History YMMV / SuperRobotWarsUX

** [[MobileSuitGundamSEEDDestiny Shinn Asuka]], the pilot of [[FafnerInTheAzureDeadAggressor Fafner Mark Destiny]].[[note]]Post-''MobileGundamSEEDDestiny'' Shinn, who lost Stellar Louissier and Rey Za Burrel by canon, becomes a mentor figure to the ''Fafner'' cast in ''UX'', especially to Kazuki Makabe. Since ''SEED Destiny'' and ''Fafner'' has the same character designer, along with Shinn's SEED ability (which looks awfully akin to the assimilation effect for late-''Fafner'' Kazuki) and his Destiny Gundam, this makes him a perfect Festum buster like the Fafner pilots. It doesn't help that ''all'' events involving his Destiny Gundam (got damaged, receiving the repaired Destiny, and revealing his CombinationAttack with Lunamaria) in ''UX'' happened on Tatsumiyajima.[[/note]]
** [[spoiler:[[FafnerInTheAzureDeadAggressor Shou(ko) (Ha)zama]], the [[TheWingsOfRean female Aura Battler]]]].[[note]]If you fulfilled requirements to reacquire Shouko Hazama, after the sequence where she self-destructed to destroy the Festum in Scenario 13, she'll be brought to Byston Well (where the cast of ''UX'' are coming back ''from'') instead, and continue to fight for the people there, even being called a "female Aura Battler" (which is a sign to see if she's rescued or not). The kicker? Her name can be broken into that of the above, in line with that of Shou Zama, the male lead of ''Anime/AuraBattlerDunbine''.[[/note]]

** Scenario 47 "[[FafnerInTheAzureDeadAggressor Heaven and Earth]]": 70% of the map consists of water, which limits your options to air-based units and any units with a decent sea terrain adapability. This makes the red Festum ''much'' harder to deal via DemonicSpiders and, in the case of not having enough units adaptable at sea, a terrain bonus. Oh, and the reliable Kazuki and his Mark Sein? He won't show up until you lower Kurusu's HP enough.

** [[FafnerInTheAzureDeadAggressor Kenji Kondou's Mark Nacht]] gains EN +150 as a Full Upgrade Bonus, except it primarily uses ammo-based weapons, whereas [[FafnerInTheAzureDeadAggressor Mamoru Koudate's Mark Funf]] gets EN +50 and its attacks uses EN for a lot of things, such as a CombinationAttack that costs a plenty of EN. Naturally, you can see why it should be swapped around. Also, Kazuki's Level 3 "Assimilation" ability [[note]]When hit with an enemy attack, decrease enemy pilot's Will; when attacked and Will goes below a certain threshold, enemy will be absorbed and destroyed. Recover HP/EN; the effect increases the higher the pilot's Will[[/note]] in the Mark Sein can only be used against enemy Festum. While he ''could'' use it to assimilate AI-controlled enemy {{mook}}s such as Shamans and Banks from Tobikage, Kazuki doesn't want to assimilate humans, ELS and Vajra; the same applies to [[spoiler:Kurusu]] if you manage to recruit him, though by that time, there are no longer any Festum to assimilate.

** [[spoiler:[[FafnerInTheAzureDeadAggressor Shou(ko) (Ha)zama]], the [[TheWingsOfRean female Aura Battler]]]].[[note]]If you fulfilled requirements to reacquire Shouko Hazama, after the sequence where she self-destructed to destroy the Festum in Scenario 13, she'll be brought to Byston Well (where the cast of ''UX'' are coming back ''from'') instead, and continue to fight for the people there, even being called a "female Aura Battler" (which is a sign to see if she's rescued or not). The kicker? Her name can be broken into that of the above, in line with that of Shou Zama, the male lead of ''AuraBattlerDunbine''.[[/note]]

* BrokenBase
** Mostly regarding [[RegionCoding region locking]], {{Unexpected Character}}s, and the visual style of ''VideoGame/SuperRobotWarsL'', a BaseBreaker in its own right. Finally, the inclusion of DownloadableContent for a franchise that didn't have it until now.
** Part of it stems from the AnimatedAdaptation of ''{{Demonbane}}'' being used as opposed to the original VisualNovel, which many fans consider superior.
** Meanwhile, the Japanese fanbase isn't thrilled over how ''UX'' handled the crossover elements, though most opinions remain positive.

* CriticalResearchFailure: There's a TimeSkip of a few years between end of Arc Two and Arc Three. The text for the latter states it's been three months, and the only people who aged to Arc Three are the cast of ''FafnerInTheAzureDeadAggressor'' (except its {{Secret Character}}s). Sounds about right, except it ''should'' be three years because [[FafnerInTheAzureDeadAggressor Yumiko Toumi and Michio Hino's daughter Miwa]] is roughly 3 years-old; she couldn't have been born when/if Michio died. What went wrong? Notably, no one else aged at all during the game, despite years having passed, and this doesn't apply to [[Gundam00AwakeningOfTheTrailblazer Setsuna F. Seiei]] and the [[LinebarrelsOfIron Factors]], or any other non-human for that matter.
** Pay more attention to the dialogue: it's been mentioned that Miwa grows exceptionally fast in a few months because Michio had injected [[FafnerInTheAzureDeadAggressor Festum]] antibotics to pilot the Mark Eins, and these Festum cells are also inherited by her, altering her growth (which also happens in the movie, though that period is one year). Also, if Michio is alive, he'll comment that [[HeartwarmingMoments no matter what happens to Miwa, she's still his and Yumiko's daughter]], so it's not an intentional fault.
** Dialogue also states that Michio injects the Festum antibiotics after Yumiko has already been pregnant for a while, most likely since Scenario 26. Before the battle begins in Scenario 37, Michio has the Festum antibiotics injected because his Cynadetic Code matching with the Nothung Models has decreased due to age.

