[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/ygogroup_7488.png]]
[[caption-width-right:300:The [[TitleDrop king of games]] and his TrueCompanions.]]

-> ''"In a Shadow Game, your heart's weakness is what ultimately causes you to lose!"''
-->-- '''Dark Yugi'''

The ''Yu-Gi-Oh!'' manga by Kazuki Takahashi tells the story of Yugi Mutou, who is pulled into the world of high-stakes gaming after completing the Millennium Puzzle and awakening the Pharaoh within, gaining a darker personality known as Dark Yugi. The title of this manga means "Game King" in Japanese and thus it contains a number of games, all of which happen to have at least one thing that's being [[WagerSlave wagered]]. These games are usually played as Shadow Games, games in which the loser receives a dark punishment called a Penalty Game, which may or may not result in death. There is also a strong theme of friendship and unity between the main character and his circle of friends, and also the meeting of hearts through the medium of games.

The first seven volumes have the most variety in games; from then on, the most common game that appeared was Duel Monsters, the [[TabletopGame/YuGiOh Yu-Gi-Oh! card game]], in response to favorable reader reception.

The early episodic stories found in much of the early volumes are collectively referred to as the High School chapters. In Creator/{{Viz Media}}'s edition of the manga, the stories up to Monster World are simply called ''Yu-Gi-Oh!'', Duelist Kingdom to Battle City are called ''Yu-Gi-Oh! Duelist'', and the final story arc is called ''Yu-Gi-Oh! Millennium World''.

The manga was the basis for the [[Anime/YuGiOhFirstAnimeSeries Toei anime]] and NAS [[Anime/YuGiOh Duel Monsters anime]]. ''Anime/YuGiOhTheDarkSideOfDimensions'' takes place six months after the manga (or a year after the anime in the West) and is the first ''Yu-Gi-Oh!'' anime adaptation with direct involvement from Kazuki Takahashi. There's also a two-part continuation of the manga called ''TRANSCEND GAME'' written by Takahashi, which serves as a prequel to the movie.

See also the manga adaptations of the spin-off sequels to the Duel Monsters anime: ''Manga/YuGiOhGX'', ''Manga/YuGiOh5Ds'', ''Manga/YuGiOhZEXAL'' and ''Manga/YuGiOhArcV''.

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!!TROPE START!

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* AbandonedWarehouse: The manga has a warehouse in the Hirutani stories and Mokuba's Capmon game.
* AbsurdlyHighStakesGame: A lot of the games end in death, insanity, or getting trapped in inanimate objects for eternity.
* AbusiveParents:
** Ryuji Otogi's father raised Ryuji to take his revenge for him.
** Seto's stepfather, Gozaburo. One flashback panel of the manga shows him with a dog collar as a little kid while being forced into tons of strict educational regimens for the gifted under his father's strict eye, which was a regular day during his childhood. Gozaburo really did create his worst enemy.
** Jonouchi's father is an alcoholic and apparently owes a lot of money in gambling debts.
** Marik's father treats Rishid like a slave while abusing him, and forces Marik to undergo the tomb keeper ritual.
* AdaptationDyeJob: In-universe example; Mana's Black Magician Girl spirit had brown skin and an Eye of Anubis. In the card game, her skin is light and she wore a pentagram.
* AgentPeacock: Pegasus is this.
* AllThereInTheManual: ''The Gospel of Truth''.
* AlternateContinuity: Certain characters are dead in the manga and alive in the anime, and backstories and personalities are different between adaptations as well.
** Tetsu Ushio (Trudge) somehow appearing completely sane in the spin-off [=5Ds=] also clashes with what happens to him in the first chapter of the manga.
** The 2016 movie ''Anime/YuGiOhTheDarkSideOfDimensions'' isn't necessarily non-canon to the DM anime, but it is first and foremost set in the continuity of the manga.
** The fate of Seto Kaiba. In ''GX'', he is still the president of Kaiba Corp. In ''Darkside of Dimensions'' [[spoiler: he goes into the afterlife to have TheLastDance with Atem and Mokuba becomes the new president of the company]].
* AmuletOfConcentratedAwesome: Yugi's Millennium Puzzle has the soul of a 3,000 year old Pharaoh in it who takes over Yugi's body to play games. Most of the Millennium Items fit this trope.
* AmusementParkOfDoom: Death-T was created just to kill Yugi and friends.
* AnAdventurerIsYou: The character classes that the gang chooses for their party characters during the Monster World RPG have very archetypical gameplay roles, naturally from being based on ''TabletopGame/DungeonsAndDragons''.
** [[TheBeastmaster Beast Tamer Yugi]] is able to use his magic to change an enemy creature's alignment and turn them into one of his TrueCompanions - as long as he rolls a high enough check.
** Jonouchi's Warrior character, like his player, was in charge of the brawn and physical damage output for the party. He also had the highest HP out of all the party members.
** [[ActionGirl Magician Anzu]] wields powerful offensive magic, especially on critical hits.
** Magic Gunman Hiroto deals ranged damage with magic bullets.
** White Mage Bakura, level 13, can heal the entire party of their wounds and cast powerful barriers to block enemy attacks. [[CastFromHitPoints Depending on how powerful he wants the spells to be, it's sometimes at the cost of his own health]].
* AncientEgypt: A large chunk of the characters and artifacts come from this time period. [[spoiler:It's also the backdrop of the final Shadow Game.]]
* AndYouThoughtItWasAGame: Inverted. [[spoiler:What the Pharaoh and company think is the world of his memories, or possibly [[TimeTravel time travel]], in the ''Millennium World'' story arc turns out to be a TabletopRPG game set up by Bakura.]]
* AngelFaceDemonFace: The differences in appearance between Yugi, Bakura, and Marik and when their Dark sides take over is pretty pronounced.
** When Yugi, during the tabletop roleplaying game with Bakura, uses his ability to turn enemy creatures to the good side, they become extremely cute.
* AnimeHair: Yugi is the most famous example and provides the trope image. Almost all the supporting characters tend to be trying to outdo each other in outlandish hairstyles.
* ArcVillain: In order: Shadi, Kaiba, Dark Bakura, Pegasus, Mr. Clown, Marik, Dark Marik, and Dark Bakura as the final villain [[spoiler:in a BigBadDuumvirate with Akhenaden and with [[GreaterScopeVillain Zorc Necrophades behind them]]]].
* ArcWords: "Something you can show, but can't see" gets repeated quite a lot, at least early on. Originally it referred to the Millennium Puzzle, but it's used to refer to many different things since then, by slightly altering the way the line is interpreted.
* ArtEvolution: Many of the early character designs got significantly changed as the manga went on and Takahashi's overall aesthetic changed. Jonouchi's hairstyle changes from a Leonardo [=DiCaprio=]-esque style to the signature Jonouchi style, Dark Yugi appears increasingly less deranged and psychotic-looking, Kaiba goes from being kind of short to one of the tallest characters in the series, Mokuba goes from being chubby and mean-looking to a more Moe appearance, etc. More recent art by Takahashi, including the pieces included in the [[UpdatedRerelease bunkoban]] and illustrations for the card game show a marked improvement in Takahashi's painting ability, making the characters look more realistic.
* ArtifactOfDoom: Millennium Items tend to give their owners awesome PsychicPowers of some sort. However, more often than not, they will also harbor or lead to the development of their owners' evil slide, or at least contribute to their FaceHeelTurn.
* AscendedExtra: Seto Kaiba was originally supposed to be a one-off villain, but got promoted to main antagonist of his own arc when Kazuki Takahashi decided to have Duel Monsters make a reappearance. This role was ultimately what made him become the manga's EnsembleDarkhorse, and ultimately what makes him get another promotion as a main character during the Duel Monsters arcs. The anime adaptations extends his role even further, making him even more popular by extending his significance in filler arcs and rewriting a chunk of the last arc to include him.
* AssholeVictim: Every bully who Dark Yugi fights is this. Special points go to Prisoner 777, whom Dark Yugi sets on fire.
** Bandit Keith gets his hand turned into a gun by Pegasus and is forced to shoot himself.
** [[spoiler:Marik's father was skinned alive.]]
* AstonishinglyAppropriateAppearance: Goes from mild (Dinosaur Ryuzaki and Insector Haga have dinosaur and insect themed Duel Monsters decks, respectively) to bizarre ("Ghost" Kotsuzuka, who looks like a zombie, has an all zombie deck).
