* CrowningMomentOfAwesome: [[OvermanKingGainer King Gainer defeating the Overdevil]] with the help of the {{Gaiking}}.
** After the fiasco with ''Anime/MobileSuitGundamSEEDDestiny'', [[Anime/MobileSuitGundamSEEDDestiny Cagalli Yula Athla]] returns to piloting duties in ''K''. Banpresto even makes her first scenario one that's awesome on principle - taking on the [[Anime/FafnerInTheAzureDeadAggressor Festum]] in the outdated, underpowered [[Anime/MobileSuitGundamSEED Strike Rouge]] becomes a lot more badass when the player realizes the Festum can [[GravityMaster alter gravity]], [[PowerOfTheVoid create black holes at will]], [[{{Telepathy}} read minds]], and pretty much EVERY canon pilot from ''Anime/FafnerInTheAzureDeadAggressor'' who had a chance against them had been genetically modified. If there was any enemy for Cagalli to take a swing at to show she hadn't lost anything, ''this'' was the one.
* CrowningMusicOfAwesome: "[[http://www.youtube.com/watch?v=yUU93LvIL3c Edax]]", the {{Leitmotif}} heard if the player is fighting against of the [[Characters/SuperRobotWarsK Edax generals]] and the BigBad.
** "[[http://www.youtube.com/watch?v=mld2IxYXgt0 Astral Burst]]", the music that plays during the final attack of the protagonist's MidSeasonUpgrade.
* GameBreaker: See [[GameBreak/SuperRobotWars entries here]]
** Of the equippable parts available in ''K'', "Orgone Cloud" is probably the best one[[note]]Unit gains "Double Image" (at 130 Will, gain a 50% chance of evading any attack), a large "Barrier" (reduce damage taken by 2000 points), small EN regeneration (10% per turn) and ignores terrain penalties[[/note]]. Although it's available on the fifth playthrough of the game, players can easily acquire it on the first playthrough by inserting a ''VideoGame/SuperRobotWarsJudgment'' cartridge into the NintendoDS GameBoyAdvance slot.
** The "Combo Attack" pilot skill allows a pilot to attack both units in a partner unit; at higher levels, the pilot can target additional partner units. Thus, a pilot with a level 3 "Combo Attack" can target upwards to six enemies at once. Since "Combo Attack" is only applicable to melee attacks, these are effectively short-ranged MAP Attacks, except without the usual drawbacks such as limited ammunition, reduced ExperiencePoints/credits earned and possible friendly fire. Additionally, "Combo Attack" deals ''full damage without any penalties'', meaning players are free to spam to their hearts' content immediately on the first turn.
*** Unlike the "Chain Attack" pilot skill in previous [=SRWs=], enemies don't need to be adjacent to one another or in a row; "Combo Attack" is far more effective so long as enemies are in range of the weapon that is "Combo Attack" applicable. Finally, destroying many units with a "Combo Attack" allows much faster Will gains for the pilot with the skill.
* RescuedFromTheScrappyHeap: Largely ''Gundam SEED Destiny'' characters; not only is Kira Yamato more reasonable (who doesn't attack the player's team on sight, but agrees to join them) and Cagalli's {{Chickification}} completely nullified, but ''K'' goes out of its way to make [[TheScrappy Yuuna]] [[RomanticFalseLead Roma]] [[ButtMonkey Seinan]] less of a coward and more affectionate towards Cagalli, to the point where [[spoiler:he acknowledges his faults and steps aside when Cagalli forcibly takes command of [[Anime/MobileSuitGundamSEEDDestiny Orb]]. Yuuna actually manages to [[SparedByTheAdaptation live through the Battle of Orb]], on top of this]]. Unfortunately, the same can't really be said about the [[Anime/MobileSuitGundamSEEDDestiny ZAFT]] characters (with the exception of Athrun Zala and maybe Heine Westenfluss).