** Scenario 47 "[[FafnerInTheAzureDeadAggressor Heaven and Earth]]": 70% of the map consists of water, which limits your options to air-based units and any units with a decent sea terrain adapability. This makes the red Festum ''much'' harder to deal via DemonicSpiders and, in the case of not having enough units adaptable at sea, a terrain bonus. [[spoiler:If you want to save [[FafnerInTheAzureDeadAggressor Misao Kurusu]], all Fafner units must deploy, and each must fight him once, but only a few of them can deal with such a situation]]. Oh, and the reliable Kazuki and his Mark Sein? He won't show up until you lower Kurusu's HP enough.

** There's also a few game freezing bugs, such as one attack from [[BBSenshiSangokuden Ryofu Tallgeese]] and any allied unit counterattacking following an enemy attack. Also, by attacking [[{{Demonbane}} Master Therion]] with the [[{{BFS}} Shining Trapezohedron]] during the ''Demonbane'' finale, if he counterattacks with his own Shining Trapezohedron, the game will freeze (this may double as an EasterEgg because it's the result of the bad ending from the VisualNovel). During Scenario 34, if you use the Triple Dog attack after the Linebarrel changes into Amagatsu, the game will crash if you don't skip the battle animations; likewise in Scenario 43, the game will crash if battle animations are not skipped by using the Gim Gene All-Attack after [[{{Demonbane}} Nero]] deploys.

* TheyWastedAPerfectlyGoodPlot: Among other things, there's the ''Gundam 00'' cast not interacting much with the cast from ''BBSenshiSangokuden'', especially considering Setsuna's enthusiasm about "being Gundam".

* FetishFuel: [[spoiler: Kali Yuga]], by a sheer magnitude.

** Meanwhile, the Japanese fanbase isn't entirely thrilled over how ''UX'' handled the crossover elements, though most opinions remain positive.
* CompleteMonster: Thanks to his ManBehindTheMan status, [[NinjaSenshiTobikage Hazard Pasha]] has become worse than his canon counterpart. [[spoiler:Directly killing one of your teammates ''and'' indirectly causing a redeemable character to commit HeroicSacrifice pushed him way across the MoralEventHorizon]]. Hell, his actions makes [[{{Daimos}} Sakimori]] [[GeneralRipper Miwa]] look like ''a saint'', since at least Miwa ''is'' trying to protect the Earth rather than just personal gain.

** Jin Haganeya, the writer for ''Demonbane'', admitted on his Twitter feed his first use of that name was naming the Grungust when playing ''VideoGame/SuperRobotWars4'' as a kid.

** Prior to ''UX'', HikaruMidorikawa was a big proponent of wanting to see ''Demonbane'' in ''Super Robot Wars''. It helps he's the voice actor for Master Therion. Seems like someone at Banpresto listened...

** When you give a character the pilot skill "Foresight" [[hottip:*:Automatically cast the "Alert" Spirit Command each turn]] and pair them with an ally in a partner unit for the first time, at the start of the next scenario, Foresight will also activate on the other unit, though this only happens once. It can happen on subsequent playthroughs too, including any partner units that have been paired for a while. This particular bug seems to occur randomly.

** [[MobileSuitGundamSEEDDestiny Shinn Asuka]], the pilot of [[FafnerInTheAzureDeadAggressor Fafner Mark Destiny]].[[hottip:*:Post-''MobileGundamSEEDDestiny'' Shinn, who lost Stellar Louissier and Rey Za Burrel by canon, becomes a mentor figure to the ''Fafner'' cast in ''UX'', especially to Kazuki Makabe. Since ''SEED Destiny'' and ''Fafner'' has the same character designer, along with Shinn's SEED ability (which looks awfully akin to the assimilation effect for late-''Fafner'' Kazuki) and his Destiny Gundam, this makes him a perfect Festum buster like the Fafner pilots. It doesn't help that ''all'' events involving his Destiny Gundam (got damaged, receiving the repaired Destiny, and revealing his CombinationAttack with Lunamaria) in ''UX'' happened on Tatsumiyajima.]]
** [[spoiler:[[FafnerInTheAzureDeadAggressor Shou(ko) (Ha)zama]], the [[TheWingsOfRean female Aura Battler]]]].[[hottip:*:If you fulfilled requirements to reacquire Shouko Hazama, after the sequence where she self-destructed to destroy the Festum in Scenario 13, she'll be brought to Byston Well (where the cast of ''UX'' are coming back ''from'') instead, and continue to fight for the people there, even being called a "female Aura Battler" (which is a sign to see if she's rescued or not). The kicker? Her name can be broken into that of the above, in line with that of Shou Zama, the male lead of ''AuraBattlerDunbine''.]]

* ThatOneBoss: Don't let the [[HeroicSecondWind full recovery event]] fool you, but [[spoiler:Kali Yuga]] is probably one of the hardest bosses for [=SRW=] handhelds. First off, all of her attacks inflict status effects (one of which will halve your pilot's stats), meaning without someone like [[VideoGame/VirtualOn Fei-Yen HD]] using her Tactician Bonus "Spiritual Fortitude" [[hottip:*:Negate Spirit Point, stat and Will decrease and can still perform any action]], you're screwed. Second, due to most of your allied units' having a size rating from SS- to M- (with just a few being L-sized), [[spoiler:Kali Yuga]] towers with a size of ''3L'', which means dealing additional damage while receiving less in return. Combined with a list of pilot skills such as a max level "[[CriticalStatusBuff Prevail]]" [[hottip:*:The lower the HP, the greater the increase to accuracy/evasion/critical/armor stats]], "Guard" [[hottip:*:At 130 Will, -20% to damage received]] and "Counter" [[hottip:*:Chance of attacking first before the enemy strikes first]], alongside high armor and stats for everything, even if you fully commit Spirit Commands against her, without a high enough evasion rate, she can attack first via Counter and reduce your attackers' stats by half, rendering their attacks next to useless. The catch of the fight is that you have to fight another boss unit beforehand (which is no cakewalk, either) ''and'' you have to deal 30% damage to [[spoiler:Kali Yuga]] in order to trigger the recovery event. Of course, no [=SRW=] boss is unbeatable, but due to the gameplay structure of ''UX'' (no equippable parts and fewer Spirit Points for sub-pilots), even [[Characters/SuperRobotWarsZ Gaiou]] appears easier.

