[[quoteright:251:http://static.tvtropes.org/pmwiki/pub/images/Frontier_7017.png]]
[[caption-width-right:244:PowerRangers, Digimon-Style.]]

Takuya Kanbara is an average city kid who receives a text message from an unknown source instructing him to "board a train towards his destiny". Taking up the CallToAdventure, he finds the train in question and is whisked off to the Digital World, which is currently under threat from the malevolent Cherubimon. Cherubimon and his minions are consuming the very building blocks of the Digital World (its "Fractal Code") to increase their own power, and if nothing is done then the entire Digital World will be devoured.

All is not lost, however. Takuya and the other "chosen" children who boarded the train inherit the power of the Ten Legendary Warriors that saved the Digital World in the distant past, allowing them to transform themselves into Digimon. With their new powers, they fight to take back the stolen Fractal Code and restore the fractured Digital World to its former glory.

The fourth anime series in the ''Franchise/{{Digimon}}'' franchise, following ''Anime/DigimonTamers'', and basically the antithesis of its predecessor. While it does have its share of dramatic, intense, and introspective moments, it is [[LighterAndSofter light-hearted, fun and often childish]].

While not necessarily ''bad'', the series was heavily criticized for basically discarding the {{Mons}} concept in favor of a safer, more marketable HenshinHero gimmick, and suffered in the ratings for it. [[FranchiseKiller The lack of popularity forced the ''Digimon'' franchise onto hiatus for three years]], eventually resurfacing with ''Anime/DigimonSavers''.

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!!''Anime/DigimonFrontier'' contains examples of:

* AccidentalPervert: J.P. in "A Molehill Out of a Mountain". Before climbing a rope, he does the "ladies first" bit, forgetting that Zoe is wearing a skirt. Cue ArmorPiercingSlap.
* AlasPoorVillain
** [[spoiler:Cherubimon doesn't die until we've already learned that he's not responsible for what happened to him. He was corrupted by forces outside his control]]
*** A minor one involving Cherubimon is when [[spoiler:Ophanimon offers to turn him good again.]] You can easily tell he wants it to work, so he draws in close... [[spoiler:and, as it turns out, not only is he too corrupted for it to work, but Ophanimon also uses the chance to steal back the D-tecters-and that's if you don't assume that she was lying just to get them.]]
** Izumi/Fairymon shows some pity towards Ranamon before she defeats her because Ranamon was only nasty due to how pained and empty she was inside, so she hopes purification can heal her ("This digivice will purify your broken heart!") [[LostInTranslation The dub unfortunately removes this]], making Zoe/Fairymon [[MoralDissonance just happy to be rid of her]]...which [[BrokenAesop kind of goes against that particular episode's message.]]
** There wasn't much to Arbormon besides being a DumbMuscle VillainousGlutton, but his death at the hands of Duskmon did have a twinge of tragedy to it, as he seemed to genuinely believe the other Evil Warriors (including Duskmon) were his friends, being completely oblivious to the fact that none of them really cared all that much for him.
--> '''Arbormon:''' A friend in need is a friend indeed, [[VerbalTic right?]]
--> '''Duskmon:''' ''Wrong''.
* AlienSky: The Digital World has three moons of different colors, but that has nothing on Sakkakumon's [[PocketDimension internal environments]]. The skies all have a palette-swapped swirly pattern. Even the relatively normal-looking area where Zoe defeats Ranamon has clouds that form that pattern.
* AllegedLookalikes: People marvel at the near-identical Koji and Koichi, who like Kagome and Kikyo, don't particularly resemble beyond the things everyone has in common due to having the same art style (meaning they resemble about as much as any one person resembles anyone else with the same hair color.) ''Maybe'' you could handwave the totally different skintones as one spending more time in the sun than the other. (It leads up to their being revealed as each other's long-lost twin. Fraternal twins ''do'' exist, but again, we get "they look exactly alike!" OnceAnEpisode.)
* AllYourPowersCombined: Susanoomon. Sephirotmon is an example on the villain's side.
* AloofAlly: Koji, at the start, is literally a lone wolf. But it doesn't last long.
* AlternateUniverse: The Digital World.
* AlternativeForeignThemeSong: The English dub uses a completely new theme song, and while it's different from the Japanese version, it brings a whole different feel from the theme song that was used for the previous seasons.
* AntiVillain: Arbormon, played for laughs.
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* BareYourMidriff: The [[TheSmurfettePrinciple Smurfettes]] of both sides.
* BatmanGambit: Mercuremon pulls off an impressive one roughly halfway through the series, during the Sakkakumon arc. May also qualify for XanatosGambit, because [[spoiler: if the kids get killed inside Sakkakumon, he wins. If they win, he still does... what he ended up doing.]]
* BazaarOfTheBizarre: Episode 17, from beginning to end. The dub title copies the trope name, almost verbatim.
* BeamOWar
* BeamSpam: Both Duskmon and Cherubimon are fond of using these.
* BigDamnHeroes
* BigEater: Izumi. See episode 17, eating contest
* {{BFS}}: [[spoiler:Susanoomon's Heavenly Wings Slash[[note]] 天羽々斬, Ama no Habakiri[[/note]] attack (Celestial Blade in the dub) involves a MASSIVE sword-gun thing appearing in his hands, followed by an equally massive holy energy beam coming out of it, effectively becoming a humongous lightsaber that does Lucemon Chaos Mode in one swing, and in the final battle, the dragon that protects Lucemon Larva in one swing.]] Beowolfmon's Beo Sabre should definitely count also.
* BishonenLine: deliberately invoked, at least in reverse, with the new evolution system. (Which is immediately spun into a RunningGag for Ranamon.) Takuya and Kouji in particular cross ''back'' over the line at Mega/Ultimate level.
* BittersweetEnding: [[spoiler:Par for course, though has to be the least bitter ending of the bunch, as the heroes don't have Digimon partners to have torn from them. They still have to leave the Digital World and all their friends there behind, however.]]
** [[spoiler: If we count the legendary warrior spirits, then they actually ''do'' have Digimon partners. Cue the waterworks.]]
* BlondesAreEvil[=/=]BlondGuysAreEvil: Both averted. Duskmon and Lucemon are blond-haired villains, but Zoe and Ophanimon are blondes while the human spirits and fusion forms of Takuya and Koji all have blond hair.
