee attacks to defeat him and getting up to him is a difficult task in of itself. However, he does have ranged attacks that not only hit hard, but are rather difficult to dodge. Just getting close enough to attack is massive challenge, but being able to land one is also a serious challenge, as he is very quick and swift, requiring some very tricky maneuvering. The worst part is though, on higher difficulties, if your not careful, he can intercept your attacks. It's almost like fighting yourself.
Palutena in Chapter 20, mainly because you're supposed to attack the Chaos Kin, not her. In the beginning of the fight, the Chaos Kin hovers above in a very subtle purple smoke, and when revealed it will hover around Palutena or even wrap itself around her. Weapons like clubs or cannons won't be very effective given their power and broad range, making it very easy to hit or even kill Palutena by accident. Of course, this results in a Game Over.
Amazon Pandora is extremely agile, making her difficult to pin with ranged shots, and will deal out powerful counterattacks if you try and close in for melee. She also spams Pandora's boxes, which are incredibly easy to open by accident and release a stream of fairly powerful, difficult to dodge balls of energy. Though, on the plus side, they also often provide loot once the attack is over.
That One Level: Quite a few actually (keep in mind that the game's adjustable difficulty means you can avert this trope entirely).
Chapter 13 feels like one long marathon when it isn't. The air battle portion isn't difficult and neither is the boss at the end, but what makes it difficult is the fact that this level introduces some powerful enemies that can easily kill you if you're not careful. Plus, there are many holograms to distract you, and a tricky mirror room where if you move too quickly, you'll fall off the edge and lose a lot of health. Finally midway through the chapter, you're fighting Dark Pit who makes destroying the generator much harder given that he'll be aiming at you instead of the generator even if you decide to hide behind it hoping he'll shoot the arrow at it.
Chapter 17 for being an Escort Mission in a sense. If you lose all four Centurions carrying you toward Prryon, you get a game over and given that you're fighting on a small platform, barely having room to dodge enemies that are coming at you and that the Centurions die easily, you'll be screaming at higher levels.
Chapter 18 when you get to play as Magnus. On lower levels, it's fun, but when you rack up the difficulty level, the level suddenly becomes hell, as Magnus' lack of a ranged attack is the difference between a life and death situation. What's more, you can't use any powers, he's slower than Pit given the weapon he uses makes it harder for him to dodge, the modifiers are nulled till you get Pit's body back, and there are hardly any healing items in the level. And of course, if you try to go for the Souflee near the end, you might miss the hot spring before the boss battle (although you do get a Drink of the Gods).
Then the icing on the cake is the fight against Pit's body.
Chapter 19 is the Marathon Level where there are at least two checkpoints when climbing up the tower. It features some non-standard gameplay, including a section where you have to dash past a gust of wind three times on a catwalk. Fall and it's back to the start of the section. The catwalk isn't very narrow, which only makes it more infuriating until you get the hang of it. Likely worse for those using buttons\d-pad to move instead of analog (see Scrappy Mechanic).
Chapter 21 when you chase down the Chaos Kin, it's very difficult to stay alive during the air portion on higher levels given all the enemies the Chaos Kin throws at you. Plus, the air battle lasts longer than your average five minutes as lampshaded by Viridi when she keeps warning Pit that time is almost up. And just when you thought the hard part was done in the air you have to fight 13 sets of monsters that are from all the main armies in the game... and not only does the Chaos Kin choose the hardest monsters, he gives many of them different AI to make them even harder. Luckily, Dark Pit joins you around the ninth wave to help out, but at that point, you might have dropped a difficulty level. The Chaos Kin is hard to catch on foot, and unless you trap it, you'll likely be hitting Dark Pit instead of your intended target. And what's worse? He hits back. And to put a cherry on it, there's not one but TWO ways to fail the level instantly: not doing enough damage to the target in the final portion of the land battle, which is INCREDIBLY easy to fail if you're stuck with a weapon that lacks non-charged shot based ranged attacks, especially clubs, and failing to line up your crosshairs to save Dark Pit at the end of the level, which, while much more forgiving, is also the very last part of the chapter and failure ensures that completing this already Nintendo Hard level on higher difficulties was for nothing.
Chapter 24. It may be fun on lower intensities, but on high intensities like 9.0, it's just as bad as Chapter 18. This chapter has Pit doing the 3 trials Dyntos has set up for him. It involves Pit fighting the hardest enemies at this point in the game, with Advanced AI. You fight 3 bosses in the first section of the level(The Phoenix, The Kraken and Cragalanche). Then you fight Gaol and Magnus AT THE SAME TIME, and directly afterwards you have to fight fake Palutena who has the same powers as Palutena did in chapter 20, but is much more annoying and has some new attacks. And as if that wasn't enough, right after that you then have to fight the Great Sacred Treasure, which has one attack that even if you have a power that makes you invincible, will one hit KO you.
Woolseyism: Uprising's U.S. localization is up there with the Mario & Luigi series as one of their funnier, more self-aware localizations. The English dub is also a major step up from Nintendo's previous dubs, using mostly voice-acting veterans rather than newcomers.