** The most well-known, but unexpected example happens on Scenario 23, "[[MacrossFrontier The False Songstress]]". This is your usual "defend a certain area" scenario (except half of the terrain is water) and it's mostly easy, until [[MacrossFrontier Ranka Lee]] is captured by a [[MacrossFrontier Hound Vajra]], adding the objective "reduce the Hound Vajra's HP to 10%". First off, it only has ''slightly'' better stats than other Vajra (it's one of the late-game {{mook}}s), so accidents do happen if one doesn't check its HP first (for example, Jin Hagane, the writer of ''Demonbane'', [[https://twitter.com/J_hagane/status/314305807334379520 had personally kicked Ranka to hell via an Atlantis Strike]]). Second, if you accidentally summon [[NinjaSenshiTobikage Tobikage]] to the field, due to its AI patterns, it'll directly go for that Hound Vajira and achieve a OneHitKO. Third, even if you don't summon the Tobikage, [[MacrossFrontier Brera Stern]], who is supposed to help you as an NPC, will do the same thing to Ranka if you don't act fast enough. This scenario is so frustrating it has created numerous new memes, like "Killing Ranka without mercy", "Victory Condition Thief" for Tobikage[[hottip:*:In addition to its infamy of stealing your credits, experience and conditions to unlock secrets]], and "Ranka Slayer" for Tobikage and Brera.

** Scenario 46 "[[KuroganeNoLinebarrel The Beautiful Dystopia]]": succeeding to land the Pretender on the designated area is a challenge itself, and after your reinforcements arrive and destroy some of the mass-produced Machinas, [[spoiler:the [[SuddenlyVoiced Deus ex Machina]]]] arrives and reduces all your allies' Will by 30 (except Kaidou and Magami, where they [[GoodBadBugs either gain +30 Will]], lose 20 or are unaffected). At this point, if you don't act fast enough, your units and battleships will be surrounded and destroyed due to the enemies' Will bonus. [[spoiler:Deus ex Machina]] also moves twice, has the "Over Ride" unit ability [[hottip:*:At 130+ Will, gain the effects of "High Speed Evasion". The activation rate is determined by the pilot's skill stat, with the "Special Evasion" rate reaching 40% at max. Does not cost EN, and all terrain during movement is ignored]], a MAP weapon and HP/EN regeneration.

** [[FafnerInTheAzureDeadAggressor Kenji Kondou's Mark Nacht]] gains EN +150 as a Full Upgrade Bonus, except it primarily uses ammo-based weapons, whereas [[FafnerInTheAzureDeadAggressor Mamoru Koudate's Mark Funf]] gets EN +50 and its attacks uses EN for a lot of things, such as a CombinationAttack that costs a plenty of EN. Naturally, you can see why it should be swapped around. Also, Kazuki's Level 3 "Assimilation" ability [[hottip:*:When hit with an enemy attack, decrease enemy pilot's Will; when attacked and Will goes below a certain threshold, enemy will be absorbed and destroyed. Recover HP/EN; the effect increases the higher the pilot's Will]] in the Mark Sein can only be used against enemy Festum. While he ''could'' use it to assimilate AI-controlled enemy {{mook}}s such as Shamans and Banks from Tobikage, Kazuki doesn't want to assimilate humans, ELS and Vajra; the same applies to [[spoiler:Kurusu]] if you manage to recruit him, though by that time, there are no longer any Festum to assimilate.
** Certain characters like [[LinebarrelsOfIron Miu]] have questionable Spirit Command sets: for her, she has "Strike" [[hottip:*:Gain perfect accuracy for one turn]], "Alert" [[hottip:*:Successfully evade the next attack]], "Accelerate" [[hottip:*:Increase pilot's movement range by three upon movement]], "Justice" [[hottip:*:Reduce EN, Magic Points, and ammo costs to zero for one turn]], and "Love" [[hottip:*:Gain the effects of the Accelerate, Strike, Alert, Valor, Spirit, Gain and Luck Spirit Commands for one turn]], yet the latter has the effects of the first three. Her Painkiller has EN+ as a Full Upgrade Bonus, even though "Justice" can render EN costs moot, as well as the Painkiller's "Super Full Upgrade Bonus" via achieving an Ace/Super Ace status of Mobility +5, which is basically useless since she has "Alert". Finally, the Painkiller only has small HP regeneration compared to the [[LinebarrelsOfIron Hind Kind]] and Deceive. This could be a very strong case of {{Nerf}}.

** Mostly regarding [[RegionCoding region locking]], {{Unexpected Character}}s, and the visual style of ''SuperRobotWarsL'', a BaseBreaker in its own right. Finally, the inclusion of DownloadableContent for a franchise that didn't have it until now.

** Jin Haganeya, the writer for ''Demonbane'', admitted on his Twitter feed his first use of that name was naming the Grungust when playing ''SuperRobotWars4'' as a kid.

** The potential exists to flip the odds as like ''SuperRobotWarsK'', there's no pilot skill slot limitations, just a matter of how many "Skill Parts" you have. With enough playthroughs, you can turn a single unit into a OneManArmy.

** Prior to ''UX'', HikaruMidorikawa was a big proponent of wanting to see ''Demonbane'' in ''Super Robot Wars''. It helps he's the voice actor for Master Therion. Seems like someone at NamcoBandai listened...

* FixFic: Granted this is YMmV so there could be others who disagree. This refers mostly to the ''Gundam00'' movie's story. During the story Mr. Bushido can be saved from dying in combat. Setsuna does not join ELS meaning he will not be separated from the people he loves for five decades.