* BlueWithShock: see episode 15.
* BondVillainStupidity: Ranamon has two great opportunities to attack the kids while they are unable to Spirit Evolve in episodes 15 and 16. Instead, she wastes half her time bragging and the other half of her time being whisked off by her own Beast Spirit's spinning attack.
* BookEnds: Though it didn't end up being the last season, ''Frontier'' appeared to be for a while. In the last episode, Susanoomon declares "AND SO, IT ENDS!" just before dealing the final blow, which parallels the dub name for the first episode of ''Anime/DigimonAdventure''. Furthermore, the last shot of the episode has the caption "The End," rather than "To Be Continued" as it had for all the episodes of the show's US run.
** The dub's episode naming had this as well; the first episode was entitled "All Aboard" while the final episode's name was "End of the Line".
* BrainwashedAndCrazy: [[spoiler:Kouichi before he's purified.]]
** Tommy[=/=]Kumamon in "Welcome to My Nightmare".
** [[spoiler: Most of the digimon the Digidestined fight due to Lucemon's corrupting influences/viruses, most notably his direct corruption and mind control over Cherubimon).]]
* BreatherEpisode: The Man in the Moon is You, comes right after the defeat of Cherubimon and the first battle with the royal knights and right before the last arc of the series. This episode mostly consists of comic antics as the digidestined try to escape the moon and get back to the digital world. Notable events include Metalkabuterimon shooting Agunimon out of the cannon on his head.
* CallBack: The series has its own completely unique soundtrack and doesn't reuse from previous series... except for one or two instances which fall under this trope. When Patamon is born, they play "[[http://www.youtube.com/watch?v=IxBTNsmppg8 Victory ~Theme of Good #2~]]", a lighthearted track from the ''Anime/DigimonAdventure'' soundtrack as an obvious callback to Patamon's role back then.
** It also repurposes Locomon's theme from the second Tamers movie, Runaway Digimon Express, for the various Trailmon in the series.
** The dub version will also use a snatch of music or two from ''Tamers'' when appropriate, just as ''Tamers'' borrowed the "Digi-armor, energize!" music from ''02'' now and again.
* CallToAdventure: Literally. Ophanimon calls the kids on their cellphones.
* {{Cameo}}: The Autumn Leaf Fair has several, but special mention goes to [[Anime/DigimonTamers Gallantmon]]. [[FusionDance He even has the same dual voice and refers to himself as "we."]]
** Arukenimon and Mummymon can also be glimpsed. ''In human form.''
* CavalryBetrayal: Villainous variation. Arbormon thinks Duskmon is there to lend him support. [[YouHaveOutlivedYourUsefulness He is wrong.]]
* CheatersNeverProsper: [=ShadowWereGarurumon=] and Doggymon in episode 18. Unusually, they cheat quite openly and yet never get disqualified for it, but their [[SeriousBusiness dirty cheating habits]] annoy Takuya to the point where he ends up ''fighting'' them fist-to-fist on top of the Trailmon in a TraintopBattle.
* CombatTentacles: [[AnIcePerson Korikakumon]] and [[GreenThumb Petaldramon]] can both use these to attack and restrain enemies. Korikakumon uses his braids while Petaldramon uses roots/vines that extend through the ground from his tail.
* CombinationAttack: How the team beats Sakakkumon.
* CombinedEnergyAttack
* ConservationOfCompetence: Most ''Digimon'' series have this to an extent, but in ''Frontier'' it becomes so strong in the back half of the series that four of the six main characters are rendered completely useless in combat until the climax of the final episode.
* ConservationOfNinjitsu: Applied against the ''good guys'' in their second fight against Gigasmon.
* [[ContemplateOurNavels Contemplate Our Digivices]]: Regularly. ''Very'' regularly.
* CookingDuel: [[ShoutOut "You Want Fries With That?" ]] leads to a literal one, including OnionTears. [[spoiler: Tommy wins.]] This quickly turns into a LowerDeckEpisode; Takuya and Kouji keep going while the others enter battle.
* CoolAndUnusualPunishment: Tickle torture in episode 23.
* CoolTrain: The Trailmon, or at least some of them, like Buffalo and Worm.
* CompressedAdaptation: The manhua.
* CorruptCorporateExecutive: Snimon in episode 5, who tries to kill Agunimon and his friends because they destroyed part of his factory.
* TheCorruption: A pervasive dark force emanating from Cherubimon causes otherwise good digimon to become mischievous at best, positively evil at worst.
* TheCorrupter: Cherubimon to most of the antagonistic Digimon.
* CrossPoppingVeins
* CrossCounter: Episode 7 has Takuya and Kouji defeat a group of [=ShadowToyAgumon=] by making them do this after they've combined into a pair of HumongousMecha.
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* CurbStompBattle: The Royal Knights arc can be described as follows: 1) The Royal Knights target an area to absorb its data. 2) The heroes try to stop them. 3) The heroes [[spoiler: lose. Badly.]] 4) Wash, rinse, repeat [[spoiler:until Lucemon is freed.]] The series will NeverLiveItDown.
** [[spoiler:Lucemon against [=EmperorGreymon=] and [=MagnaGarurumon=], they don't have a chance. Every time Susanoomon shows up however, Lucemon is the one that gets beaten very badly, usually by 1 single attack on each form (the final form has 2 separate Digimon, so two attacks there).]]
** The first couple of encounters with Duskmon go like this, too. The first time was because the heroes didn't know what to expect and the second was because Takuya just charged in recklessly.
* {{Cyberspace}}: Digital World
* DarkIsNotEvil: Kouichi, [[spoiler:post-HeelFaceTurn.]]
* DeadToBeginWith: [[spoiler:Kouichi. He had an accident while following Kouji down Shibuya Station, which caused only his soul to ever reach the digital world. His body never was there.]]
* DepartmentOfRedundancyDepartment: One of Beetlemon's attacks is called Lightning [[GratuitousGerman Blitz,]] 'blitz' being the German word for 'lightning.'
* DevourTheDragon: [[spoiler:Lucemon does this to Crusadermon and Dynasmon.]]
* DesignatedGirlFight: Izumi and Ranamon.