* TheScrappy: [[Characters/SuperRobotWarsK Mist Rex]] is, beyond the shadow of a doubt, '''THE''' most hated [=SRW=] protagonist ever (and the second-most despised character period, just after [[Characters/SuperRobotWarsOriginalGeneration Lee]] [[TheNeidermeyer Linjun]] (or third, after [[Characters/SuperRobotWarsOriginalGeneration Wilhelm von]] [[BigBadWannabe Juergen]]). He spends most of ''K'' complaining about how much better his homeworld of Atreim is than Earth, acts like an asshole to cast over the party's character flaws (berating [[Anime/ShinkonGattaiGodannar Go Saruwatari]] for his women troubles, telling [[Anime/GunXSword Van]] to get over his bride-to-be's death, insulting Kira's idealistic pacifism, and denigrating inexperienced pilots like [[Anime/OvermanKingGainer Gainer Sanga]], [[Anime/ZoidsGenesis Ruuji Familion]], and [[Anime/{{Gaiking}} Daiya Tsuwabuki]]). The ultimate expression of this is his reaction to the ending as a fun adventure, completely glossing over [[spoiler:[[Anime/FafnerInTheAzureDeadAggressor Soushi Minashiro]]]] and his actions, who [[spoiler:[[HeroicSacrifice sacrificed himself to ultimately destroy]] the EldritchAbomination BigBad that was ''RESPONSIBLE FOR ALTREIM'S DESTRUCTION'']]. Made worse by the fact that a lot of his attitude is [[{{Hypocrite}} hypocritical]], such as one ending putting him in a harem situation after insulting Go for the very same reasons, or some instances where he [[LeeroyJenkins recklessly charges at Edax forces and gets his ass handed to him]], after berating other people for doing just that. Japan has a fandom [[MemeticMutation meme]] involving photoshopping Mist and his mecha into announced [=SRWs=] to screw with other fans.
* ScrappyMechanic: Many players consider the "Partner Battle" system useless, especially when standard {{Mook}}s later in the game have access to "Combo Attack". Also, partnering two units prevents the use of "Combo Attack", further discouraging the system. Those who ''do'' want to use the "Partner Battle" system find it does have some uses, such as always having [[CombiningMecha mecha in range of each other to combine]] or easier access to {{Combination Attack}}s. Ultimately, it's a question of weighing the benefits of these vs. being able to use a "Combo Attack". These are largely the reasons why the system is revamped in ''VideoGame/SuperRobotWarsL''.
** Following the release of ''VideoGame/SuperRobotWarsZ'', installments began standardizing many gameplay mechanics, such as "evasion decay"[[note]]As a unit is attacked, its evasion rate decreases every time it is targeted[[/note]], raising the cost of Spirit Commands and balancing individual Will gains. The one gripe players have with ''K'' regarding standardization are terrain rankings on units. First, ''K'' goes with the idea that if a series is never set in space, it cannot have more than rank of "B" in space. This is fine until players realize that MazingerZ, who was never been in space, gets a rank of "A". This also extends to the [[Anime/FafnerInTheAzureDeadAggressor Fafners]], while the [[GunXSword Dann of Thursday]] (who not only fought in space, but fought to a draw against the [[GunXSword Saudade of Sunday]], an Armor built for space combat) gets a "B". Secondly, despite the primary units from ''Anime/ShinkonGattaiGodannar'' fighting somewhat often in water, and the Fafners originating from an ''island'', none of them have a better rank of "B" in water (the exceptions are the [[Anime/ShinkonGattaiGodannar Cosmo Diver]], a dedicated underwater/space unit, and one of the unlockable Fafner units).
*** Additionally, multiple series in ''K'' don't have many flight-capable machines, which causes problems when late-game {{Mook}}s all take to the skies. This would probably be fine, provided the game gave players enough equippable parts allowing flight, but it doesn't.
* ThatOneLevel
** Scenarios 5 to 8, or "Those Four Levels"
*** Scenario 5 pits players against every named villain in the first half of ''OvermanKingGainer'', including [[OvermanKingGainer Brunhilde]], who in-series attacked friends and foes alike, yet in ''K'' only attacks the ''players' units''. Fortunately, only Brunhilde needs to be destroyed, except it has 10000+ {{Hit Point}}s (at Scenario 5, no less), and there are around 7-8 FragileSpeedster {{Flunky Boss}}es attacking the party at the same time. Fortunately, the scenario has easy {{Mook}}s to handle.