** Part of it stems from the AnimatedAdaptation of ''{{Demonbane}}'' being used as opposed to the original VisualNovel, which many fans consider superior. Note the original work ''is'' an R-18; logically speaking, Banpresto would have to use the "'less" offensive one.

* FixFic: Granted this is YMNV so there could be others who disagree. This refers mostly to the ''Gundam00'' movie's story. During the story Mr. Bushido can be saved from dying in combat. Setsuna does not join ELS meaning he will not be separated from the people he loves for five decades.

* GameBreaker: One of the reason for major bosses to have the "All-Canceller" ability [[hottip:*:Negate all status effects inflicted from weapons]] is probably because of the [[LinebarrelsOfIron Deceive]], an L-sized double-seater with the "Nerve Crack" ability [[hottip:*:At 120 Will, for one turn, debuff an enemy stats by 15 and buff an ally stats by 15. Can be used post-movement and effects and stack]] and renders anyone without "All Canceller" helpless. It's not a second-tier unit either, as it's a resupply unit with decent support-based Spirit Commands, meaning it can stay in frontline combat with the attackers.
** [[BBSenshiSangokuden Koumei Re-GZ]] has a "Tactician Bonus" that is simply fantastic. Initially, he provides a [[StatusBuff 10% damage buff on your turn]], but after Scenario 22, all allied units gain "Ignore Size Modifier" [[hottip:*:No accuracy or damage penalties incurred when attacking a unit of a different size]] and post-Scenario 37, all allied units' terrain adaptation will increase by one rank. Bruising through the late-game with such an overwhelming force can be satisfying for some. However, since some of the secrets involve an alternative Tactician Bonus, excessive use of Koumei will result in not getting quite the amount of secrets.
** When [[FafnerInTheAzure Soushi Minashiro]] returns in Scenario 47, his Tactician Bonus is "Negate Continuous Target", allowing all allied units to not suffer from decreased evasion rates when targeted.

* CompleteMonster: Thanks to his ManBehindTheMan status, [[NinjaSenshiTobikage Hazard Pasha]] has become worse than his canon counterpart. [[spoiler:Directly killing one of your teammates ''and'' indirectly causing a redeemable character to commit HeroicSacrifice pushed him way across the MoralEventHorizon]]. Hell, his actions makes [[{{Daimos}} Miwa]] [[GeneralRipper Sakimori]] look like ''a saint'', since at least Miwa ''is'' trying to protect the Earth rather than just personal gain.

* ThatOneBoss: Don't let the [[HeroicSecondWind full recovery event]] fool you, but [[spoiler:Kali Yuga]] is probably one of the hardest bosses for [=SRW=] handhelds. First off, all of her attacks inflict status effects (one of which will halve your pilot's stats), meaning without someone like [[VirtualOn Fei-Yen HD]] using her Tactician Bonus "Spiritual Fortitude" [[hottip:*:Negate Spirit Point, stat and Will decrease and can still perform any action]], you're screwed. Second, due to most of your allied units' having a size rating from SS- to M- (with just a few being L-sized), [[spoiler:Kali Yuga]] towers with a size of ''3L'', which means dealing additional damage while receiving less in return. Combined with a list of pilot skills such as a max level "[[CriticalStatusBuff Prevail]]" [[hottip:*:The lower the HP, the greater the increase to accuracy/evasion/critical/armor stats]], "Guard" [[hottip:*:At 130 Will, -20% to damage received]] and "Counter" [[hottip:*:Chance of attacking first before the enemy strikes first]], alongside high armor and stats for everything, even if you fully commit Spirit Commands against her, without a high enough evasion rate, she can attack first via Counter and reduce your attackers' stats by half, rendering their attacks next to useless. The catch of the fight is that you have to fight another boss unit beforehand (which is no cakewalk, either) ''and'' you have to deal 30% damage to [[spoiler:Kali Yuga]] in order to trigger the recovery event. Of course, no [=SRW=] boss is unbeatable, but due to the gameplay structure of ''UX'' (no equippable parts and fewer Spirit Points for sub-pilots), even [[Characters/SuperRobotWarsZ Gaiou]] appears easier.

** Soushi's Spirit Points will sometimes become infinite and no matter how much you cast his Spirit Commands during a scenario, he won't lose any. Also if you cast Spirit Commands on both Fafner PU from Soushi, he will only lose SP worth 1 cast.

** Soushi's Spirit Points will sometimes become infinite and no matter how much you cast his Spirit Commands during a scenario, he won't lose any.

** As a footnote though, the design philosophy of the partner systems in ''UX'' (and by extension, ''L'') is to urge players to use usually-unused units in their teams, as less powerful units will have a better bonus, not to mention that draing EN from weapons is increased by a sheer amount since ''L'' to discourage a OneManArmy.

** On the first playthrough, once the Deus Ex Machina reveals itself, all characters except [[MazinkaiserSKL Kaidou and Magami]] get a reduction in Will; instead, these two gain +30 Will. This occurs if you Wing Cross before Deus Ex Machina deploys.

** Dialogue also states that Michio injects the Festum antibiotics after Yumiko has already been pregnant for a while, most likely since Scenario 26. Before the battle begins in Scenario 37, Michio has the Festum antibiotics injected because his Cynadetic Code matching with the Mark Eins has decreased due to age.