* DoggedNiceGuy: Junpei to Izumi.
* DubInducedPlotHole: The dub adds some lines that say that Koji has problems getting along with his stepmother because "it hurt so much when Mom died", with the distinct implication that he was there to see it. As later episodes prove, this is clearly incorrect because [[spoiler:not only is she not dead, but also if he had been around to ever see his biological mother he would have remembered Koichi, and it's established clearly that the two did not know each other existed]]. Particularly egregious about this is that the living proof of this contradiction ([[spoiler:Koichi]]) appears in the ''very same episode''.
* DubNameChange: While every dub of Digimon has this happen, this show's dub use of the trope was just plain ridiculous in how much was changed. An example of this is that almost all of the children's Digimon forms name were changed, sometimes pointlessly so (Wolfmon became Lobomon in the dub, for instance).
** The dub also changes "[=DigiCode=]" to "Fractal Code". It's possible that this was changed in order to differentiate it from the Digimon franchise's CypherLanguage known as [[http://digimon.wikia.com/wiki/DigiCode DigiCode]], which in Japanese is デジ文字 (literally translated as Digi-Letters) rather than デジコード ("[=DigiCode=]" written phonetically).
* DudeMagnet: Zoe
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* EarthShatteringKaboom: [[spoiler:Happens to the three moons, with remains of the yellow one obliterating the other two.]]
* ElementalPowers: The 10 Legendary Warriors each command one element: [[PlayingWithFire Fire]], [[MakingASplash Water]], [[BlowYouAway Wind]], [[DishingOutDirt Earth]], [[ExtraOreDinary Metal]], [[ShockAndAwe Thunder]], [[AnIcePerson Ice]], [[GreenThumb Wood]], [[CastingAShadow Darkness]], and [[LightEmUp Light]].
* MrFanservice: Kouichi. And Kouji to an extent.
* EverythingsBetterWithSpinning: Vritramon, Shutumon, Bolgmon, Calmaramon, Gigasmon, Arbormon, and Sakkakumon all have attacks with spinning.
* {{Expy}}: Expies of many of the previous series' Digimon (in various evolutionary levels) appear here.
** The main characters also bear notable similarities to the ''Anime/DigimonAdventure'' cast.
** There is also Icedevimon's impression... of ChristopherWalken.
** To be more exact:
*** Takuya is an obvious Taichi/Tai expy, and his evolutions bear many striking similarities to Greymon, including [=EmperorGreymon=], who is basically a [=WarGreymon=] on roids.
*** Kouji is an expy of Yamato/Matt, and his evolutions likewise resemble Garurumon's (especially Garmmon/[=KendoGarurumon=]).
*** Zoe/ Izumi combines traits of Mimi and Sora together, although her evolutions are only vaguely similar at best.
*** Tommy/Tomoki is an expy of Takeru/TK, although his evolutions are closer to resembling Gomamon's and Terriermon's.
*** JP/Junpei is a mix of Koshiro/Izzy and Jo/Joe, or at least sort of. His evolutions are similar to the Kabuterimon line.
*** Koichi is pretty similar to Ken (making him to only throwback to someone out of the original ''Adventure'') and his evolutions are similar to [[SacrificialLion Leomon]].
*** and finally, [[spoiler:Susanoomon is an obvious Omegamon/Omnimon expy]].
*** [=ShadowWereGarurumon=] and Dogmon are basically [[WackyRaces Dick Dastardly and Muttley]] in the dub.
* FacialMarkings: Agunimon (and by extension, Aldamon), Flamemon, Kazemon, Grumblemon, Kumamon, Korikakumon and Lucemon all have them. [[spoiler:Susanoomon]] has Agunimon's FacialMarkings on his helmet.
* FailureHero: All of the heroes are turned into this during the Royal Knights saga.
* FantasyKitchenSink: While Tamers really started the push to start bringing mythology in, incorporating the Four Gods and the Chinese Zodiac, Frontier turned west for its Digimon. Takuya's various Hybrids are derived from Hindu mythology; Garmmon is Garmr, the guardian of [[TheUnderworld Hel]] alongside Hrelsvelgr (who you might know as [[{{Foreshadowing}} Velgrmon]]); Shutumon is based on a Sumerian god of wind (and illness and pestilence); Blizzarmon is very likely a Norse [[http://en.wikipedia.org/wiki/Berserker Berserker]] (short version: legendary bear-coat warriors); and Bolgmon is named for the proto-Celtic god of lightning, though the Digimon's actually associated with AncientEgypt and scarabs.
** Gigasmon is derived from ancient greek giants, Sephorotmon is one huge shout out to the Kabbalah (see Rule of Symbolism below). [[spoiler:Koichi, post-reformation]] adds a lot of Ancient Sphinx derivations, and then there's Susanoomon, named for Susanoo no Mikoto, the ocean god who slow the Orochi. Orochimon doesn't make a significant appearance, however; Susanoomon instead wields a weapon called the "ZERO ARMS: Orochi".
* FauxActionGirl: Zoe really got the short end of the stick in the battling department. Each time she unlocks a new spirit, she has some initial success against her first opponents but fails to follow through when the Difficulty Spikes[[note]]When she achieves Kazemon's form, her ''first fight'', no less, she takes out three Mushroomon handily, but loses when they combine into a Woodmon. Unlocking Zephyrmon allows her to deal with Ranamon, but she can't deal with Calmaramon/[[/note]] and usually has to be bailed out by one or more of the boys. She's even BroughtDownToNormal for several episodes, forced to watch the male characters fight in her place. The only enemy she manages to defeat on her own is her ArchEnemy Ranamon in a DesignatedGirlFight, and even ''that's'' a tough sell. The single positive step in her development is when she acquires her Beast Spirit and gets upgraded to "somewhat effective" as Zephyrmon.
* FauxAffablyEvil: [=IceDevimon=] chats enthusiastically with his victims, to the point where you wonder if he is ObliviouslyEvil or ObfuscatingInsanity.
** Mind you, the things he says are pretty psycho. "It would be so ''joyous,'' all the pain and the suffering!" (Quote from dub.)
* FillerVillain: [[CheatersNeverProsper ShadowWereGarurumon]] and Doggymon.