* AttemptedRape: What Kokurano clearly planned to do to Anzu after drugging her before Dark Yugi shows up and challenges him to a Shadow Game.
* AuthorAppeal: Did you know Kazuki Takahashi likes games? Because it says so in every volume of the manga.
* AVillainNamedZrg: Dark Master Zorc. [[spoiler:As well as the real Zorc Necrophades.]]
* AxeCrazy: The Chopper Man during the Death-T saga.
** Dark Bakura and Dark Marik. And although well-intentioned, Dark Yugi seemed a little too happy inflicting Penalty Games in the first few chapters.
* BadassAdorable: Yugi. Especially during the Dungeon Dice Monsters saga, where he manages to turn a game around without the Puzzle's help.
* BadassGrandpa: Through background stories, we learn that Sugoroku Mutou, Yugi's grandpa, was a master gambler and game expert back in the day, not unlike his grandson. We see shades of this in the prologue to the Millennium World arc, where in a hat and tuxedo, he conquers the deadly Shadow Games in the tombs which housed the Millennium Puzzle. Some time after that, he was challenged to a Shadow Game by Ryuji Otogi's father in which he bet years of his life and ''won''.
* BadassLongcoat: Dark Bakura's black trenchcoat during the Millennium World arc.
** Seto Kaiba wears long, flowing trenchcoats after he wakes up from his coma after Death-T.
* BadassLongRobe: Thief King Bakura wears a red robe with white trim.
* BadassNormal: Yugi, [[spoiler:manages to take out all three God Cards in one turn against Atem]].
** Jonouchi as well who's the most normal of the main duelists.
* BelievingTheirOwnLies: The phony prophet, Kokurano, in chapter 5.
* BerserkButton: If you don't want to see a very angry Kaiba, don't try to steal his company or kidnap his brother.
** And if you don't want to anger Jonouchi, don't insult him in any way or harm any of his friends.
* BewareTheNiceOnes: Ryou Bakura is a very sweet, shy, polite guy with a SuperpoweredEvilSide that he's only vaguely aware exists.
** The same goes for Yugi. He is nice and weak, until his psychotic side wakes up.
* BigBad: Dark Bakura serves as this for the whole series, working out an evil plan to [[spoiler:resurrect Zorc Necrophades]]. While other characters may serve as an ArcVillain, Dark Bakura's scheme goes on throughout the series.
* BilingualBonus: The Egyptian text throughout the series is accurate. [[spoiler:Atem's name is written as "Atemu"]] and the carvings on Rishid's face and Malik's back are genuine hieroglyphs.
* {{Bishonen}}: Marik Ishtar, Ryou Bakura, and Ryuji Otogi. The latter two even share the same fangirls at different points in the manga.
* BitchInSheepsClothing:
** Kaiba in his first appearance. He pretends to befriend Yugi, but has Yugi's grandfather's Blue Eyes White Dragon switched with a copy. When Yugi figures this out and calls him out on the switch, Kaiba loses the facade and whacks Yugi in the face with a briefcase.
** Kaiba does it a second time during Death-T. He pretends that he has forgiven Yugi and simply wants to let him and Jonouchi have a good time; once Yugi discovers that his grandfather is in the battle arena, Kaiba drops the pretense of being nice.
** Nezumi claims that a gang of bullies attacked him and that he needed help in dealing with them. In fact Nezumi was ordered by Hirutani to lure them to the abandoned warehouse so that Jonouchi could be forced to re-join Hirutani's gang.
** Dark Bakura pretends to have reformed post-Monster World, but it was a lie to lure Yugi and friends into his final game. Yugi is ''devastated'' when he learns the truth.
** Marik pretends to be nice and friendly as Namu, but is scheming against Yugi while having Rishid pose as Marik to avoid suspicion.
** Ms. Chono. To the teachers and staff, she's an incredibly nice and beautiful teacher who does incredibly well in getting her students to behave, and the only flaw she has is her poor track record for arranged dates and marriages always being called off. To the students, however, she is the "wicked witch of expel" who expels students for even the slightest twitch and has taken delight in starting dates with men just to tug at their heart strings and then shatter them to pieces.
* BlackCloak: Marik Ishtar and the other Ghouls wear hooded robes and cloaks.
* BlackMagicianGirl: TropeNamer due to the "Dark Magician Girl" Magic & Wizards card and Monster Ka, which is actually named "Black Magician Girl" in the Japanese version.
* BlandNameProduct: Most of the fads, toys, and games in the early parts of the manga. Magic & Wizards (Duel Monsters) is clearly a BlandNameProduct of TabletopGame/MagicTheGathering, as is Dragons, Dice, & Dungeons (Dungeon Dice Monsters) to ''TabletopGame/DungeonsAndDragons''.
** Sory and Panazonic.
* BlindIdiotTranslation:
** The Viz translation of the manga is very inconsistent with naming. A notable example are the times where they make Mokuba call his big brother "Kaiba" when he called him "nii-sama" in the original version.
** Possibly the worst offender is the couple of times they referred to Mai Kujaku as Mai Shiranui.
* BoardGames: Capsule Monster Chess, the Devil's Board Game, and Dungeon Dice Monsters.
* BookEnds:
** For Dark Bakura's involvement in the overall story. [[spoiler:Both the first and last games the Pharaoh plays against him are [=RPGs=] with the souls of his friends at risk]].
** [[spoiler:Yugi's winning card in the last duel of the series is Golden Sarcophagus; it's [[LampshadeHanging pointed out]] that the card looks just like the box the Millennium Puzzle was in, [[InvokedTrope and that the box that brought Yugi and the pharaoh together would be the very thing to bring them apart.]]]]
* {{Bowdlerise}}:
** Starting around volume nine or so, Viz started censoring certain bits of the English manga, like Jonouchi giving the finger to Bandit Keith. They also went back to the early volumes to censor bits of dialogue like Ms. Chono's reference to condoms.
** The Viz translation also initially used Marik's ''dub'' reason for wanting to defeat Yugi rather than his reason in the original before fixing it in subsequent volumes, turning it into a bizarre and unintentional case of CharacterizationMarchesOn.
* {{Brainwashed}}: The main power of the Millennium Rod. It can control multiple people at once. Marik uses it to brainwash Anzu, Jounouchi, the normal Bakura, and pretty much his whole organization of thieves.
* BrainwashedAndCrazy: Marik does this to his enemies, especially Jonouchi and Anzu.
* BreakoutCharacter: The Black Magician Girl is far more popular than any other monster from the original series save for the iconic Blue-Eyes White Dragon and Black Magician. She's even playable in some of the video games.
* BreakoutVillain: Kaiba and the card game were meant to be seen only twice, and went on to have major story arcs revolve around them.
* BreakTheHaughty: Kaiba gets this a lot.
** Anyone who is foolish enough to face Dark Yugi gets this.
* BrokenBird: Mai Kujaku.
* BroodingBoyGentleGirl: Priest Seto and Kisara in Ancient Egypt, Dark Yugi and Anzu in the main timeline.
* ButNowIMustGo: [[spoiler:Atem goes tot he afterlife after losing the Ceremonial Battle.]]
* CallBack:
** The finals of Duelist Kingdom make several references to Shadi, and to Death-T.
** Chapter 9 of the manga, where Kaiba and Duel Monsters first appear, is titled "The Cards with Teeth". Six volumes later, the chapter where Kaiba recovers from his Mind Crush-induced coma and duels Yugi once more is titled "The Cards Bare Their Teeth".
** During Dark Bakura's battle against Dark Yugi on Kaiba's blimp, Yugi comments that he "never expected to play a game of cards with Dark Bakura." Dark Bakura replies with, "Heh, I had fun playing tabletop role-playing games with you," referencing their battle in the Monster World arc. [[spoiler:During the Millennium World arc, Dark Bakura reveals that the Monster World gane was a warm-up for the Shadow RPG]].
* CallForward: The first chapter of Millennium World is set before the first chapter of the series. Sugoroku Muto is a skilled gamer that says that if he ever loses a game, he'll trade his suit and fedora for a pair of overalls and a bandanna, and will open a game store. Apparently he lost at some point.