* ThatOneBoss: Don't let the [[HeroicSecondWind full recovery event]] fool you, but [[spoiler:Kali Yuga]] is probably one of the hardest bosses for [=SRW=] handhelds. First off, all of her attacks inflict status effects (one of which will halve your pilot's stats), meaning without someone like [[VirtualOn Fei-Yen HD]] using her Tactician Bonus "Spiritual Fortitude" [[hottip:*:Negate Spirit Point, stat and Will decrease and can still perform any action]], you're screwed. Second, due to most of your allied units' having a size rating from SS- to M- (with just a few being L-sized), [[spoiler:Kali Yuga]] towers with a size of ''3L'', which means dealing additional damage while receiving less in return. Combined with a list of pilot skills such as a max level "[[CriticalStatusBuff Prevail]]" [[hottip:*:The lower the HP, the greater the increase to accuracy/evasion/critical/armor stats]], "Guard" [[hottip:*:At 130 Will, -20% to damage received]] and "Counter" [[hottip:*:Chance of attacking first before the enemy strikes first]], alongside high armor and stats for everything, even if you fully commit Spirit Commands against her, without a high enough evasion rate, she can attack first via Counter and reduce your attackers' stats by half, rendering their attacks next to useless. The catch of the fight is that you have to fight another boss unit beforehand (which is no cakewalk, either) ''and'' you have to deal 30% damage to [[spoiler:Kali Yuga]] in order to trigger the recovery event. Of course, no [=SRW=] boss is far from unbeatable, but due to the gameplay structure of ''UX'' (no equippable parts and fewer Spirit Points for sub-pilots), even [[Characters/SuperRobotWarsZ Gaiou]] appears easier.

** The most well-known, but unexpected example happens on Scenario 23, "[[MacrossFrontier The False Songstress]]". This is your usual "defend a certain area" scenario (except half of the terrain is water) and it's mostly easy, until [[MacrossFrontier Ranka Lee]] is captured by a [[MacrossFrontier Hound Vajra]], adding the objective "reduce the Hound Vajra's HP to 10%". First off, it only has ''slightly'' better stats than other Vajra (it's one of the late-game {{mook}}s). Second, if you accidentally summon [[NinjaSenshiTobikage Tobikage]] to the field, due to its AI patterns, it'll directly go for that Hound Vajira and achieve a OneHitKO. Third, even if you don't summon the Tobikage, [[MacrossFrontier Brera Stern]], who is supposed to help you as an NPC, will do the same thing to Ranka if you don't act fast enough. This scenario is so frustrating it has created numerous new memes, like "Killing Ranka without mercy", "Victory Condition Thief" for Tobikage[[hottip:*:In addition to its infamy of stealing your credits, experience and conditions to unlock secrets]], and "Ranka Slayer" for Tobikage and Brera.
*** Except Brera can't deal enough damage in one hit, and the Hound Vajra has a defensive barrier. Even if you leave it to Brera, he will lower the Hound Vajra's HP below 10% himself with the pattern he uses. Still, two problems exist: Brera's strongest attack is capable of destroying the Hound Vajra in two hits, and because Brera comes with boss-like stats, the Hound Vajira will also target him (again due to the AI) if he's in range, thus the situation isn't much better. Let's not take into account for chances of landing critical hits...
** Scenario 46 "[[KuroganeNoLinebarrel The Beautiful Dystopia]]": succeeding to land the Pretender on the designated area is a challenge itself, and after your reinforcements arrive and destroy some of the mass-produced Machinas, [[spoiler:the [[SuddenlyVoiced Deus ex Machina]]]] arrives and reduces all your allies' Will by 30 (except Kaidou and Magami, where they [[GoodBadBugs either gain +30 Will]], lose 20 or are unaffected). At this point, if you don't act fast enough, your units and battleships will be surrounded and destroyed due to the enemies' Will bonus. [[spoiler:Deus ex Machina]] also moves twice, has the "Over Raid" unit ability [[hottip:*:At 130+ Will, gain the effects of "High Speed Evasion". The activation rate is determined by the pilot's skill stat, with the "Special Evasion" rate reaching 40% at max. Does not cost EN, and all terrain during movement is ignored]], a MAP weapon and HP/EN regeneration.

** [[FafnerInTheAzureDeadAggressor Kenji Kondou's Mark Nacht]] gains EN +150 as a Full Upgrade Bonus, except it primarily uses ammo-based weapons, whereas [[FafnerInTheAzureDeadAggressor Mamoru Koudate's Mark Funf]] gets EN +50 and its attacks uses EN for a lot of things, such as a CombinationAttack that costs a plenty of EN. Naturally, you can see why it should be swapped around. Also, Kazuki's Level 3 "Assimilation" ability [[hottip:*:When hit with an enemy attack, decrease enemy pilot's Will; when attacked and Will goes below a certain threshold, enemy will be absorbed and destroyed. Recover HP/EN; the effect increases the higher the pilot's Will]] in the Mark Sein can only be used against enemy Festum. While he ''could'' use it to assimilate AI-controlled enemy {{mook}}s, Kazuki doesn't want to assimilate humans, ELS and Vajra; the same applies to [[spoiler:Kurusu]] if you manage to recruit him, though by that time, there are no longer any Festum to assimilate.

** [[FafnerInTheAzureDeadAggressor Kenji Kondou's Mark Nacht]] gains EN +150 as a Full Upgrade Bonus, except it primarily uses ammo-based weapons, whereas [[FafnerInTheAzureDeadAggressor Mamoru Koudate's Mark Funf]] gets EN +50 and its attacks uses EN for a lot of things, such as a CombinationAttack that costs a plenty of EN. Naturally, you can see why it should be swapped around. Also, Kazuki's Level 3 "Assimilation" ability [[hottip:*:When hit with an enemy attack, decrease enemy pilot's Will; when attacked and Will goes below a certain threshold, enemy will be absorbed and destroyed. Recover HP/EN; the effect increases the higher the pilot's Will]] in the Mark Sein can only be used against enemy Festum. While he ''can'' use it to assimilate AI-controlled enemy {{mook}}s, Kazuki doesn't want to assimilate humans, ELS and Vajra; the same applies to [[spoiler:Kurusu]] if you manage to recruit him, though by that time, there are no longer any Festum to assimilate.