* FireIceLightning: When the 10 Ancient Warrior entrust their spirits to the Three Great Angels, Orphanimon was entrusted with three of them under these elements.
* FiveBadBand
** BigBad: Cherubimon.
** TheDragon: Duskmon
** EvilGenius: Mercurymon
** TheBrute: Arbormon and Grumblemon.
** DarkChick: Ranamon
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* ForgotICouldFly: Izumi in "A Molehill Out of a Mountain". She is as scared of falling as any of the others, when she ''could'' just turn into [[WingedHumanoid Kazemon]] and fly up.
** Similarly, in "The Swiss Family Digimon", Izumi was the only member of the crew who still had her Digivice. Everybody else had their Digivices stolen, and the (non-dangerous) thieves flew to a (non-dangerous) nearby island that's specifically stated to be inaccessible by sea. Rather than just have Izumi fly over to collect the Digivices herself, the crew fusses over trying to find a flying Digimon for a while, then opts to just build a raft.
** In the fight against IceDevimon, you have Kouji and Takuya's digivices frozen. Would have been really useful if one of their teammates had the elemental affinity for ice and could have unfrozen them, huh?
* {{Foreshadowing}}: When [[spoiler:Kouichi]] talks about how he ended up in the Digital World, he states that he at first thought he had ended up in the afterlife and was a wandering spirit. [[spoiler:He may not have ended up in the afterlife...but he wasn't far off.]]
** In the original Japanese, Wolfmon's attacks are all in GratuitousGerman. So, interestingly enough, are Duskmon's. Guess why.
** In the dub: [[spoiler:"I'd rather die than betray my brother!"]]
* ForgottenPhlebotinum: In one episode, Takuya learns that [[spoiler:being a legendary warrior also gives him the power to control/predict the weather which he can use to increase his attack strength. After that one episode, it never comes up again.]]
* TheFourthWallWillNotProtectYou: Lucemon's message plays on every screen in the world... and finally, on yours.
* FriendlyTickleTorture: In episode 15, Koji is briefly tickled by Takuya and Junpei.
* FusionDance: The Advanced Hybrids are combinations of the Human and Beast spirits, while Susanoomon is the combination of [=KaiserGreymon=], [=MagnaGarurumon=] and two or more of the Chosen themselves.
* GenderBender: In TheMovie, the male Beast Digimon Hippogriffomon can [[StanceSystem slide evolve]] to the female Human Digimon Darcmon. His true form is Murmukusmon (male), who [[VoiceOfTheLegion speaks with both their voices]] at first.
* GenreSavvy: J.P. invokes this (via the use of Horror Tropes) to prevent Takuya stupidly running after Kouji, complete with American-esque comic ArtShift.
* GogglesDoNothing: Takuya, this however is averted, as he uses his in a few occasions in the show.
* [[GoneSwimmingClothesStolen Gone Swimming, D-Tectors Stolen]]: This befalls almost everyone in episode 15. Zoe is spared, in no small part because she used a separate dressing room.
* GratuitousForeignLanguage: Many of the Digimon in this season had names in GratuitousEnglish, but were changed for the English dub (presumably to [[{{Woolseyism}} preserve their exotic flavor]]). The most notable instances were Fairymon becoming Kazemon, Wolfmon becoming Lobomon, and Grottomon becoming Grumblemon.
** However, the dub did keep the GratuitousItalian provided by Izumi/Zoe.
** GratuitousGerman: This time around, the original loved to use this for attack names. ''Zwei Händer! Geist-o Abend!'' Even the dub gets in on it, with Kaiser Leomon becoming Jäger Lowemon.
** Duskmon used German attack names in the original while Velgemon's attacks were GratuitousEnglish.
* GroundPunch: Beetlemon occasionally did this when using his Thunder Fist attack, while other times, he would just use it directly against an enemy.
** Gigasmon also did this to try to attack attack Agunimon. The resulting shockwave didn't have quite enough range to land a hit.
* HeelFaceTurn: The four Dark Legendary Warriors' spirits after they have been defeated and purified.
* HerBoyfriendsJacket: At the beginning of Episode 17, Koji offers his jacket to Zoe for her to wear when she's feeling cold, which leaves JP feeling rather jealous.
* HeroicSacrifice: [[spoiler:Kouichi dies a DisneyDeath so the other five can defeat the BigBad.]]
* HeroOfAnotherStory: The first act of the story reveals that Ophanimon punched a massive hole in the barrier between Earth and Digiworld in the hopes that someone might get through to awaken Seraphimon. This proves to be a giant mistake, as it let in more than just the main cast, but dozens of other children. We get to meet a few of them, Katsuharu, Teppei, Chiaki, Teruo, and the Angemon assigned to watch over them.
%% HeyItsThatVoice was moved to the trivia tab. Please don't add it back here.
* HolyHandGrenade: This seems to be Susanoomon's [[InfinityPlusOneElement element]].
** Ophanimon and Seraphimon, being angelic Digimon, use this as well.
* IKnowWhatYouFear: Sakakkumon's ploy near the end of his arc is to torment the heroes with their own fears.
* ImNotAfraidOfYou: When Takuya (as Flamemon) confronts his hallucinations of Duskmon in the real world.
* InfinityPlusOneElement: Suggested by Susanoomon's design. It uses the Kanji for heaven[=/=]sky the same way that the warriors' designs use the kanji for their respective elements.
* InTheEndYouAreOnYourOwn
* IncendiaryExponent: Agunimon's ''Salamander Break'' and Vritramon's ''Flame Storm''.
* InconsistentDub: ''Frontier'' marks the point where Bandai of America simply stopped giving a shit about keeping ''Digimon'' consistent. None of the dub supporting material's information about [[CallingYourAttacks attacks]] is even remotely consistent with the dub itself for Digimon introduced in ''Frontier'', and even several names are way off![[note]]most egregiously Cherubimon/Kerpymon, Ranamon/Lanamon, Sakkakumon/Sephirothmon, Crusadermon/[=LordKnightmon=][[/note]] The dubbed show itself certainly isn't devoid of problems - it had a chronic habit of mismatching attack names with the correct attack, though it at least had the decency to keep names straight. It's also worth noting that the first episode of the dub had "spirit evolution" called "digivolution," which is the only time the series calls it that.
