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.
The Zekrom that Nobunaga uses. You hear its roar on the title screen, it accompanies the Big Bad throughout the main campaign, and much is made of the battle leading up to fighting it. Ultimately, it's not much more difficult an opponent than any other in the game, and its Warlord even replaces it in a subsequent fight!
Demonic Spiders: Anything with Dragon Rage if encountered while your Pokémon's levels are still low. Which, unlike in the main games, is actually quite likely during some of the extra chapters (Ieyasu, Mitsuhide, and Nouhime all have a pretty big problem with this seeing as they start right next to Dragnor). On the flip side, this makes Ranmaru (with his Dratini) a Disk One Nuke if you manage to recruit him early.
Ensemble Darkhorse: Besides the usual Masamune and Yukimura (that might be influenced by other games), you got Hanbei, Gracia, Okuni and Motonari are popular among the fans.
Epileptic Trees: There's fan theories floating around that the game is set in the past of the main series canon, and the individual nations are actually the regions of the main games, or will become them after a geological shift.
Fan-Preferred Couple: The male warlord/Oichi and Yukimura/female warlord are quite popular. The former might have to do with the male warlord looking similar to Nagamasa.
As mentioned above under Demonic Spiders, Dragon Rage. It deals 40 damage to everything, ignoring all typing, and can hit two targets at once, with the drawback of low accuracy. Not a problem thanks to many Warriors with abilities that give them an accuracy boost for three turns; catch them a Gible, Dratini, Deino or Axew, and they can easily sweep opponents for the first year or so of your story (at which point enemies become strong enough to survive a single hit). Many storylines with smaller world maps to conquer can be finished in a few months if you're lucky enough to get your hands on such Warriors early on.
A lot of the game's difficulty snaps cleanly in two if you load up your team with Pokémon that are Flying-type or have the Levitate ability. They're able to move across any type of terrain without being affected by it (meaning they can ignore poison bogs, ice, water, lava, pit traps, etc), can move over other Pokémon, can move over obstacles, can move over any land regardless of height, and can even move across empty tiles as long as they move to solid ground when you end their turn. This makes a good half the maps in the game become much easier with the superior maneuverability and immunity to many stage hazards this means. The "downside" of Flying-types and Levitate is that their terrain immunity means they can't hit switches, use underground tunnels, or rest in water to heal themselves. However, only a couple of maps have those features, and the advantages of Flying-types and Levitate far outweighs these minor negatives anyway.
The Guardian Charm equip item. It can be bought from the traveling merchant (who shows up infrequently) for 10,000 gold. It gives a significant boost to your Pokémon's stats if it's the only Pokémon remaining. While it was probably intended as a last hope if your army's been slaughtered, it makes it possible, and rather easy, to solo an entire enemy team 1-on-6. This makes late-game level grinding a breeze. And like everything else that merchant sells, it stays with you if you start a new chapter.
The Legendary Pokémon are hard to track down, but they are worth it. As you'd expect, they have high stats, long movement ranges, and powerful attacks which can hit multiple enemies at once. Give them the Guardian Charm, and they will redefine the phrase One-Man Army.
Genius Bonus: Rife with nods to real-life feudal Japan, naturally.
The Recurring Boss, Hideyoshi, is fought the second time as an assistant Warlord to Nene, the Poison-themed Warlord. While it is not mentioned in-game, him showing up for this one random battle out of the four available ones becomes a lot less random when you learn that Hideyoshi was Nene's husband in real life.
The first castle you conquer, Ignis, is ruled by a warlord specializing in Fire types. Ignis is Latin for "flame". Many of the other nations have Meaningful Names like this too.
Mitsuhide's special episode has him betraying Nobunaga, just like he did in real life. Furthermore, his specialty is Ice, which gives him an advantage against Nobunaga's Dragons, but a weakness to Fire-types; in real life, Mitsuhide was defeated by Hideyoshi, who in Conquest is a Fire-type user. Mitsuhide also has unique dialogue when engaging an enemy army with Nobunaga in it, shouting "Our enemy is in <kingdom>!" in reference to the real-life attack declaration his gave his troops to march on Nobunaga's stronghold.
Speaking of Hideyoshi and Nobunaga: Nobunaga's Legendary is Zekrom, while Hideyoshi gets Reshiram, allowing for a theme of the two uniters.
A more minor one but Masamune's appearance is Eyepatch of Power might seem like a generic look until you realize that Masamune in real life is blind in one eye hence why you never see his other eye. Might double as a Fridge Brilliance.