** [[FafnerInTheAzureDeadAggressor Kenji Kondou's Mark Nicht]] gains EN +150 as a Full Upgrade Bonus, except it primarily uses ammo-based weapons, whereas [[FafnerInTheAzureDeadAggressor Mamoru Koudate's Mark Funf]] gets EN +50 and its attacks uses EN for a lot of things, such as a CombinationAttack that costs a plenty of EN. Naturally, you can see why it should be swapped around. Also, Kazuki's Level 3 "Assimilation" ability [[hottip:*:When hit with an enemy attack, decrease enemy pilot's Will; when attacked and Will goes below a certain threshold, enemy will be absorbed and destroyed. Recover HP/EN; the effect increases the higher the pilot's Will]] in the Mark Sein can only be used against enemy Festum. While he ''can'' use it to assimilate AI-controlled enemy {{mook}}s, Kazuki doesn't want to assimilate humans, ELS and Vajra; the same applies to [[spoiler:Kurusu]] if you manage to recruit him, though by that time, there are no longer any Festum to assimilate.

* AccidentalInnuendo: From [[spoiler: Kali Yuga]], of all things. One of her battle quotes is "All will be within my breast."

** Part of it stems from the AnimatedAdaptation of ''{{Demonbane}}'' being used as opposed to the original VisualNovel, which many fans consider superior. Note, however, the original work ''is'' an R-18; logically speaking, Banpresto would have to use the "'less" offensive one.

* CompleteMonster: Thanks to his ManBehindTheMan status, [[NinjaSenshiTobikage Hazard Pasha]] has become worse than his canon counterpart. [[spoiler:Directly killing one of your teammates ''and'' indirectly causing a redeemable character to commit HeroicSacrifice pushed him way across the MoralEventHorizon.]] Hell, his actions makes [[GeneralRipper Sakimori Miwa]] from ''Daimos'' look like ''a saint'', at least Miwa ''is'' trying to protect the Earth rather than just personal gain.
* CriticalResearchFailure: There's a time skip of a few years between end of Arc 2 and 3, and beginning of Arc 3, and the text for Arc 3 says it's been three months. The only people who aged to Arc 3 are Fafner people (except Fafner secret characters), the proof that it's been 3 years is because Yumiko and Michio's daughter is already 3-4 years old; while she wasn't even born when/if Michio died. So what went wrong? Notably nobody else aged at all during the game even though years have passed, this doesn't apply to Setsuna and the Factors, or any other non-human though.
** Pay more attention to the dialogues: it's been mentioned that Miwa (the ''Fafner'' girl in question) grows exceptionally fast in a few months because Michio had injected Festum antibotics to pilot Mark Ein, and these Festum cells are also inherited by her, altering her growth (Which also happens in the movie, though that period is one year). Also, if Michio is alive, he'll comment that [[HeartwarmingMoments no matter what happens to Miwa, she's still his and Yumiko's daughter]], so it's not an intentional fault.
** Dialogue states that Michio injects Festum antibiotics after Yumiko has already been pregnant for a while. She had been impregnated since chapter 26 most likely, and in chapter 37 before the battle begins, Michio has the Festum antibiotics injected because his Cynadetic Code match with Nothung Model Fafners has decreased due to age.
** Chapter 41 dialogue states that Miwa grows rapidly because both her parents had Festum genes in them, just like Kazuki and the other kids do. Being the first natural born child for years, it goes to say Kazuki and the others were produced in a laboratory and adopted by the adults of the Island. Unless both parents also had Festum gene to begin with.
* DemonicSpiders:
** Any [[FafnerInTheAzureDeadAggressor Festum]] successfully hitting an allied unit drops the pilot's Will and armor value. While these StandardStatusEffects aren't such a big problem, the "demonic" part lies with all Festum units having an ability that grants them greater accuracy and evasion rates against ''non-Fafner units'' (and Heroman).
** Individually, [[Gundam00AwakeningOfTheTrailblazer ELS]] units aren't strong, but they come in large numbers. Alongside dealing normal damage to HP, they also absorb EN, at a minimum of 10% per attack. ''UX'' treats the case that if any unit's EN is rendered to zero by ELS, it is automatically destroyed.

* GameBreaker: One of the reason for major bosses to have All Canceller is probably because of [[LinebarrelsOfIron Deceive]]. It's a L-sized double-seater with Nerve Crack (which can reduce enemy stats ''by half'') which renders anyone without All Cancellers helpless. It's not a second-tier unit either, as it's a resupply unit (so it can provide EN regeneration to the teammate) with decent support Seishins, meaning it can stay in frontline combat with your attackers.
** [[BBSenshiSangokuden Koumei Re-GZ]] as Tactician Bonus is simply fantastic. Initially he provides a damage buff on your turn, after Stage 22 your units' attacks ignore Size Differences, and after Stage 37 ''ALL'' your units' terrain adaptation will increase by one rank, which basically means '''90%''' of them will become S Rank. Bruising through late-game with such overwhelming force can be satisfying for some. However, since some of the secrets involve an alternative Tactician Bonus, excessive use of Koumei will result in not getting quite an amount of secrets.
** [[FafnerInTheAzure Minashiro Soushi]] as tactician when he rejoins in chapter 47 he learns his Negate Continuous Target, all your units will not suffer from lowered evasion rate when being targeted.
* GeniusBonus:

* GoodBadBugs: UX has a plenty, such as if you bench a character for 2 maps and put them back in and make one kill; the kill is multiplied into over 50 (the amount decreases over tries). Also on later playthroughs, killcounts are naturally multiplied, making it hard to keep track how many kills you need for secret characters (unless you keep memo of each).
** There's also few game freezing bugs, such as one of Ryofu Tallgeeses's attacks. One where you evade an enemy attack and counterattack back the game might freeze for a moment, possibly no danger of game crashing though. And last if you attack Master Therion with Shining Trapezohedron in the Demonbane finale, if he counterattacks with his Shining Trapezohedron the game will freeze; this can double as Easter Egg because it's the bad result of the Visual Novel. During Chapter 34 if you use Triple Dog after Linebarrel changes into Amagatsu the game will crash if you don't skip animations. In Chapter 43 if you use Gim Genen All-Attack after Nero deploys the game will crash if you don't skip animations.
** On 1st playthrough when Deus Ex Machina reveals to UX their battles only bring the destruction of the world closer, everybody else except Kaidou and Magami lose their Morale/Willpower. Actually, Kaidou and Magami get +30 Willpower instead of losing any at all. This happens if you Wing Cross before Deus Ex Machina deploys.
** When you give a pilot the Skill Foresight which casts Flash each own phase and pair them up with somebody for the first time; at the start of the next map the Foresight casts Flash on the other unit too, this happens only once. It can happen on later playthroughs too, as well as PU's that have been paired for a while, it seems to have a bit random pattern.
** Soushi's SP sometimes becomes infinite and no matter how much you cast his Spirit Commands that map, he won't lose any.
** Sometimes when you restart map and used Ruri for tactician before and set somebody else as tactician who is somebody's sub-pilot or even main pilot, their SP will be +20 from Ruri's tactician effect; this effect stops when you cast one Spirit Command, their SP will return to normal then.
** Foresight Skill casts Flash each Player Phase on the unit which's pilot has it, there is no limit to this (except if Flash hasn't been used up), but mysteriously it might stop casting it at some point even though it should still continue.
** After 2nd playthrough you seemingly stop gaining experience from shooting down both units in a pair, so don't wonder if you're gaining levels way less than before. This also applies to Map attacks, you can only gain experience from one enemy shot down.
** There's also a level scale bug, if Arnie or any Event Deploy unit's pilot is paired up with somebody who is lower level, the enemies will scale to the lower level pair unit's pilot's level. This also applies to characters who join.
* HilariousInHindsight:

* MemeticMutation:
** [[GundamSeedDestiny Shinn Asuka]], the pilot of [[FafnerInTheAzureDeadAggressor Fafner Mark Destiny]].[[labelnote:*]]Post-''Gundam SEED Destiny'' Shinn, who lost Stellar Louissier and Rey Za Burrel by canon, becomes a mentor figure to the ''Fafner'' cast in ''UX'', especially to Kazuki. Since ''SEED Destiny'' and ''Fafner'' has the same character designer, along with Shinn's SEED ability (which looks awfully akin to the assimilation effect for late-''Fafner'' Kazuki) and his Destiny Gundam, this makes a perfect Festum buster like the fellow Fafner pilots. Doesn't help that ''all'' events involving his Destiny Gundam (got damaged, receiving the repaired Destiny, and revealing his CombinationAttack with Lunamaria) in ''UX'' happened on Tatsumiyajima.[[/labelnote]]
** [[spoiler:[[FafnerInTheAzureDeadAggressor Shou(ko) (Ha)zama]], the [[TheWingsOfRean female Aura Battler]]]].[[labelnote:spoiler alert]]If you fulfilled requirements to reacquire Shouko Hazama, after the sequence where she self-destructed to destroy the Festum in Scenario 13, she'll be brought to Byston Well (where the cast of ''UX'' are are coming back ''from'') instead, and continue to fight for the people there, even being called a "female Aura Battler" (which is a sign to see if she's rescued or not). The kicker? Her name can be broken into that of the above, in line with that of Shou Zama, the male lead of ''AuraBattlerDunbine''.[[/labelnote]]
* TheyWastedAPerfectlyGoodPlot: Among other things, there's the ''Gundam00'' cast not interacting much with the one from ''BBSenshiSangokuden'', especially considering Setsuna F. Seiei's enthusiasm about "being Gundam".
** Setsuna has matured since the second season, moreso in the movie, and Lockon Stratos does {{lampshade}} the fact that "Setsuna can't call himself Gundam again" when they first met.
* ThatOneBoss: Don't let the [[HeroicSecondWind full recovery event]] fool you, [[spoiler:Kali Yuga]] is probably one of the hardest boss in handheld SRW history. First off, all of her attacks have status effects (one of her attacks will halve your pilot's stats), so if you don't use anyone who can do Pilot Block (Mental Fortitude) and Robot Block (Spec Decrease Negate) as Tactical Command (thus the best to use will be Fei-Yen), you're screwed. Second, when most of your units in this game ranks among SS to M size (with just a few L-sized), [[spoiler:Kali Yuga]] towers with a size of ''3L'', which means she'll do additional damage while receiving less in return. Combined with her list of Prevail Lv9, Guard, high armor, high stats for everything ''and'' Counter, even if you fully commit Seishin commands, without Evade she can counter your attack and reduces your attackers' stats by half, rendering their attacks next to useless. The catch of the fight is that you have to fight another boss unit beforehand (which is no cakewalk either) ''and'' you have to deal 30% damage to [[spoiler:Kali Yuga]] in order to trigger the recovery event. She is far from unbeatable, but due to the system structure (including "no Enhancement Parts" and lesser Seishin points for subpilots), Gaiou from ''Saisei-hen'' is probably easier than this.
** The potential exists to flip the odds as unlike the Z2 games, there's no limits for skills, just a matter of how many skill parts you have. After enough play-throughs (or cheating), you can turn units into nigh-gods.
* ThatOneLevel: Although stages in ''UX'' are more forgiving than ''L'', it also has quite an amount of crazy stages, especially late game.
** The most well-known but unexpected ThatOneLevel happens on Stage 23, ''[[MacrossFrontier The False Songstress]]''. This is your usual "defend a certain area" mission (except half of the field is a sea), and it's mostly easy......Until Ranka Lee was captured by a Hound Vajira and the objective "reduce Hound Vajra's HP to 10%" is added. First off, it only has ''slightly'' better stats than other Vajiras (it's one of the late-game grunts), so accidents may happen for those unnoticed. Second, if you accidentally summon [[NinjaSenshiTobikage Tobikage]] to the field, due to the AI patterns, it'll ''directly go for that Hound Vajira and kill it in one hit!'' Third, ''even'' you don't summon Tobikage, [[MacrossFrontier Brera Stein]], who is supposed to help you as an NPC, ''will do the same thing to Ranka if you don't act fast enough''. This stage is so frustrating to the point that it has created numerous new memes, like "Killing Ranka without mercy", "Victory Condition Thief" for Tobikage[[labelnote:*]]In addition to its infamy of stealing your cash, experience and secret conditions[[/labelnote]], and "Ranka Slayer" for both Tobikage and Brera.
*** Except Brera can't really hit enough damage in one hit, and the Hound Vajra has Energy Field so if you leave it to Brera, he will lower the Hound Vajra's HP below 10% himself with the pattern he uses. Two problems do exist though: First, Brera's strongest attack, even the Hound Vajira has an Energy Field, is capable to kill it in two hits. Second, because Brera comes with a boss-like stat, the Hound Vajira will also target him (again because of the AI pattern) if he's in range, so the situation isn't much better. And let's not account for chances of Critical Hits......
** Stage 46, [[KuroganeNoLinebarrel The Beautiful Dystopia]]. Succeeding to land Pretender on the designated grid is one challenge in itself, and after your reinforcements arrive and kick some Mass-Produced Machinas' butt, [[spoiler:[[SuddenlyVoiced Deus ex Machina]]]] will pop out and reduce all your units' will by 30 (except Kaidou and Magami, they will either gain +30 Will, lose only 20 or be completely unaffected). At this point if you don't act fast enough, your units and battleships will be surrounded and being slapped to death due to the enemies' Will bonus. [[spoiler:Deus ex Machina]] also moves twice, has Override, a MAP weapon and HP/EN recovery. Have fun.
** The next stage, [[FafnerInTheAzureDeadAggressor Heaven and Earth]] is also insanely frustrating, as 70% of the stage consist of water terrain, which limits your options to Air units and units with Sea Adaptation. Which make those red Festum ''much'' harder to deal with due to their ability and, in case of not having enough units for Sea Adaptation, terrain bonus. [[spoiler:If you want to save Kurusu, ''all'' Fafner units must deploy, and each must fight him once, but only a few of them can deal with such situation.]] Oh, and your reliable Festum buster, Kazuki and his Mark Sein? He won't show up until you beat up Kurusu enough.
** In Stage 48 we deal up the last of the [[Gundam00AWakeningOfTheTrailblazer ELS]]. As mentioned in DemonicSpiders, lots of ELS means big problem to your units, and now they come ''without limits''. You think ELS is your only problem? [[NinjaSenshiTobikage Zerokage]] will also pop up with his force, probably enough to distract you. ''And'' all those big bad ELS twin units around the designated area after Setsuna arrive. All in the meantime, you have to be cautious that random ELS may race down to the south edge of the map, or gangs of ELS suck up all EN from one of your battleships, ''while'' you have five turns to send Setsuna to the designated point. Talk about a race against time and a war of attrition.
* TierInducedScrappy: Some Full Upgrade and Ace Bonuses for mechas are quite weird
** Kenji's Mark Nacht gaining EN+150 while it mainly uses bullets, where in Mamoru's Mark Funf gets EN+50 and it uses EN for a lot of things; they do have Combination Attack that costs a plenty of EN. But you can see why it should be swapped around. Also Kazuki's Assimilation Lv3 when in Mark Sein is only used against Festum, while he could use it to assimilate AI controlled enemy mooks since he doesn't want to assimilate humans, ELS and Vajra, same applies to Kurusu if you manage to recruit him; as by that time there are no longer Festum as enemies to assimilate.
** Also people like Miu from Linebarrels has a pathetic Spirit Command set such as learning only Strike, Flash, Accel, Justice and Love while Love does the first three in one, Painkiller has EN+ for Full Upgrade Bonus even though Miu's Justice reduces EN cost to zero for one turn, as well as Painkiller's Super Full Upgrade Bonus with ACE/Super Ace adds up Mobility +5 to it which is basically useless because she knows Flash alone to avoid one attack from an enemy (or enemy PU), also Painkiller only has 10% HP recover from damage taken like Hind Kind and Deceive; this is a very strong case of Nerf as well.
** Setsuna's Qan[t] uses EN for everything and the EN costs aren't even a joke; sure it has 25% EN regen but that's not really enough, this is strongly noticeable during DLC Campaign Maps where you have no upgrades. Lockon's Zabanya (and Zabanya Full Equip after their movies's finale) also uses EN for majority of the stronger attacks while he was originally a sniper this is probably to be expected, but he does not learn Justice so you can't really mass use him then. But Setsuna and Lockon are still the ones in the higher end of the tier list.
** As a footnote though, the design philosophy of partner systems ''L'' and ''UX'' is to urge the players to use usually-unused units in their teams, as such less powerful units will have a better bonus; not to mention that EN drainage of weapons increased by a sheer amount since ''L'' to discourage one-man charge.
* [[spoiler:TrueNeutral]]: [[spoiler: Kali Yuga is summoned into the chaotic world and bring about TheEndOfTheWorldAsWeKnowIt, wiping out all life, both good and evil]].

** Dialogue states that Michio injects Festum antibiotics after Yumiko has already been pregnant for a while. She had been inpregnated since chapter 26 most likely, and in chapter 37 before the battle begins, Michio has the Festum antibiotics injected because his Cynadetic Code match with Nothung Model Fafners has decreased due to age.

** [[BBSenshiSangokuden Koumei Re-GZ]] as Tactical Command is simply fantastic. Initially he provides a damage buff on your turn, after Stage 22 your units' attacks ignore Size Differences, and after Stage 37 ''ALL'' your units' terrain adaptation will increase by one rank, which basically means '''90%''' of them will become S Rank. Bruising through late-game with such overwhelming force can be satisfying for some. However, since some of the secrets involve an alternative Tactical Command, excessive use of Koumei will result in not getting quite an amount of secrets.