* InternalHomage: A number of minor characters are references to Digimon from previous series. Most apparent in a episode in which the heroes visit a school, consisting of the baby-forms of many main character Digimon from previous series, plus a Tsunomon who can evolve to Gabumon. The dub played this up by having most of the homage characters use their previous voice actors - including one who was a FusionDance originally. Gallantmon the store owner - originally a non-speaking role - brought back Creator/SteveBlum and Creator/BrianBeacock to say "Wish ''we'' could help" in the simultaneous voice of [[Anime/DigimonTamers Guilmon and Takato]].
** Oddly enough, when a pack of Gomamon made an appearance, the one obvious reference wasn't made: having R. Martin Klein (who voiced Gomamon in ''Adventure'') reprise the role. Klein had already done a large number of roles in ''Frontier'' before the episode, notably a Toucanmon in the ''same'' episode that sounded exactly like Gomamon.
* InvincibleVillain: The Royal Knights especially, which is part of what adds to their ArcFatigue for many viewers.
* JumpedAtTheCall: Takuya
* {{Kiai}}: Dear ''god'', ''Frontier'' loved it. ''Everything'' involved shitloads of yelling, especially later forms of Spirit Evolution (giving the impression that the process was in fact quite painful). It got to the point where so much yelling was required that MichaelReisz (Takuya) point-blank refused to voice [=EmperorGreymon=] for fear of permanently damaging his voice; Creator/DaveWittenberg instead filled in there - where, ironically, almost no shouting was involved.
* [[KidHero Kid Heroes]]: Much like its predecessor, Frontier deconstructs the idea, albeit in different ways; rather than thwart the vilains at nearly any turn, they lose consistently even against the [[StarterVillain Starter Villains]], and notably, this is the only season where [[spoiler:the world is legitimately destroyed]].[[ReconstructedTrope Even so, the world gets rebuilt and habitable, and hey, little victories still counts as victories, if less than ideal.]]
* KnightOfCerebus: Things get serious whenever Duskmon shows up.
* LargeHam: Ice Devimon seems to fall under this quite nicely. Justified as his seiyuu is none other than NorioWakamoto. The dub does this as well by having the VA emulate ChristopherWalken.
** Superstarmon falls under it much better.
** Lucemon gets hammier with each form.
* LadyOfWar: Crusadermon in the dub.
* {{Leitmotif}}: All of the human characters have one in the Japanese version, titled "Theme of (character's representative element)". They're actually re-arranged instrumental versions of the characters' respective [[ImageSong Image Song]]s (with the exception of [[spoiler:Kouichi]], whose Theme of Darkness is a rearrange of Kouji's Theme of Light).
* LethalChef: Takuya and Koji in the Kitchen Battle episode, their burgers range from stacking every kind of meat imaginable into a patty, to piling seafood up inside the same bun, to, well basically anything that makes everyone at the restaurant feel sick.
* LightIsNotGood: [[spoiler:Lucemon]]
** And [[spoiler:the Royal Knights]]
* LighterAndSofter: The series certainly wasn't complete sunshine and rainbows and did have very dark and introspective moments (especially around Kouichi), but considering that its immediate predecessor was ''Anime/DigimonTamers'' and its successor was ''Anime/DigimonSavers''... yeah, this was inevitable.
* LoveTriangle: Zoe is at the center of what amounts to a love-polygon involving her peers. Officially, Junpei has a blatant crush on her and she comes very close to confessing an attraction to Takuya[[note]]Late in the series, he mentions he likes her, though his reaction to his own statement creates ambiguity over whether he meant it in a romantic context or just flubbed a statement of LikeYouAndEverybody. He later has a dream involving them on a date, though.[[/note]], and there's some ambiguous with Koji during the first half of the season. [[spoiler:Cherubimon -> Ophanimon <-> Seraphimon]] is another important example, and had some pretty far-reaching consequences in terms of the franchise's mythology.
* LowerDeckEpisode: By the time Takuya and Koji get so overpowered and even gain powers that take the others' powers away, it really felt like this the times the main two were absent or disabled so that the others got to do something.
* LuminescentBlush: Various, particularly Takuya, Izumi, and Junpei.
* LyricalDissonance: Kouichi's image song is an upbeat, catchy rock song... but it's titled "With Broken Wings" and its lyrics contain things such as "a stray dog without a collar is laughing at me."
** To an extent, Blader, [[spoiler: the VillainSong from his Duskmon persona.]] Also catchy and upbeat, among what's featured in the lyrics are doing nothing but fighting and not forgiving anyone.
* MeaningfulEcho: A three-parter involving Kouji and Kouichi in the original Japanese version.
** Episode 46:
-->'''Kouji''': "I'm happy I came to this world. I got to meet you and all."
** Two episodes after, [[spoiler:Kouichi's FamousLastWords as he sacrifices himself to Lucemon and entrusts Kouji with the Spirits of Darkness]]:
-->'''Kouichi''': "I'm glad I came to the Digital World. I'm glad I could meet you."
** And finally, as [[spoiler:Kouji returns to the Real World and brings Kouichi back to his body via miracle]]:
-->'''Kouji''': "Can you hear me? It's Kouji! I came back to meet you, Kouichi!"
-->'''Kouichi''': Kouji...I also wanted to meet you.
* MerchandiseDriven: Some criticized the series for appearing notably more so than the previous series. Aldamon and Beowolfmon are almost blatantly toy-manufacturer-friendly forms (take the Human Spirit, add the Beast Spirit as an extra layer of armor, and ''done'')[[note]]So too with [=AncientGreymon and AncientGarurumon=], having inverted designs of the two Digimon mentioned. The combined form of the Spirits of Darkness, Reichmon, would also count, but he [[ExpandedUniverse never actually appeared in-series]][[/note]]. Susanoomon, the final hero, was also a visible amalgamation of [=EmperorGreymon=] and [=MagnaGarurumon=] (much like [[{{Expy}} Omegamon]], [=WarGreymon=], and [=MetalGarurumon=]). Of course, considering ''Digimon'' always was based on a toyline to begin with and that the toy necessity otherwise had no effect on the series, the criticism isn't the most valid.