You can see the eyepatch if you look hard enough. It's more noticeable in certain animations though.
The conflict between the kids Mitsunari, Kiyomasa and Masanori make more sense when you realize the three of them did not get along in real life and spent most of their time fighting each other. Made worse when Hideyoshi died and their fight escalated and implied that Mitsunari won hence why you play his chapter first (and why he's got a freaking SCIZOR)
Hanbei is an ill boy based on his real life counterpart and as a result, his coughing fits make a lot more sense when you realize how he died in real life.
This also explains why he doesn't gain that much power.
Why does Shingen always carry a paper fan around? It's a reference to a legend stating that once, when Kenshin attacked him with a sword, Shingen used a paper fan to defend himself.
Ina's abilities always allow her to hit her target. In Samurai Warriors, she's the archer, so of course accuracy is important to her as well as judging the distance between her opponent.
At the end of Okuni's story, she disappears and is never heard from again. This is based on her her real life counterpart disappearing without a trace and no one knows what happened to her after that which leaves to speculation on how her life ended.
Oichi and No have the highest charisma when you have them in your army. It makes sense for No to have a high charisma given the type of person she is, but why does Oichi have a high charisma? In real life, Oichi was known for being the most beautiful woman in Japan (that could rival No) and everyone sought her out. Ironically Nobunaga thought she was too tall for a woman and dismissed her hence why in this game, he doesn't congratulate Oichi on winning the beauty contest contrast to Ranmaru. When promoted, Oichi has a higher charisma than No by one point implying that as much as No wants to think of herself as the most fairest of them all, the title will always go to Oichi.
This also explains why Okuni has the third highest charisma for female warlords. Like No, she's very manipulative and in order to get her male harem, she has to appeal to many men.
The various generic warriors are named after figures in Japanese history/Samurai Warriors games, with a interesting note being Dosetsu who has the same perfect link line as his leader, Ginchiyo. In history Dosetsu was the name of her father and he passed down his sword to her. Except in this case it's a mon preference.
Yes, Zubat are in this game, but they're not this trope due to only having one (fairly standard) move. Surprisingly, the trope is evoked not by Zubat, but by Sewaddle - specifically because Bug Bite devours any consumable item in this game, not just Berries. Say goodbye to all those Potions you just bought! You see a lot of them early-game too.
As in the main series, any wild Pokemon with Sturdy, giving them a Last Chance Hit Point if you land a killing blow when they have full HP. Naturally this makes fighting enemy Warriors with them a pain because you're on a time limit to defeat them so you can recruit them, and level grinding in areas where wild Pokemon with Sturdy appear is a further annoyance.
Many Pokemon have moves that let them dodge your attacks. There's always a variable that must be met for the chance for it to occur to happen, like attacks with claws, or they're attacked while on a particular terrain type. Still, it is intensely annoying for opponents to randomly dodge your attack, regardless of accuracy or power levels.
Any Pokemon or Warrior with a healing ability. There's nothing like getting a Pokemon down to single-digit HP, then their next turn comes and they heal themselves. "Spirit" is an ability distributed to several Pokemon that fully heals them and gives them an Attack boost when they're low on HP. It only works once, but once can be enough.
Goddamned Boss: Any Warrior with a Spiritomb. Since Spiritomb (this game being based on Gen V) has no weaknesses, you're bound by the "beat in four turns or without taking damage" rules if you want to recruit them. Hanzo happens to be one such Warrior, so you need to not only beat him according to these rules, but do it using a Warlord of your own.
Does anyone remember Team Rocket's old motto? Well...◊
Oichi could have easily put her brother Nobunaga in his place had this game was released after Gen VI with the inclusion of Fairy-types. And given this game limits everyone's moves to just one...
An old Urban Legend of Zelda for the main series games is that tapping the A button when throwing a Pokéball could increase the chances of catching the Pokémon successfully. Come this game, the linking process for Warriors getting new partners... consists of a rhythm-like minigame where you strategically tap A until the Pokémon submits to you.
Ho Yay: Between Nobunaga and Ranmaru as shown in Ranmaru's episode where Nobunaga doesn't seem to mind the idea of Ranmaru being labeled as a woman and came all the way from his nation just to graduate him on the title. It makes sense given that in real life, they did have a sexual relationship.