* CallingYourAttacks: When Marik uses Lava Golem, summoning it to Jonouchi's side of the field, he tells Jonouchi that its attack is called "Golem Volcano". Jonouchi insists that since it's on his side of the field, he'll name the attacks, and hits Marik with a "JONOUCHI FIRE" instead.
* CalvinBall: Duel Monsters is this in Duelist Kingdom, since rules that would be nonexistent happen frequently, such as Kazejin blowing away an attack yet it still affecting the other monsters, Normal Monsters having effects, and Yugi activating a spell from his hand during an opponent's turn. In general, the field system that Pegasus set up for Duelist Kingdom seems to draw heavily on role-playing game logic. Battle City was better about this but still had odd moments here and there (it's especially bad in Jonouchi's duel with Kajiki Ryota, whose entire strategy ''still'' revolves around nebulous field advantages).
** Quick, how many sacrifices does Obelisk the Tormentor need to be summoned? It all depends on how many pages Kazuki Takahashi feels like drawing for this particular chapter.
* CameBackStrong: [[spoiler: During the Memory World Shadow RPG, Priest Mahado is killed by Thief King Bakura and comes back later as a Monster Spirit, an even stronger sorcerer.]]
* CaptainErsatz: An assassin hired by Kaiba during the Death-T arc looks remarkably like Duke Togo of ''{{Manga/Golgo13}}''.
** Zombire is a fairly transparent takeoff on Comicbook/{{Spawn}}, and the favorite superhero of a minor character.
* CardGames: Duel Monsters and Dragon Cards. Duel Monsters in particular plays a large role in all arcs concerning Kaiba, and eventually became the main focus of the anime adaptation.
* CarnivalOfKillers: Seto Kaiba creates an almost literal carnival of killers with "Death T", the "Theme Park of Death" he made specifically for Yugi.
* CastFromHitPoints: During the Monster World RPG, WhiteMage Bakura converted his hit points to magic points in order to cast a barrier spell to protect his friends from Zorc's attack.
** And in the Memory World RPG, the [[HitPoints Ba Gauge]] served as both hit points and magic points for the character cards, since the real life versions of these characters used their life energy (Ba) to summon and power-up their Monster Spirits (Ka).
** Within Duel Monsters a few spells, traps, and monster abilities require the player to sacrifice some of his/her life points.
* {{Catchphrase}}: Dark Yugi's "Game Start!" would count as one, though it's said a few times by Dark Bakura as well.
* ChainedByFashion: Exodia's pieces wear chains to limit his power. Getting all five results in an automatic win.
* ChainsawGood: The Chopman from Death-T uses a chainsaw as a weapon.
* CharacterDevelopment: The Yugis get the most development, but everyone gets a decent amount at the least.
* ChastityCouple: Mai and Jounouchi. Also Yugi and Anzu, though the former does have a crush on the latter, and the latter has a crush on the former's SuperPoweredEvilSide.
* CheatersNeverProsper: The whole nature of Shadow Games. Cheat during one of Dark Yugi's Shadow Games, and you'll be subject to horrible MindRape. Also, very early on, Kaiba tries to sneak Grandpa's stolen Blue-Eyes White Dragon that was in his pocket into his hand during the duel, only for it to disobey him and cost him the game.
* ChekhovsGun:
** In one of the early chapters, Yugi's Puzzle psychically located Jonouchi's whereabouts when he was captured by his old gang. It seemed like a one-off power never to be mentioned again, until he uses it to track down Jonouchi during Duelist Kingdom.
** Dark Bakura's avatar in the Monster World RPG is Dark Master Zorc. [[spoiler: The main antagonist of the final arc turns out to be an ancient demon that Dark Bakura is trying to revive, also named Zorc]].
** When a character specifically singles out or is shown acquiring a new card before a duel, it's bound to be important in the upcoming match. In the Duelist Kingdom Arc Jonouchi is seen trading for Sword and Shield, which he later uses against Ghost Kotsuzuka to pull off a win. At the same time he got Kunai Whipchain and Salamandra, which he used to defeat two troublesome monsters in the team duel with the Meikyu Brothers, as well as Baby Dragon, which combined with the Time Wizard given to him by Yugi ended up finishing off Mai in his first duel with her.
** Kuriboh made a blink-and-you'll-miss-it appearance in Yugi's duel with Haga to diffuse one of Haga's traps, before Yugi brought it back in in his third duel with Kaiba to hold off Kaiba's Blue-Eyes Ultimate Dragon.
* CherryTapping: In Jonouchi's duel with Esper Roba, Jonouchi wins by having ''Baby Dragon'' attack Roba directly. It's not the weakest monster by a longshot, but it's still pretty embarrassing.
** Yugi has a thing for using weak monsters to stymie his opponent. He once managed to stall Kaiba's Blue-Eyes Ultimate Dragon with Kuriboh, labeled as the weakest monster in the game. Whenever he played Capsule Monsters, the game was rigged so that Yugi's monsters were all weaker than his opponent's, yet he destroyed them anyway.
* ChuckCunninghamSyndrome: Tomoya Hanasaki, Yugi's friend from the early chapters who had an obsession with the American superhero, Zombire. Despite having a whole character development chapter for himself and being close enough to the main group that he offered to look after Yugi's grandpa in the hospital during the Death-T saga, he's never mentioned or seen again after that.
* TheChessmaster: Kaiba in the Death-T arc. He even has the chessboard.
* ClothesMakeTheSuperman: Averted in the Zombire story.
* ColdBloodedTorture: Dark Marik prefers to make his enemies suffer as much possible before their deaths and rub it in while he's doing so. His Penalty Games also reflect this, trapping Mai in an hourglass full of scarabs that slowly devour her skin.
* CoolBigSis: Mai Kujaku.
* CombatSadomasochist: Dark Marik is characterized by this trope. Not only do the conditions of his Shadow Games satisfy his sadism, but the conditions also satisfy his lust for pain. While the good guys have their stamina destroyed due to the pain of feeling their monsters' limbs being chopped off, Marik wallows in the pleasure.
* ContinuityNod: When Jonouchi uses Kaiba's Duel Disk in Duelist Kingdom, he compares it to using a yo-yo, stating that he's ''good'' at using yo-yos, referencing the yo-yo battle in chapters 48 and 49.
* CoolAndUnusualPunishment: The price for losing or cheating one of the Pharaoh's Shadow Games is to receive a "Penalty Game" that would deliver LaserGuidedKarma. This ranged from seeing nothing but hallucinations of money, to having ''your vision censored like a mosaic''.
* CosmicChessGame: [[spoiler: What Dark Yugi and Dark Bakura are revealed to be playing in the Millennium World arc. It isn't actually Ancient Egypt we were seeing; it was a recreation done as a tabletop game.]]
* CovertPervert: Yugi. In the first manga arc, right after he's made friends with Jonouchi, they're seen talking about some porn videos they've been exchanging. Talking about 'squinting at the pixels' really leaves little else it can be. He's also shown imagining someone's panties after hearing what Anzu has to say about boys peeking up girls' skirts while playing basketball. Even in the Millennium World Arc, Yugi and Jonouchi are still exchanging videos...
* CrapsaccharineWorld: Easier to spot in the early chapters, where it seemed like every corner of Domino City was populated by bullies (or worse) out to get our heroes, and adult authorities are either [[AdultsAreUseless useless]] or nonexistent. After the card games took over, this lessened, with most of the wrongdoings being concentrated into a couple magically-powered BigBads and their henchmen.
* CriticalFailure: In the Monster World RPG arc, Ryou Bakura plays a tabletop game with Yugi and his friends, wherein they use percentile dice for every roll. When Dark Bakura takes over, rolling a 99 carries the penalty of having your soul trapped in your figurine.
* {{Crossover}}: Dark Yugi apparently lives in Manga/BoboboboBobobo's afro. And in Issue 2 of the American ''Shonen Jump'', Kazuki Takahashi drew ComicBook/{{Hellboy}} (he's a big fan), and Mike Mignola drew Hellboy in a Dark Yugi shirt in response.
* CurbStompBattle: A ton of them throughout the series.
** Various games Dark Yugi played with the earlier villains involved his opponents having a pretty much sealed fate from the beginning.
** The first Kaiba vs. Jonouchi duel ended with Kaiba only taking 600 damage.
** The Kaiba/Pegasus battle became one as soon as Toon World was played.
** Otogi to Yugi during their game of Dungeon Dice Monsters/DDD, until Dark Bakura intervenes and gives Otogi a HannibalLecture.