* MissedTheCall: A group of four kids, including two who bullied Tomoki. They were explicitly told to turn around and go home after the real Chosen were picked out of the masses, but [[spoiler:instead of going home, they decided to wander the Digital World and an Angemon had to be sent to protect them.]]
* MistakenForSpies: [=KaratsukiNumemon=], upon hearing that the children are Legendary Warriors in episode 6, confuse them with Grumblemon's lot, and [[UnwillingSuspension dangle them over a cliff]], trying to [[IHaveYourIndex persuade Grumblemon into returning his hostages in exchange for "his"]]. Naturally, the bad guy ''totally'' didn't care if the good guys got thrown off a cliff, and they had to escape on their own to fight him and save... the guys who were dangling them off a cliff a minute ago.
* {{Mons}}
* MoreThanMindControl: [[spoiler:Cherubimon->Kouichi, but most notably Lucemon->Cherubimon and many others, directly or indirectly.]]
* MorphicResonance: In addition to [=EmperorGreymon=] and [=MagnaGarurumon=], Susanoomon has a couple of Agunimon's traits. It has Agunimon's FacialMarkings and his belt buckle, albeit with a different symbol, incorporated into its armor.
* MsFanservice: Zoe is the franchise's first female lead created specifically with fanservice in mind. Her clothes are more revealing than her predecessors', her Spirit Forms are clad in what amounts to some rather complex lingerie, her TransformationSequence has a FreezeFrameBonus PantyShot, and the BeachEpisode has a few {{Imagine Spot}}s consisting of her in poses that would be more appropriate to a gravure idol than a prepubescent girl. This trope created a ''really awkward'' combination with TheSmurfettePrinciple and FauxActionGirl.
** Ranamon is another example, given that her design is a blend of CuteMonsterGirl and WalkingSwimsuitScene. She uses her sex-appeal to turn her adoring fans into minions, as it happens.
* MythologyGag: Towards the end of the series, TheHero and TheLancer are able to obtain a Greymon form that uses the KillItWithFire approach and a Garurumon form that's loaded with enough weapons for a MacrossMissileMassacre, respectively. [[spoiler: This is taken to its logical conclusion in the last couple episodes, where they combine into a single Digimon that has the Greymon head on its left wrist, and the Garurumon head on its right wrist.]] Totally a MythologyGag to DigimonAdventure.
%% Narm was moved to the YMMV tab. Please don't add it back here.
* NearVillainVictory: They're able to ''completely destroy the world and its three moons'' before they are stopped. The world gets better.
* NewPowersAsThePlotDemands: In all fairness, this ''is'' a ''Digimon'' series and a shounen series. In an amusing case, one episode had Takuya realise he could draw strength from the weather... then never used this ability again.
** Although it isn't weather, he later uses heat/fire to make his attacks stronger.
** Koji uses EyeBeams while fighting Karatenmon, which he had never done before or since while Tommy and Zoe used abilities that they never had used before in their Beast Spirit forms while fighting [=IceDevimon=].
* NonHumanSidekick: Bokomon, Neemon, [[spoiler:Patamon, Salamon and Lopmon.]]
* NoSocialSkills: The Digimon Analyzer says that Datamon is "good with machines, but not so good with people."
* OlderAlterEgo: With the exception of Tomoki's, all of the kids' Human Spirit Digimon forms, along with Takuya and Kouji's Hybrid Spirit Digimon forms, have this effect.
* OneWayVisor: Both Kazemon and [[spoiler:Susanoomon]] have them. Seraphimon, Ophanimon and Crusadermon have one-way helmets.
* OneWingedAngel: The Double Spirit Evolution, a rare example of the heroes undergoing OWA.
* OutOfClothesExperience: The transformation sequences involve characters' clothing instantly dissolving, though conveniently reappearing upon turning back. We also get ''Tamers''-esque naked spirit scenes [[spoiler:once the kids all become Susanoomon near the end.]] BarbieDollAnatomy is thankfully in full play.
* OutOfFocus / OvershadowedByAwesome: ''Everyone'' who isn't Takuya and Kouji in the final arc of the series. [[spoiler: Even the previously important Kouichi can do nothing but a HeroicSacrifice that gives ''them'' a power-up needed to fight the BigBad!]]
** The manhua adaptation, [[CompressedAdaptation being much shorter]], was even worse about this. J.P. didn't do anything after getting his Beast Spirit, Zoe was shown getting her Human Spirit in a flashback and Zoe and Tommy get their Beast Spirits at the same time. Ranamon also gets this treatment. Her second battle with Zoe simply isn't shown. Koichi also never uses his Beast Spirit.
* PastelChalkedFreezeFrame
* ThePowerOfFriendship: Emphasized heavily throughout the series, most notably during the Sakakkumon arc as part of the tests.
* PrecisionGuidedBoomerang: Sepikmon.
* PreviouslyOn: [[Anime/DigimonTamers Ri]][[Creator/MelissaFahn ka]] in the dub, until [[RealLifeWritesThePlot Melissa Fahn left to join the cast]] of ''Theatre/{{Wicked}}''. Bokomon took over, and wasn't nearly as good at it.
* ProtagonistPowerUpPrivileges: Takuya and Koji are the worst offenders in the franchise until [[Anime/DigimonXrosWars Taiki and Kiriha come along]].
* ThePsychoRangers: The Dark Legendary Warriors, [[spoiler: at least until they're purified and freed of Cherubimon/Lucemon's control, and ultimately end up going on to be instrumental in defeating Lucemon.]]
* PublicDomainSoundtrack: In the ''Frontier'' movie, Izumi hums a tune by Maurice Ravel in the beginning. This was kept in the dub!
* PurelyAestheticGender: ''[[Anime/DigimonTamers Tamers]]'''s dub established it, but ''Frontier'' averts it completely. Different universes allows for different interpretation.
* QuirkyMinibossSquad: As [[PsychoRangers above]].
* RedemptionDemotion: After being freed of Cherubimon's mind control and given a pair of proper spirits, Kouichi routinely gets his ass kicked by enemies. This is justified as his victories took place on the continent of Darkness which gave him a field power bonus and his later fights where in a place of great light. Nevertheless, he is rendered useless in combat by Takuya and Kouji's later evolutions but so are the others.
* RedOniBlueOni: Takuya and Kouji, who of course are associated with red and blue respectively.