Padding: Some of the post-game episodes have you doing things like befriending 100 Pokémon as your only goal. Borders on Fake Longevity with some episodes being the same scenario as others, just with a Perspective Flip. (Though sometimes this is still enough to make for a very different experience, such as with Mitsuhide and Motochika's episodes).
The Scrappy: Many people don't like Yoshimoto given his appearance, the fact that he's the only historical character to get worse instead of better, his story serving no real plot to his character development and being a Joke Character when he promotes. In fact, he's the only character that doesn't Took a Level in Badass when he promotes as his special ability causes problems to others and his Fortress can only do 1 damage given that the move is Gyro Ball.
Scrappy Level: Spectra's arena is widely hated. There are purple flames that move every turn and, if they move onto your Pokemon (Which they will do if they can), inflict a random status condition. Additionally, each turn, the numerous Misdreavus statues slide around, and they have an annoying tendency to park themselves right in front of you or block you off from advancing toward the enemy entirely. As if that wasn't annoying enough, the actual animations for the flames' and statues' "turns" are long, meaning that it's a long, boring time before you can move again. It's not a particularly difficult map, just very tedious and annoying.
The Gabite warrior in the post game that shows up once the game thinks you're "too powerful" for the AI. The Gabite warrior goes to one or two random nations and tells them to fight harder drastically increasing the level of the warlords and warriors of that nation by a large amount. It wouldn't be a problem given your strongest team is probably a little lower than theirs but the computer always attacks the nation with a low level in order to get even stronger than you, so unless you have promoted warlords or full evolved Pokémon, whatever warlord got the boost will end up preventing you from completing the episode quickly. Also, for the low level team, pray that the nation they attack is a collect the flag nation given that if the enemy is too strong, you could always hold the line and gain points allowing your stronger army to defeat them.
Pokémon and Warriors are not registered in the Gallery until you use them in at least one battle. This isn't a big deal for Pokémon, because even if you, say, don't use your new Weavile in battle, the Warrior will have it in every subsequent storyline. Where this is a big deal is that it does not register Warlord transformations unless you use them in battle post-transformation, so if you go through all the trouble to get a Warlord to Rank 2, then end the storyline without using them, the game will not give you credit for the transformation, and in subsequent storylines they return in their base forms until you have to do it all over again to register them this time.
Technically, evolving registers Pokémon as seen. However, to register it as owned (and have full information on it), you need to use it in battle and then win.
Confusion. In main series, it just gives a chance for Pokémon to hit yourself (which seems to vary) but here? It seems that confused Pokémon sometimes will move on its own. If you're cornered (sometimes by damn confusion itself), it can as well do nothing, wasting its move.
That One Boss: Mitsuhide in the main story. Mostly due to the annoying Frictionless Ice you have to cross, which pretty much works like the Ice Path in Pokémon Gold and Silver except you can only move once per turn, and it makes getting into range of your attacks really difficult. Flying Pokémon can ignore the ice, but guess what they're weak to, and what every enemy uses... Oh, and one of the generic enemy warlords has a Munna with a nasty habit of putting all your Pokémon to sleep. The Munna is also levitating, so it ignores the ice. To top it all off, Mitsuhide himself is no slouch; his Lapras is decently bulky and is equipped with the Ice Beam (an attack that hits everything in a three-square line, has near-perfect accuracy, and is adequately powerful, to boot).
Ina and her Water/Ground-type Quagsire, by most cases. If you don't have a decent Grass type taking down her Quagsire can be a real pain (if you plan on recruiting her and do not have Motonari and his Grass-types, prepare to play around) especially given its not-to-be-sniffed-at Defenses. Also, its Ability reduces Range, and her Ability means that it won't miss.
Whichever Warlord gets a boost from the Gabite warrior in the post game becomes this especially when you're trying to unify Ransei.
Nobunaga starts with two powerful Dragon types in his army, inhabits the Dragon Kingdom and is one of the most aggressive AIs, meaning he can often conquer half of Ransei just as quickly as you can in the postgame. And he'll often recruit Warlords like Mitsuhide, Tadakatsu and Kenshin along the way.
You, the player, in any Warlord's episode that takes place chronologically after the main story. The hero(ine) is the only Warlord to maintain Rank II while controlled by the AI, which means that they also maintain their Rank II Warrior Skill, Courage. Put that on their unevolved Eeevee, and that's a two-stage Attack boost and a two-square Range boost on a four-square Range Pokémon with Celebrate, which allows you to move again if you KO a Pokémon. If you don't have any good allies, you can kiss your Game Breaker goodbye.