** The first battle between Dark Yugi/Kaiba VS two of Marik's Ghouls. Kaiba summoned Lord of Dragons AND special-summoned all three Blue Eyes and a spare dragon in just the first move, then summoned Obelisk on Round Two and sacrificed his remaining monsters to activate Obelisk's TotalPartyKill special ability to defeat both opposing players.
** The Sun Dragon of Ra versus basically anything. Except for Mai's CriticalFailure attempt at using it.
** {{Final Boss}}es Dark Master Zorc [[spoiler: and his precursor Zorc Necrophades]] in both the Monster World RPG and [[spoiler: the Shadow RPG of the Millennium World arc]] pretty much beat down the parties with little effort and would have totally did a TotalPartyKill in both instances had it not been for unexpected surprise inferences.
* CutAndPasteTranslation: The Viz translation of the manga has moments of unnecessary changes, from having Mokuba call Seto "Kaiba" regularly to having Jonouchi doubt Yugi can win in the final battle when in the manga he said the opposite. Other lines, such as Kaiba "carrying the cross of collectible card game defeat" were added because the translators thought it'd be funny.
* DarkerAndEdgier: When compared to its two anime adaptations, which tone certain things down, including the atmosphere. Most of Dark Yugi's Penalty Games in Toei's anime are turned into illusions, while they are turned into Mind Crushes in the Duel Monsters anime. More characters are also KilledOffForReal in the manga. [[spoiler:Particularly, Pegasus and Bandit Keith]].
* TheDarkSide: Many characters in Yu-Gi-Oh! fall into this, usually by trying to use an Artifact of Doom. Dark Yugi was even part of it at first before softening up. [[spoiler:Pegasus explicitly says that there is an evil influence inside all of the Millennium Items, and the Millennium World arc reveals that the evil influence is Zorc Necrophades.]]
* DeadAllAlong: [[spoiler:It's heavily implied that Shadi has been dead long before the start of the first chapter.]]
* DeathByChildbirth: Mokuba explains that his mother died shortly after his birth. Whether this was by childbirth or not is not specified, but [[PromotionToParent the result stays the same.]]
** Same thing with Marik's mother.
* DeathByIrony: Most of Dark Yugi's Penalty Games, though not ''all'' of the victims necessarily die and they get less extreme as the series goes on.
** One particularly disturbing example that doesn't involve death is his Penalty Game towards a crooked director. Earlier in the chapter, the director mentions using a mosaic to filter out the beaten Yugi's face. When he suffers his Penalty Game, he is forever blinded with a mosaic over his eyes.
** Another good example would be during the Duelist Kingdom arc, where the Player Killer of Darkness threatens to kill Yugi with a noose if he lost and throughout the whole game, tries to seek safety within the darkness. He ends up being hanged by a noose at the end of the game, surrounded by nothing but darkness. This would be Dark Yugi's final Penalty Game before he decides to stop using them.
* DeathTrap: Kaiba's sadistic "amusement park," "Death-T," is basically a long series of increasingly difficult death traps designed to defeat and kill Yugi.
* DefeatMeansFriendship: Mokuba Kaiba, though it takes two defeats before he warms up to the heroes.
** Ryuji Otogi in the ''Dragons, Dice, & Dungeons'' arc. Defeating him at his own game and saving his father from the fire despite his father being a major {{Jerkass} to him and Yugi) only cemented the friendship.
** [[spoiler:Marik Ishtar]] later on after his evil side is defeated.
* DefrostingIceQueen: Mai Kujaku during the Duelist Kingdom saga.
** Kaiba is a male example. He becomes more amiable and less openly insulting towards the others, except for Jonouchi.
* DidDoTheResearch: Though occasionally the exact details are fuddled, the mythological concepts explored throughout the franchise show that Takahashi did his research.
* DiscOneFinalBoss: Seto Kaiba and Death-T are a conclusion to the episodic stories, leading the way for longer, detailed story arcs to play out.
** During the Millennium World arc, [[spoiler: Thief King Bakura serves as one for Zorc Necrophades in Dark Bakura's Shadow RPG.]]
* DisproportionateRetribution: In the early manga. For example, the leader of a gang that broke Yugi's class' stand and injured him was blown up by Dark Yugi.
** Dark Yugi does this all the time. He punched through a kid's soul for being a thieving coward, and made a shop owner poison himself for running crooked... there are a ''lot'' of examples.
** In Kaiba's first appearance, he stole the Blue-Eyes white Dragon and hit Yugi over the head with his briefcase when he noticed the switch, then tried to cheat in the following card game. As punishment, Dark Yugi gave him the Experience of Death Penalty Game, where he saw himself trapped in a card and was torn to shreds by monsters over and over. Kaiba then spends the next six months putting together a ridiculously elaborate series of death traps to kill Yugi, then kidnaps Yugi's grandpa and forces ''him'' through the same experience as bait. When Yugi's friends arrive to help him, including Honda's baby nephew, Kaiba tries to have them killed too.
** Mokuba challenged Yugi to a game of Capsule Monsters at gunpoint to get revenge for Kaiba's first loss, and then later played a very unorthodox rigged version of Russian Roulette with Yugi and Jonouchi for ''his'' first loss.
* DrivenToSuicide: Gozaburo Kaiba jumps out a window after Seto takes over Kaiba Corporation to teach him that losing means death.
** While we never see the outcome, [[spoiler:Marik uses his Millennium Rod's magic to scan Pandora's mind for any past suicidal thoughts/feelings and brings them onto the surface tenfold after Pandora lost to Yugi. Marik is sure that his former minion will definitely commit suicide once he regains consciousness.]]
* DubInducedPlotHole:
** The Viz translation had it that Yami Marik was around for 1,000 years, while in the original he was around for "a long time." This led to speculation as to whether Yami Marik was an Item-connected spirit or not.
** Marik's motivations also line up with the English dub at first, wanting to take the Pharaoh's power rather than kill him.
* DubNameChange: The manga-exclusive characters received English names for the ''Dungeon Dice Monsters'' video game.
** The Viz translation uses the dub name Maximillion J. Pegasus instead of Pegasus J. Crawford (possibly because Pegasus is an American himself).
* DuelsDecideEverything: Dark Yugi would always play a game to resolve a conflict. Eventually, Duel Monsters was the most common game.
* DysfunctionJunction: Several characters experienced a tragic and/or depressing event in their life, [[spoiler:especially the villains]].
* EarlyInstallmentWeirdness: Kaiba originally had no special bond with the Blue Eyes White Dragon. In his first appearance, the card refused to obey him because he stole it; in the second, he acquired his three copies through extortion and destroys the fourth. Not exactly the sort of behavior conducive to a ReincarnationRomance.
** Dark Yugi mentions different levels of Shadow Games in one chapter. This is never mentioned again, but [[FridgeBrilliance Dark Bakura and Dark Marik probably use high-level ones.]]
** The Dragon Cards are dangerous artifacts that grant the wielder the same abilities as the Millennium Items, despite being completely unrelated to them. (Note that the later anime series, which also do this, are ''not'' canon to the manga.)
*** Oddly enough, The Devil's Board Game in the Dungeon Dice arc (which takes place later in the manga) shares this exact same characteristic. Sugoroku Mutou, who was not a Millennium Item wielder, was able to play a Shadow Game and give Otogi's father a Penalty Game by playing the Devil's Board Game. Unlike the Dragon Cards though, this game was said to have come from Egypt (which is where most of the "Shadow Game"-magic in this series originates from), as opposed to... ''China''.
** Until the cards and ''Duel Monsters'' anime were introduced, the ''Yu-Gi-Oh!'' world doesn't entirely revolve around the [[SeriousBusiness children's card game]], it's initally about friendship and gaming in general, as seen in this manga - seen as an entirely different world altogether. The rest of the franchise still stresses friendship to a relative degree, but the general gaming part? Not so much.
** Early arcs used completely different rules for playing Duel Monsters (if there even were any, with the series often functioning with NewRulesAsThePlotDemands) than Battle City, playing more like an RPG than a trading card game. There are too many to list, but examples include Yugi being able to "beach" Ryota Kajiki's sea creatures, being able to target separate parts of monsters, attacks being able to "miss," etc.