*** Scenario 6 kicks off the ''GunXSword'' plot, only Van is attacked by a lot of [[{{Gaiking}} Darius Empire]] {{Mook}}s. The player must ensure Van survive s for two turns until the [[{{Gaiking}} Daikuu Maryu]] appears to aid him, which is easier said than done.
*** Scenario 7 is a mix of the two before: it begins with the Dann of Thursday, the [[GunXSword El Dora]] [[CombiningMecha V]] (unfortunately, it's an EN guzzler), the [[GunXSword Brow]][[CombatMedic nie]] and Mist being attacked by a bunch of ''King Gainer'' grunts and bosses (again). A few turns later, the rest of the party arrives, only enemies also get two tough bosses as reinforcements - [[OvermanKingGainer Cynthia Lane]] and [[GunXSword Ray Lundgren]]. Like Brunhilde in scenario 5, they only attack the party, despite neither of them being aligned with the [[OvermanKingGainer Siberian Railroad]].
*** Finally, scenario 8 is MORE ''Overman King Gainer'' bosses/{{Mook}}s, plus Cynthia again, and the [[GunXSword Diablo of Monday]]. This scenario's slighty easier, but if players want the ''GunXSword'' {{Secret Character}}s, [[GuideDangIt Van must destroy the Diablon]] or they're LostForever. Fortunately, after all this hell, Scenario 9 is an easy BreatherLevel.
** Any ''VideoGame/VirtualOn''-based scenarios: the first two are long and boring, set in corridors against {{Mook}}s with MAP weapons, while the last one is on an open field with more grunts and EliteMooks with huge HP pools and the "Combo Attack" pilot skill, allowing them to crush the player's support units.
*** Scratch that: let's just say ''any'' long corridor-based scenario is long and dull (we're looking at you, final ''Fafner'' scenario).
** In one ''[[MobileSuitGundamSEED Mobile Suit Gundam SEED C.E. 73: Stargazer]]'' scenario, players must prevent any enemy unit from reaching a certain point...[[RecycledInSpace IN SPACE]]. This sort of mission objective isn't a problem, except many series and their respective mecha in this game don't go into space from their home series, meaning they're stuck with a relatively low rank of "B" for terrain (see ScrappyMechanic above). To emphasize, even a LightningBruiser like the King Gainer can easily get hit and often miss in space.
* [[TheyWastedAPerfectlyGoodPlot They Wasted A Perfectly Good Appearance]]: Despite the proper [=SRW=] appearance of ''Godannar'' (the series made its debut in ''Super Robot Wars Scramble Comannder 2''), units like the Goddinner, Genesister and Volspinner do not make an appearance, let alone even be mentioned in ''K''. However, thir pilots ''do'' make appearances during the intermission, just not their machines.
** The various frames for the KotetsuJeeg are not available in ''K''. One of them even has ''[[ThisIsADrill drill legs]]''!
** Despite the changes to its storyline, ''Gundam SEED Destiny'' still gets the short end of the stick in several areas. So what if [[spoiler:[[MobileSuitGundamSEEDDestiny Captain Talia Gladys]] dies in the game]]? Let players use the ''[[MobileSuitGundamSEEDDestiny Minerva]]'' battleship instead of the ''[[MobileSuitGundamSEEDDestiny Archangel]]'', for a change.
** Despite the individual forms appearing as {{Combination Attack}}s, [[GaikingLegendofDaikuMaryu Sky Buster Gaiking and Triple Gaiking]] do not appear.
** ''K'' marks the first time the actual ''[[VideoGame/VirtualOn Virtual ON MARZ]]'' storyline is used (the cast treated their ''[[VideoGame/SuperRobotWarsAlpha Super Robot Wars Alpha 3]]'' appearance as a "bonus level" from their world), yet players only get 4 of the 9 ''MARZ'' characters to use.
* ToughActToFollow: Between the various issues and the fact ''K'' followed fan-favorite ''VideoGame/SuperRobotWarsW'', this was inevitable.