* ResetButton: [[spoiler:The Digital World gets restored after Susanoomon finishes royally pwning Lucemon Satan Mode (the dragon and the Lucemon Larva it's protecting. Also, Kouichi's death (see DeadToBeginWith above) also gets reversed when the rest of the Digidestined get sent back to the time when they left, and they hurry to the hospital where Kouichi is dying, before they save him and their digivices turn back into mobile phones.]] This is is part of the Digivices. Returning the data taken by the {{Monster of the Week}} and seeing the area restored stops happening ''really'' early on, but after their final victory, the entire world gets the treatment.
* RuleOfSymbolism: There's alot of pretty clever symbolism present in Sakakkumon, pointed out by [[http://digimon.firstagent.net/2013/04/frontier-episode-24-alone-but-never.html this blog]]. It works pretty well with Mercurymon's SmugSnake hamminess. He's a pretty smart guy and he likes to rub your face in it at every opportunity, and what better way than religious motifs to make him seem deeper than he really is.
** The Metal Area where Mercurymon first fights Takuya is in the head, or Keter. Not only is it the obvious home for Mercurymon, the many mirrors strewn about and the tough time Takuya had finding his bearings works well in a world symbolizing things beyond man's comprehension.
** The creepy church is Chokhmah, symbolizing divine wisdom, intuitiveness and insight. The church and Seraphimon's presence fit into this picture.
** The Darkness Area where Koji and Duskmon duke it out is Tiferet. It means “adornment” and represents balance. Light and dark, giving and receiving, wisdom and emotion all come together here, the sphere that connects to all but one of the others. That could explain its “light on the outside, dark on the inside” portrayal.
** The Ice Area where Takuya battles Ice Leomon is Gevurah, meaning Strength. It's the judgment sphere, where even a usual good guy like Leomon has to face Takuya's wrath.
** The Earth Area JP finds himself in is called Yesod, meaning “foundation.” Basically, it does the dirty work of collecting the energies from other spheres and making something tangible out of them. JP having to balance himself and his shadow in order to discern reality would be the symbolism here, as does making earth the dominant element.
** The Flame Area is Binah, which represents understanding. While the top right sphere is a sort of divine wisdom, the top left here is rationality and common sense. Tommy figuring out what his brother has been trying to tell him fits well here.
** Koji goes to the Wind Area Hod. It represents majesty and, to borrow a page from the landscape, seeing the forest from the trees. In order to get stronger, Koji needs to learn to rely on his friends. Someone has to tell him that first.
** Zoe's epic final battle with Ranamon takes place in Netzach, the victory sphere. It's about having the tenacity to overcome obstacles and achieve your goals. Pretty self-explanatory.
** Takuya and JP's pit stops are in the Chesed and Malchut sphere, representing kindness and the physical world respectively. Um... also self-explanatory!
* TheSacredDarkness: The element of darkness enjoys the same sanctity and importance as the other nine. [[spoiler: Kouichi's purified spirits resemble a heroic BlackKnight instead of a demonic one.]]
* SacrificialLion: Even if he isn't a Leomon, Kouichi's forms are lions and thus he is still considered to carry on the tradition. In Japan, [=JagerLowemon=]'s name is [=KaiserLeomon=]; while he was not in this form when he died, this is typically counted as yet another victim claimed by the Leomon curse. Also, [=IceLeomon=], a MonsterOfTheWeek; Agunimon suspected that he was being [[MindControl controlled]] by Sakkakumon and thus had to destroy him. However, as no digi-egg was left behind, it seems likely that he was not a real Digimon to begin with ([[spoiler: much like the Mercurymon they fought at the end of that arc proved to be, as the real Mercurymon was himself ''Sakkakumon'' and had a lot of fight left in him.]])
* SailorEarth: Most of the time, they are created to either fill in the roles of the keepers of the remaining four spirits, or give the series more girls so Zoe isn't alone.
* SaveBothWorlds
* SealedEvilInACan: [[spoiler:Lucemon]]. Also Icedevimon.
* SeanConneryIsAboutToShootYou: Tommy's eyecatch in the Japanese version has Kumamon pointing his snowball cannon at the viewer.
%% SeasonalRot was moved to the YMMV tab. Please don't add it back here.
* SeparatedAtBirth: [[spoiler:Kouji and Kouichi]], not quite birth but a very young age.
* ShesAManInJapan: CampGay [=LordKnightmon=] became the dub's female Crusadermon. Some [[TropesAreTools actually like that]].
** In the German Dub, Seraphimon, Cherubimon and Lucemon became all female like Ophanimon. Oddly enough, since Ophanimon, Cherubimon and Seraphimon's Rookie level forms got voice actors from previous season who played the same digimon, Patamon is male.
* ShipTease: Takuya/Izumi, Kouji/Izumi, and Junpei/Izumi all had their moments.
* ShoutOut:
** In the English dub, a Candlemon village leader invites the kids to "please, [[Disney/BeautyAndTheBeast be our guest!]]"
*** At the time of the original airing, Disney owned Digimon's dubbing rights.
** A [[StarWars lightsabre-wielding hero]] duels with a villain in black armour wielding a red sword, [[spoiler:which is followed by a certain revelation...]]
** Possibly Sorcerermon to [[Literature/LordOfTheRings Gandalf the White]], considering that's he basically Wizardmon, but only in brighter, whiter clothes and has a cool staff. Considering like Gandalf [[spoiler:that Wizardmon sacrificed himself to save his friends, and has links to angels, its only fitting.]]
** In Izumi's Flashback in Episode 8, she is seen reading a book called "Prince of Star" which is the Japanese title of Literature/TheLittlePrince
** [[FillerVillain ShadowWereGarurumon and Doggymon]] are based on [[WesternAnimation/WackyRaces Dick Dastardly and Muttley respectively.]] Doggymon even has the same laugh.
* TheSmurfettePrinciple: Izumi is the only girl amongst a squad of guys. Ranamon is her [[ThePsychoRangers Psycho Ranger]] counterpart. The other four kids also have only one girl member.