* EasilyForgiven: Subverted with Jonouchi towards Kaiba and Shadi. He always brings up Death-T in regards to Kaiba and brings up Shadi's Trial of the Mind when Bobasa, supposedly Shadi's underling, shows up. It's understandable since he's almost killed in both.
** Played straight with Yugi though. After all the hell Kaiba has put him through, Kaiba ends up receiving the least fatal Penalty Game Dark Yugi has ever given anyone, one that actually makes him a better person.
** Also, [[spoiler:everyone forgives Marik despite the fact he put them through a living hell, even when his SplitPersonality wasn't at surface]].
* Myth/EgyptianMythology: Used quite extensively, usually when it comes to names. Used even more extensively during the Millennium World arc. A more early example would be the demon Ammit, which the Millennium Scale has the ability to summon in its Shadow Games and when it's used to judge a person's soul.
* EnemyWithin: Dark Marik and Dark Bakura to their good halves, though Marik was initially bad to begin with.
** [[spoiler: Priest Seto after High Priest of Darkness Akhenaden merges his soul with his in order influence Seto to overthrow Pharaoh Atem. Seto manages to overcome it with the help of Kisara's spirit, though.]]
* EnvironmentalSymbolism: Whenever Shadi [[JourneyToTheCenterOfTheMind goes into someone's Soul Room]] with his Millennium Key, which reflects their personality and mental state.
* EvilCounterpart: The Millennium Ring/Dark Bakura serves this role to the Millennium Puzzle/Dark Yugi. Especially in his first appearance, where Dark Bakura appeared and inflicted a Penalty Game on a teacher who was picking on Ryou, much like how Dark Yugi appeared and inflicted Penalty Games on bullies who tried to do harm to Yugi and his friends. The difference? Dark Bakura uses his host to serve his own ends, twisting his wish of playing games with his friends by trapping their souls into game figurines for all eternity, and not giving impaling body parts to silence his host a second thought. Contrast to Dark Yugi, who only sincerely wants to protect Yugi and his friends and genuinely cares for Yugi's well-being.
* EvilVersusEvil: The duel between Dark Marik and Dark Bakura is this.
* ExactlyWhatItSaysOnTheTin: A lot of the cards, like "Red-Eyes Black Dragon," "Man-Eating Treasure Chest" and "Dark Magician," just to name a few.
* ExtraEyes: Pegasus' Thousand-Eyes Restrict.
* ExtremelyShortTimeSpan: Though the series itself lasts more than a year in-universe time, no individual arc takes longer than three days. In fact, there is the strange situation in which Battle City (the longest arc by number of chapters) is actually one day shorter than Duelist Kingdom (the longest arc in-universe).
* EyeScream: The manga seems to love this trope. [[spoiler:Pegasus and Akhenaden (as the owners of the Millennium Eye)]] have pretty gruesome moments. Then there's Jonouchi stabbing Zorc in the eye during the Monster World arc in the manga.
* FailureIsTheOnlyOption: Even though they're playing a game, of which the consequence of losing would normally only be a hit to the loser's ego (if that), the main characters are frequently involved in "shadow games" where the gist is losing = death, making Failure Is the Only Option (for the villains)/Boring Invincible Hero played straight
* FieldPowerEffect: Duel Monsters/Magic & Wizards has various boosting and nerfing cards, as well as terrain.
* FightingSeries: Using various games instead of punches, though Jonouchi and Honda could land a good smack down when the situation calls for them to let loose.
** Amusingly, Chapter 25 has Yugi conquering a FightingGame at the arcade, which ends with him getting beaten up by a Bruce Lee fanatic (and getting his Puzzle stolen), leading to Jonouchi playing a more physical fighting game with the perpetrator outside.
* FiveBadBand: You could make a case for Pegasus and his Player Killers if you wanted.
* FiveManBand: As it applies to the manga.
** TheHero: Yugi Mutou/Dark Yugi.
** TheLancer: Katsuya Jonouchi.
** TheBigGuy: Hiroto Honda.
** TheChick: Anzu Mazaki.
** TheSmartGuy: Ryou Bakura (Dark Bakura acts as TheMole).
** SixthRanger: Ryuji Otogi. Also, Seto Kaiba... [[TheRival sort of]]. In retrospect, Ryou fills this role rather nicely during the Monster World arc.
** And as a temporary role, Honda's little nephew Johji acts as the TagalongKid during Death-T.
* FlawExploitation: Dark Yugi's Shadow Games, more notably his early ones, had him play on his opponent's inherent flaws in order to win. Appropriately, Dark Yugi's final (self-initiated) Shadow Game in Duelist Kingdom returned to form with this, with Dark Yugi playing on Player Killer's DirtyCoward tendencies of hiding in the shadows even in Duel Monsters and scaring him by verbally making it a TimedMission that will end in him being hanged (which comes true).
%%* {{Foreshadowing}}: Takahashi managed to sprinkle a lot of hints towards later arcs during the course of the manga's run. For example, the final StoryArc, Pharaoh's Memory, is foreshadowed in ''volume two''.
* FreudianExcuse: [[spoiler: The whole reason Thief King Bakura tries to summon the Great God of Evil Zorc in the first place is because he saw the Kul Elna genocide firsthand and was its only survivor, trying to enact revenge on the previous Pharaoh, his son, and his royal court by killing everyone using the very Items they created.]]
** Also Seto, arguably, given his orphaned childhood and [[AbusiveParents history with Gozaburo]].
* FriendlessBackground: Before Yugi finished the Millennium Puzzle, his only friend was Anzu.
* FriendshipMoment: They're frequent in this manga, since friendship is the main message. And they're all really heartwarming.
* FunHatingConfiscatingAdult: A teacher not only confiscates a toy from Yugi, but threatens him, Jonouchi and Honda with expulsion if they can't find where he hid it within a time limit. [[spoiler: Other Yugi triggers the toy's beeping, which reveals that the vain teacher hid it under his wig. And reveals to everyone that the teacher is actually bald.]]
* FunSize: Yugi Mutou and Dark Yugi.
* TheGameComeToLife: During the Monster World arc, Yugi and his friends ''become'' the pieces of the tabletop roleplaying game they were playing with Dark Bakura. Also, the Shadow Game versions of Duel Monsters feature the monsters coming to life via Millennium Item shadow magic. In general, the very nature of Shadow Games have the potential to produce this with any game.
* GameMaster: Dark Bakura appears as this. Of the [[KillerGameMaster evil]] variety. Talk about taking the fun out of Tabletops.
** The normal Bakura may be a better version of this, but we never actually get to see him DM-ing a game. He's definitely an avid DM, though, as Anzu and Jonouchi had to drag him out of bed during the first day of Battle City since he stayed up all night writing a scenario for a TRPG.
* GameWithinAGame: In-Universe example... kind of. [[spoiler:Yugi plays a Shadow Game of Magic & Wizards/Duel Monsters with Dark Bakura (Mind Parasite) while he was an NPC in Dark Bakura's Shadow R.P.G... a Shadow Game within a Shadow Game. So while Dark Yugi was duking it out with Dark Bakura's main body at the tabletop, Yugi was playing cards (which were [[RealityWarper mind-conjured]]) with Parasite Bakura within the Memory World role-play]]. Though, considering that [[spoiler:was their only way of replicating the ''Videogame/{{Persona}}''-esque "battle system" that the Egyptian characters were using within the game (which the card game was based on anyway, not to mention their Life Points acted as their [[HitPoints Ba Gauge]]),]] whether or not this qualifies is up to you.
** Imagine characters [[spoiler:playing TabletopGame/MagicTheGathering in TabletopGame/DungeonsAndDragons]].
* GenreSavvy: During the Millennium World story arc, there's a moment where Yugi disappears while the other characters are still discussing what to do to look for clues to find the other Yugi and/or his true name. When Anzu asks where he went, Honda said Yugi went to the tavern to collect information, since [[spoiler:a tavern is ''the'' place to collect information in role-playing games. Jonouchi calls him an idiot and gets pissed because they're not in a game. Even though they actually are in a role-playing game]].
* GeoEffects: Duelist Kingdom's version of Duel Monsters/Magic & Wizards has "Field Power Bonus", but dies out to only Field Spell Cards by the finals.
* AGodAmI: Ms. Chono refers to herself as the goddess of the classroom at one point.