During the main story, Pugilis. Oichi even notes when you choose to attack that her Jigglypuff and your Eevee are weak to Fighting-type moves, and guess which two Warlords you need to take to every battle? Nintendo at least acknowledged the problem and included with the game the password to send Dratini flocking to a random kingdom under your command.
Kiyomasa and Masanori's episodes. When you play as Mitsunari, it's very easy because he has a Scizor that can destroy the competition easily. When you play as Kiyomasa though, you can't do that much damage to Mitsunari but can take out Masanori easily, but that means having to wait for a Pokémon with a fire move to defeat Scizor or at least have a warlord with a Pokémon that can resist Bug moves. Made worse with Masamori as he can't do that much damage to Kiyomasa and he can't even harm Mitsunari with his Skorupi and you'll have to wait around until you get a Pokemon that can even hope to harm Scizor. And they say the difficulty of their chapters is one?
Oichi's episode. Her army starts with Normal-type Pokémon. Her neighbors include No's Ghost-type faction, and Ranmaru's Dragon-type faction of Disc One Nukes.
Mitsuhide's episode. The usual postgame strategy of attacking an army and recruiting them into your ranks is out the door here, as all of Ransei save for the opposite corner of the map from Mitsuhide's start location is controlled by Nobunaga, so when you conquer his forts he'll just retreat his army somewhere else; said army by the way is stacked with a majority of the Warlords in the game, so not only are his forces strong, but your allies are mostly going to be limited to generic Warriors. And unlike other maps where you can take a few months to recruit more followers and bolster your numbers, in this scenario doing so makes things even harder; Mitsuhide's betrayal is a surprise attack in-story, so Nobunaga's best warriors are on the frontlines. But, once February hits, he'll rally his defenders to guard his flank properly. And the cherry on top: the story has a time limit of three years, so you can't fool around too much.
Masamune's level is intended to be difficult for those who jump into the level without leveling him or Magoichi up. He starts in Avia surrounded by Warlords that will either recruit quickly or have a type advantage over flying type. Conquering the top portion is difficult (but necessary to avoid the Gabite warrior and other aggressive AIs) because you're dealing with Misuhide (Ice), Ieyasu (Steel), Nobunaga (Dragon but it's mainly because of Ranmaru being a Disc One Nuke for him), No (Ghost and tends to recruit Warlords very quickly), Nene (Poison that can defeat Magoichi very easily), Ujiyasu (Rock) and Kenshin (Psychic but Aya has an ice Pokémon). The worse part is that Masamune can only promote in his chapter so you'll either be stuck with a Rufflet that can be defeated easily, or a Braivary that ends up taking two turns to attack (and can result in the failure of recruiting some Warriors).
Yoshimoto. Oh, by Alpha, Yoshimoto. Your objective is to recruit forty Warriors. Sure, Ujiyasu did the same thing a couple stories ago, but Yoshimoto has a tougher time of it thanks to his allies being weaker, his only neighors are difficult for his Bug-types to conquer, and he has less room to compete with Kenshin and Shingen for room and recruits.
That One Sidequest: Getting your Warlords to Rank 2 is time-consuming and there's a bit of Guide Dang It, but if you know the circumstances needed it isn't too hard for most of them... but there's exceptions.
Shingen needs a 75% link with his Perfect Link, which is one of the higher amounts. The major problem is that his Perfect Link is Rhyperior, who can only move two squares a turn, and its attack is Rock Wrecker, which hits one tile three squares away, is highly inaccurate, and oh yes, has a recharge turn. For most other Warlords, soloing a few rounds of wild Pokémon with the Guardian Charm on will get you up 10% or more. For Shingen and Rhyperior, it's a giant pain in the ass even with the Charm on. It's actually far easier to get him a Rhyhorn, grind its link level up without evolving it, then do so once it's at 75%.
Nene needs to have every Poison-type in the game registered in the gallery to upgrade. Better go get searching and grinding, it'll take a while.
Similarly, Noh needs every Ghost-type registered. Arguably even worse thanks to some ghost types requiring items to evolve. Items that can only be obtained through the merchant that shows up once in a blue moon.
They Wasted a Perfectly Good Plot: As told above under Genius Bonus, there's symbolism in Nobunaga getting Zekrom and Hideyoshi getting Reshiram, as the two uniters. However, it also begs the question of why Mitsuhide's Legendary is Articuno, when it would have been much more fitting thematically to give him Kyruem.