* SolomonDivorce: [[spoiler: Kouji and Kouichi]]
* SpellMyNameWithAnS: Crusadermon has a borderline ridiculous case of this, not helped by multiple instances of InconsistentDub. [[note]]In the Japanese, the character's name is a source of confusion, as the katakana characters can be read as either [=LordKnightmon=] or [=RhodoKnightmon=] - a pun, since rhodonite is the character's color. In the ''Savers'' dub, the character was renamed to ''[=LoadKnightmon=]'', [[ExecutiveMeddling apparently at the request of Toei Animation themselves]] [[/note]].
** There's also the terminology question of "Rose Morning Star" or "Venus Rose" for ''Bara no Myoujou''. (The dub goes with the former, and is probably a more accurate translation, but the part of the fandom that follows the Japanese version has latched onto the latter.)
* SpoilerOpening: The series' second Japanese ending is one of the franchise's most notable examples. It begun playing at the end of the episode revealing [[spoiler: Duskmon is a human]], and showed [[spoiler: Kouichi as a member of the group, his natural Darkness Human and Beast forms AND Takuya and Kouji's new D-Scan designs that were not introduced for another 8 episodes]]!
** Ironically,another opening averts this; most Digimon series had openings that, once a new member of the core cast was introduced, would change to show the new member, but Frontier's opening never changes even after [[spoiler:Kouichi joins]].
* StockFootage: The spirit evolution sequences, which are reused and almost [[{{Filler}} never edited down]]; par for the course with ''Digimon''. Another use of StockFootage also caused continuity problems in the last episode. When the children are about to Spirit Evolve together into Susanoomon, all of them raise their D-Tectors, and the screens glow. This was reused footage from an earlier episode. It wouldn't be a problem or even a noticeable issue if it weren't for the fact that the reused footage contained Kouichi's raised D-Tector as well, making the total of raised Digivices into 6 rather than 5, and the fact that Kouichi [[spoiler: was "killed off" two episodes ago]]. Though one could argue that Kouichi was still with them "in spirit" so to speak.
** Several variations of a montage of the four other children [[spoiler: contributing their spirits so Kouji and Takuya could Hyper Spirit Evolve]] was reused for a couple of episodes during the Royal Knights arc.
** The footage of [=KendoGarurumon=] howling after his Beast Spirit Evolution was re-used a few times. The clip even used different audio for the howl once.
* TheSweatDrop
* SwissArmyTears: Thrice, no less.
* {{Synchronization}}: Susanoomon
* TheTeam: The chosen children soldify as a team over the course of the series. During the Royal Knights arc when only Takuya andKoji are the ones fighting, the others still do their part.
* TechnicolorBlade: Duskmon has a pair of red swords, which he uses when utilizing his Lunar Plasma attack.
* ThemeTwinNaming: Kouichi and Kouji - literally "Light First" and "Light Second."
* ThoseTwoGuys: Bokomon & Neemon.
* ThresholdGuardians: Dark Trailmon and an illusion of Duskmon are this for a despairing Takuya after the team's defeat by the latter.
** The Sakkukumon mini-arc has these for the rest of the characters, each using a given character's flaws against them.
*** Volcamon, who later becomes a shadow version of Beetlemon, calls out J.P. for trying to [[TastesLikeFriendship bribe]] his way into friendships and shows the latter just how alone he was.
*** Karatenmon picks apart Koji's loner tendencies and tells him not to reject allies.
*** Asuramon shows Tommy the flaws of expecting others to help him constantly by turning that exact attitude against him.
*** Ranamon forces Zoe to confront her guilt at lashing out at her OnlyFriend at camp.
* TransformationSequence: Fairly impressive ones that get used as StockFootage.
* TransformationTrinket: D-tectors and Spirits, such that when Gigasmon steals the Kazemon and Kumamon spirits, or the Toucanmon steal their D-Tectors, the kids concerned (which at one point is [[GoodTroiEpisode everyone except Izumi]]) swiftly become TheLoad to their comrades and worry about it.
* TrappedInAnotherWorld: Much less action occurs on Earth than in any other animated season.
* TrashTheSet: [[spoiler:More like Trash The Planet and Its Three Moons. The final battle ''literally'' occurs in the void of space.]]
* TroubledButCute: Inevitably Kouji and/or Kouichi.
* [[ThreePlusTwo Two Plus Four]]: [[spoiler:Takuya and Kouji's final forms required everyone else to give up their ability to transform.]]
** This can really be said of the team after Takuya and Kouji gain the ability to fusion evolve and the others don't.
* UnwittingPawn: A lot of characters turn out to be this during the Sakkakumon and Cherubimon arc. It's implied during Agnimon's fight with [=IceLeomon=] that even the enemies the kids face in Sakkakumon are being controlled or manipulated by Mercuremon.
* VerbalTic: Many baby-level digimon.
* VillainForgotToLevelGrind: How the Royal Knights were eventually defeated.
* VoiceOfTheLegion: [[spoiler:Susanoomon]] has this due to being [[spoiler:a [[FusionDance combination]] of all ten Warriors]], though it sounds more like multiple people talking at once than some kind of audio effect.
* WackyRacing: "Trailmon vs. Trailmon."
** The dub even referenced the TropeNamer by giving Doggymon a fair approximation of [[WesternAnimation/WackyRaces Muttley's]] laugh.
* WeCanRuleTogether: Cherubimon and Duskmon. In fact, Cherubimon was merely using him as an UnwittingPawn and subjecting him to TheCorruption.
* WeirdnessCensor: Demonstrated with this rather brilliant quote from the final episode:
--> '''News Announcer:''' The disturbance was apparently the result of an electrical discharge. When asked why an electrical discharge looked like a giant dragon, the city spokesperson said "That's what electrical discharges do."
* WhatYouAreInTheDark: When the heroes are trapped inside Sakkakumon, each one has to confront something like this. The most extreme example is Junpei, who is tormented by his [[EnemyWithin darker self]] and is willing to [[TakingYouWithMe destroy himself along with it, just to get it to shut up]].
* YouHaveOutlivedYourUsefulness: Arbormon loses his beast spirit to Wolfmon. According to Duskmon, that makes him useless to the evil legendary warriors. Duskmon then disposes of him, giving the horrified kids a taste of what to expect in the following WhamEpisode.
* YouShallNotPass: Sorcermon in episode 13, to hold off the Dark Legendary Warriors and buy the kids time to escape.
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