* GratuitousEnglish: In the Japanese manga, Pegasus J. Crawford spouts random English from time to time, being American.
** In the Japanese edition of the manga, the Millennium Items are referred to as the "''Sennen'' Items" (''Sennen'' Puzzle, ''Sennen'' Ring, etc.), "Sennen" meaning "Millennium" in Japanese. Japanese Pegasus still calls his the "''Millennium'' Eye", not the Sennen Eye. The other characters occassionally do as well.
* GreaterScopeVillain: [[spoiler:Zorc Necrophades, the being that the Pharaoh originally destroyed 3000 thousand years ago. He is the dark intelligence described by Pegasus that is in the Millennium Items, and Dark Bakura is trying to release him.]]
* {{Greed}}: The first chapter of the manga presents this with the hall monitor, Tetsu Ushio. He tries to become Yugi's bodyguard to extort money from him. Dark Yugi challenges him to a Shadow Game in which the players use a knife to stab as many bills of money from their hands as they can, without stabbing their hands. When Ushio's greed got out of control, he couldn't control the force of his hand and tries to stab Yugi instead. For cheating, he receives a Penalty Game instead, in which he is made to think piles of leaves and garbage is money, making him look like a lunatic in public.
** Because of his greed, Professor Kanekura failed Shadi's "Weighing of the Heart" Shadow Game using the Millennium Scale and his soul is eaten by the Egyptian demon, Ammit.
** In chapter 8, Yugi plays a Shadow Game against the shoe store owner, who hired street punks to steal back sneakers he had sold to Jonouchi. The game involved getting the most coins out of the sneaker without getting stung by the pet scorpion in it. For each coin he got, the larger the sum of the money the store owner would receive if he won the game. The store owner's greed causes him to hastily grab all the coins inside the sneaker, and gets stung by his pet scorpion which he tried to stab seconds before.
* HalfHumanHybrid: Yugi's character in the Monster World RPG is a half-elf.
* HandStomp: Thief King Bakura drops the Pharaoh into a gorge by doing this, causing the Memory World to go dark.
* {{Homage}}: The Magic & Wizards/Duel Monsters card game was originally intended as a homage to ''MagicTheGathering'', of which Takahashi is a fan.
** Takahashi is also a fan of ''TabletopGame/DungeonsAndDragons'', which Bakura's Tabletop {{Role Playing Game}}s and Otogi's Dungeon Dice Monsters are based on.
** Zombire appears to be a homage of Comicbook/{{Spawn}}.
** An important plot device of the entire series, the concept of "Penalty Games" (the Japanese term being "Batsu Game"), is inspired by the real life Penalty Games used in Japanese ''owarai'' stage comedy and variety shows, which involved losers of certain challenges and bets to experience rather unpleasant things. They're not lethal or horrifying like they are in Yu-Gi-Oh! - they're actually pretty funny because of the reactions - but are humiliating to the recieiving end of the punishment nonetheless.
* HealthcareMotivation: Jonouchi's reason for tagging along with Yugi on his trip to Duelist Kingdom: To save his sister's eyesight.
* HeelFaceTurn: Ryuji Otogi, Seto and Mokuba Kaiba, and Marik's good half. During the Monster World RPG, Pokii and Pao are monsters that were brainwashed using Yugi's abilities to turn good.
** HeelFaceRevolvingDoor: Dark Bakura to Yugi. It's never genuine and is all part of his plans. Yugi becomes weary after the Marik incident, but has no choice but to except the Millennium Items offered to him.
*** On the other hand, it seemed like Yugi really did try to have faith that Dark Bakura is able to have a change of heart and genuinely wanted to help his other self regain his memories. When Dark Bakura reveals who is ([[spoiler: A part of Zorc, not ''just'' the spirit of the Thief King]]) and why he helped Yugi gather the Millennium Items in the first place, Yugi visibly feels betrayed, "I trusted you!".
* HeroicSacrifice: Ryou Bakura in the Monster World RPG arc.
* HilariousInFlashback: In a flashback to his younger days, Sugoroku declares that if he ever loses a game, he will give up adventuring and will wear overalls for the rest of his life. He must have lost at some point.
* HiveMind: [[spoiler: Dark Bakura's personality within the Millennium Ring is the Thief King's soul that has been consumed by the influence of Zorc, meaning he has become a part of Zorc. And by essentially infecting certain objects with portions of his soul like he did with the Millennium Puzzle and his role-playing dice, he further spreads Zorc's influence in a way. At the same time, when Akhenaden made the contract with Zorc to become the High Priest of Darkness, he also became a part of Zorc.]]
* HopeCrusher: Ms. Chono lives to crush the hearts of men, and delights in expelling students on technicalities.
* HotBlooded: Katsuya Jonouchi.
* HotTeacher: Ms. Chono, though the students note she wears too much makeup.
* IAmYourOpponent: Frequently said by Dark Yugi whenever he emerges when Yugi's friends are in danger.
* IdiotBall: Despite all the weirdness Yugi & Co. have experienced (magic multiple personalities, shadow games, Kaiba Land, etc.) when Bakura tells them everyone who plays "Monster World" with him goes into a coma, they presume it's a coincidence and insist he play anyway. Even after the mean gym teacher suddenly goes into one!
** During Death-T, in that room where the living Tetris blocks were falling down and Honda's jacket gets caught between the blocks, why couldn't he have just ''taken it off''? Granted, that seems to be the case a few chapters later when you see him alive and well, but still...
** The potential hazards of the Shadow Game with Dark Marik against Dark Yugi could have been avoided if Dark Yugi had started his own Shadow Game instead, within rational conditions. It wouldn't have contradicted the character development he received after his battle with Pegasus, as losers of Shadow Games don't always have to be subject to a Penalty Game (which Dark Yugi decided to stop doing). In fact, he could have done this from the outside to keep Mai and Jonouchi from getting hurt by Marik's Shadow Games in the first place, like when he secretly started a Shadow Game with Ms. Chono during class. Though there wouldn't be much of a plot or conflict otherwise.
* IGotBigger: By the end of the story, Yugi is noticeable taller than he was at the beginning (though he's still shorter than his friends).
* IKnowYourTrueName: "Names are power." [[spoiler:The key to winning Dark Bakura's ultimate Shadow RPG was learning Dark Yugi's true name, Atem.]]
* InformedAbility: Despite claiming to be an expert at all games, we only ever see Kaiba play Duel Monsters and chess. The only thing that tells us of his prowess at gaming is his high scores on every arcade machine at the Domino Arcade.
** It's mentioned in the manga that the arcade high scores are linked, so he has the highest score on all those games in all of Japan.
* InnocuouslyImportantEpisode: Most events of the series can be traced back to Yugi's first defeat of Kaiba, which is rather low-key in the grand scheme of things (all Yugi wanted was to get his grandfather's Blue-Eyes White Dragon back) and at first appears no more important than the other games against [[MonsterOfTheWeek Monsters of the Week]], yet leads to the events of Death-T, and from there to Duelist Kingdom and then Battle City, which in turn provides Yugi with important information that he needs for the Pharaoh's Memory.
* JekyllAndHyde: The relationship between Yugi and Dark Yugi started out like this in the manga, as did the relationship between Bakura and Dark Bakura.
** GollumMadeMeDoIt: The Bakura/Dark Bakura relationship basically develops into this after Monster World.
* KillerGameMaster: To extreme levels with Dark Bakura in his first appearance as Monster World's GM, also acting as one in the final arc. He's usually a particularly evil one, purposefully screwing things up for the adventurers so he could kill them/trap their souls into their game pieces. Not to mention his scenarios always seem incredibly biased towards the players. Amusingly enough, he seems completely unwilling to actually create UnwinnableByDesign scenarios, to the point that [[spoiler:he informs Dark Yugi of a way to beat him (though he doesn't expect it to work) in the final arc because otherwise it "wouldn't be fair"]].
* KillerYoYo: Hirutani's gang
* KingOfGames: TropeNamer; it's the title the main protagonist has for his mastery of gaming.
* LetsFightLikeGentlemen: Played to a much creepier effect in the early volumes of the manga, where the games were often improvised based on the environment around them, and nearly always ended in death, insanity, or grievous bodily harm (compared to the later over-reliance on {{Tournament Arc}}s).
* LifeEnergy: Ba in Ancient Egyptian beliefs, which served as the life force used to summon and empower their Ka (Monster Spirits) in the Pharaoh's (Dark Yugi's) kingdom. In Dark Bakura's recreation of this kingdom (as a Tabletop roleplaying game, Memory World, the Shadow R.P.G.), Ba served as the characters' [[CastFromHitPoints Hit Points and Magic Points]] (and probably represented their level as well). When Priest Akhenaden turns into the High Priest of Darkness, he levels up and receives two more bars to his Ba Gauge.
* LighterAndSofter: The manga has a not-undeserved reputation for being DarkerAndEdgier than the anime, but there are a few instances where Takahashi went for something more low-key while the anime ramped things up for RuleOfDrama's sake:
** In the manga, Yugi's grandpa wasn't really ''kidnapped'' by Pegasus; his soul was instead sealed inside a video tape, and Yugi could talk with him through a camcorder whenever he liked. The anime makes it a straight case of YourSoulIsMine, and anime!Yugi is appropriately angstier about the whole affair.
** While the manga makes it clear that receiving the Millennium Eye was ''[[EyeScream not]]'' pleasant for Pegasus, the actual insertion was done off-panel. The anime, on the other hand, lets the audience see every second of Shadi painfully jamming it in the poor guy's eye socket.
* LukeIAmYourFather: [[spoiler: Towards the end of the Shadow RPG, High Priest of Darkness Akhenaden reveals to Priest Seto that he was his father all along and tries to make Priest Seto join him and become the King of Darkness]].
* MakeupIsEvil: Seen with Ms. Chono, who uses it so much it's like a mask.
* MeaningfulName: Not only does Yugi's name mean "Game" in Japanese, if you combine the first character of Yugi's name with the first character of Jounouchi's name, you get "Yujyo", which means "Friendship."
** The title, meaning "Game King," could also be taken as "King Yugi," referring to the main character who ''is'' the Game King. It also serves somewhat of a double-meaning later. ([[spoiler: Yugi's alterego, Dark Yugi, is the spirit of a gambler who was once the King of an Egyptian Dynasty named Pharaoh Atem.]])
** Sugoroku (Yugi's grandfather) is named after a Japanese board game similar to backgammon.
* MentalWorld: Shadi's Millennium Key allows him to enter a person's mind, which projects rooms that reflect a person's personality -- their ambitions, complexes, etc. He can also, um, [[MindRape arrange things]]. Yugi has ''two'' of these rooms (likewise for Bakura too, probably). His room reflects his innocence and love for gaming, while Dark Yugi's room is filled with mazes and traps, reflecting the complexity of his soul. And, as Shadi described, [[ChekhovsGun like a Pharaoh's Tomb]].
* [[MetaGame Metagaming]]: As it applies to role-playing games. [[spoiler: During the Shadow RPG of the final arc, while Dark Yugi's characters were subject to paralysis for several rounds (due to Dark Bakura's Time Stop ability), Zorc Necrophades was about to launch its [[TotalPartyKill Zorc Inferno]]. Priest Seto being one of the characters in question that was within the target range of Zorc's ultimate AOE damage spell, Dark Yugi tries to convince Dark Bakura as a role-player to have High Priest of Darkness stop Zorc from attacking, because he's Seto's father. In a horrifying break from his previously-characterized obsession with the concept of players "becoming their characters" in his {{Tabletop RPG}}s, he calls Dark Yugi a fool for thinking that would work and says that ''he'' is in control of Zorc, launching his attack anyway before being blocked by Hassan (an NPC controlled by Shadi).]]
* MindControlEyes: The Millennium Rod's brainwashing induces this.
* MindRape: PENALTY GAME! Every single one that does not involve dying.
* MindScrew: The Millennium World arc is a mild version. In general, things make sense and you can follow what's going on, but some really bizarre stuff happens too.
** Shadi, good lord.
* MikeNelsonDestroyerOfWorlds: Everything that's happened is because Yugi wanted a friend, poor kid.
* MoralDissonance: Dark Yugi chastises Pandora for sacrificing his monsters in order to win a game. Apparently all those tribute and ritual summons that Yugi's done don't count. Not to mention that his first Capsule Monster Chess game with Mokuba involved sacrificing all his monsters so that his trump card can instantly OneHitKill all of Mokuba's monsters.
** There is a subtle difference there. Dark Yuugi honors the sacrifices of his monsters and even in one scene mentally apologizes to one of his Capsule Monsters for sacrificing it. In the anime-only Doma Arc where he's ([[spoiler:possessed by the power of the Orachalchos]]) and forgets that, he ([[spoiler:loses the duel and Yuugi as well]]).
* MoralityChain[=/=]MoralityPet: Mokuba Kaiba. As the Season Zero/manga version of Kaiba shows [[AxCrazy exactly what happens to his personality without Mokuba holding him back.]] The manga is pretty explicit in stating that Mokuba is the last and final piece of his rebuilt heart.
* MsFanservice: Anzu, Ms. Chono, Mai, and Black Magician Girl. Anzu in particular had chapters where she wore a waitress outfit, outfits that accentuated her beautiful, long, shapely legs, and a skimpy, hot bikini while at a water park.
* MundaneMadeAwesome: Who knew yo-yos could be used that way?
** It should be noted that drawing cards and placing them down isn't as ridiculous as it is in the anime, judging by how calmly it's drawn in the manga. Dice rolling, however, is still taken to epic proportions in the manga.
** "UNMEI NO DICE ROLL!" The dice roll of ''LIFE OR DEATH!''
* MyLittlePanzer: Capsule Monsters Chess, Digital Pets, Monster World, Duel Monsters, etc. are such a safe games for little kids, aren't they?
** {{Subverted}}: By themselves, the games are perfectly safe; it's the gamers like the Ghouls that add in their own, more dangerous, rules or invoke the dark magic of the Millennium Items that make it so [[DepartmentOfRedundancyDepartment dangerous]].
* MysteriousProtector: Dark Yugi before the Death-T arc, where he takes over Yugi's body in order to solve Yugi's conflicts and his existence was relatively unknown to Yugi's friends.
* MythArc: Shadow Games, the Millennium Items, and the identity of Dark Yugi/uncovering the Pharaoh's memories all play important parts in all of the {{StoryArc}}s in this manga.
[[/folder]]

[[folder:N-Z]]
* {{Necromantic}}: [[spoiler:Pegasus got his StartOfDarkness after his beloved Cyndia passed away and he vowed to bring her back.]]
* NewRulesAsThePlotDemands:
** Duelist Kingdom is this writ large. Some make at least a bit of sense, like flying monsters having an advantage over land-based monsters, or machine monsters rusting due to a mist over the field. Others just plain have no basis in fact at all (at least as a regular card game), most prominently the infamous Catapult Turtle move Yugi uses to defeat the Player Killer of Darkness. However, Duelist Kingdom is stated to use custom rules specific to the tournament.
** Once the rules were written and pinned down in Battle City as the "Expert Rules", this turned into "New Cards As the Plot Demands," with duelists producing cards never before seen at just the right time. Many of these cards exist for RuleOfCool, as there are other pre-existing cards that do the same thing as the new card but don't fit the theme of the duelist's deck. And lapses of the random new rules still occurred: Jinzo is supposedly immune to Time Wizard's effect due to being made of special metal, for example, and Flute of Summoning Dragon lets both players summon Dragons from their hand if they want.
* NiceJobBreakingItHero: Yugi's first Penalty Game against Seto Kaiba, the Experience of Death, was meant to teach him how the cards felt in the hopes it would make him a better gamer. Not only did it reinforce Seto's losing equals death philosophy, it made him bitter and revenge-crazed, leading him to try and kill Yugi, his grandpa, and all of his friends.
* NobleDemon: Seto Kaiba.
* NonHumanUndead: In the first tournament, Yugi defeats Seo Kaiba's Blue-Eyes Ultimate Dragon by fusing his Mammoth Graveyard into it... which, because both are incompatible types, slowly weakens the resulting fusion and will cause it's eventual death. After this, the rule is never referenced again.
** Another example are Ghost Kozuka's monsters brought back from the grave.
* NonLethalWarfare: Subverted with the Shooting Stardust game during Death-T. Yugi and his friends think it's a harmless laser tag game at first -- and it certainly is for them with the toy guns they're given -- but the people Kaiba hired to play against them were professor killers, and the guns they used shot out electrical currents, which were amplified to lethal levels when they hit the sensors.
* NotADate: Anzu goes on one of these with Dark Yugi (who originally thought it was going to be a straight-up date with his partner, normal Yugi) after the Dragons, Dice & Dungeons arc. Even earlier than that, she goes on one of these with the regular Yugi at an amusement park.
* NotJustATournament: Virtually every TournamentArc.
* OffscreenMomentOfAwesome: [[spoiler:Yugi vs. Jonouchi immediately after Battle City, even if we know Jonouchi won (well, according to Kazuki Takahashi... In the anime canon, Jonouchi is shown to have regained possession of his Red-Eyes Black Dragon during the filler arcs meaning he won, but in the manga, he is only shown using it in the Shadow RPG, where the intruding non-player characters were allowed to recreate their decks as per their memories to replicate the Millennium Item Ka battles)]] Both mediums skip this.
* OhCrap: Characters are guaranteed to have this reaction whenever Yugi manages to turn the odds around in a game. Perfect example would be the escaped convict who held Anzu hostage, realizing that he was going to burn to death.
** Dark Bakura has an OhCrap moment when he realizes that the real Bakura regained control of his left hand during the Monster World RPG. Also, when the real Bakura's soul breaks his dice.
* OlderThanTheyLook: Yugi. One chapter has a amusment park employee give him a hard time because she thought he was an elementary schooler.
* TheOnlyOneAllowedToDefeatYou: Presented by Dark Bakura in the original manga (volume ten of Yu-Gi-Oh! Duelist), when he interrupts the match of DDM between Yugi and Ryuuji Otogi to prevent the former from losing the Millennium Puzzle.
** Seto Kaiba also treats Yugi as such.
* OnlyTheChosenMayWield: The Millennium Items are very unforgiving to those who plan on wielding them, but are not the ones that are "chosen." For example, Shadi forced a thief to wear the Millennium Ring to see if he was the one destined to wear it. [[spoiler:He clearly wasn't, as the ring punctured his chest and [[BodyHorror set the insides of his body on fire]]]]. Likewise, Shadi had [[spoiler:gauged Pegasus's eye out with a knife to test if he was worthy of wielding the Millennium Eye. Had Pegasus not been the chosen one, he would have most likely have been left for dead with an empty eye-socket]].
** The Millennium Puzzle itself is a little friendlier to its attempted wielders, at least before it was put together by [[ChosenOne Yugi]]. They would merely find the puzzle too challenging to complete, and even before that, get killed by the Shadow Games in the tomb it was hidden in rather than by the Puzzle itself. However, after Yugi had completed the Millennium Puzzle, those who attempted steal it/put it back together through force/cheating would incur the wrath of the Millennium Puzzle. An example would be [[spoiler:Otogi's father, who had attempted to put together the pieces of the broken Millennium Puzzle, only to find himself trapped in a [[MindRape maze of illusions]]]]-- though even that lasts for only a few seconds.
* OrgasmicallyDelicious: [[http://kokorononaka.net/FAQ/v23-143s.jpg Bakura's steak]].
* OrphanageOfFear: According to Kaiba, at least.
* ParentalAbandonment: Mai lost her parents at a young age.
* PhantomZonePicture: Pegasus gave Seto and Mokuba Penalty Games, which involved their souls getting trapped into blank cards.
* PintsizedPowerhouse: Yugi.
* PlayerKilling: Pegasus's "star chip assassins" that are hired to eliminate players in the Duelist Kingdom game are called Player Killers. Because of their dirty methods and being just as screwed in the head as Pegasus, two of them have the unfortunate honor of being the final victims of Dark Yugi's Shadow Games and receiving his final Penalty Games.
* PlotDevice: The various games and gambles used to further the plot and character development. Most notably Duel Monsters in the tournament arcs.
* PlotTumor: The Duel Monsters card game after volume eight. After Duelist Kingdom, Ryuji Otogi is introduced and the plot briefly goes back to its formula of switching games for several chapters, introducing Bar Bet games and Dragons, Dice, & Dungeons. After DDD is over and done with, the card game is the major plot device during Battle City. The Memory World, while an RPG, uses Duel Monsters and duel-related concepts alongside its own monsters and concepts, and the Ceremonial Battle is a game of Duel Monsters.
* PokemonSpeak: In Volumes 6-7, the Monster World characters Pau and Pokii speak using their own names.
* PoweredByAForsakenChild: [[spoiler:Creating the Millennium Items required a sacrifice of 99 human lives.]]
* PowerMakesYourHairGrow: When Yugi, Bakura and Marik become possessed by the spirits of the Millennium Items (or in Marik's case his SuperPoweredEvilSide), their hair gets even more ridiculous than usual.
* PowerOfFriendship: A common {{Aesop}} of the series.
* PowerTrio:
** BeautyBrainsAndBrawn: Shizuka, Anzu and Mai.
** BlondeBrunetteRedhead: Mai, Anzu and Shizuka.
* {{Pride}}: Dark Yugi, to a fault. Starting off as a fearless gamer that everyone should supposedly look up to, his pride starts to become crippling during the Duelist Kingdom arc, where his refusal to play defensively caused his grandfather be the subject of his Penalty Game by Pegasus, repeatedly gambles his life on his own accord during the tournament, and his refusal to lose almost kills Seto Kaiba until his other self stopped him. When the normal Yugi almost refuses to take Mai's star chips because it's not "what his other self would want", Jonouchi calls Dark Yugi out on this, which leads to his character development, where he's still confident and a tad cocky, but loses his "lose or die" attitude.
* PsychoticSmirk: Kazuki Takahashi is pretty good at drawing these. Dark Yugi has it perfected, ''and he isn't even a villain''.
* PsychicPowers: The Millennium Items give their owners a variety of psychic powers, depending on the item. Some examples being [[MindRape mind raping]], locating and identifying other Millennium Item holders, [[{{Telepathy}} mind reading]], [[JourneyToTheCenterOfTheMind visiting someone's mental landscape]], [[SpiderSense seeing the future]], and [[BodySnatcher possessing other people]].
* TheReasonYouSuckSpeech: Kaiba, to anyone unfortunate enough to lose to him. Jonouchi was a victim to this at one point.
** Anzu, of all people, turns out to be surprisingly good at these, although she doesn't give them often. She gives one to Kaiba at Duelist Kingdom, although it's more of a "the reason Yugi is better than you" speech.
* RebelRelaxation: Rather comically, mild-mannered {{nice guy}} Ryou is seen [[http://i.imgur.com/N1iirbf.png leaning insouciantly against a tree]] while everyone else watches Mokuba having a tantrum.
* {{Reincarnation}}: Many characters introduced during the course of the series are (or implied to be) reincarnations of the ancient Egyptian characters introduced in the Millennium World arc. [[spoiler:Common Epileptic Trees is that Ryou is something similar in regards to the ancient BigBad Thief King Bakura. Seto (with Set) and Ishizu (with Isis) are straighter examples.]]
* ReincarnationRomance: [[spoiler:Seto and Kisara.]]
* {{Retcon}}: Shadi mentions "bringing the Millennium Puzzle home to his family" once during his first appearance. It is never brought up again.
** In the first chapter, Sugoroku Mutou tells Yugi and Anzu that the Millennium Puzzle was found by a team of British archaeologists who died after uncovering the puzzle, with their last words being "The Shadow Games." In the first chapter of the Millennium World saga, it is revealed that this British team of archaeologists died WHILE trying to get the Millennium Puzzle (their last words still being "The Shadow Games") and Sugoroku was the one that ended up finding the Puzzle after conquering the tomb's Shadow Games.
* RevisitingTheRoots: After nothing but Duel Monsters post-Dungeon Dice Monsters, the manga switches games during the Millennium World arc, showcasing an elaborate tabletop RPG.
* RiddleMeThis: ''All'' of Shadi's Shadow Games involve riddles or puzzles (fitting, as his very existence is a riddle). The Labyrinth Coin game that Dark Yugi and Dark Bakura played against the Meikyuu Brothers during Duelist Kingdom was a way to destroy their UnwinnableByDesign riddle.
* RightBehindMe: When a game shop opened in front of the shop owned by Yugi's Grandfather, Yugi went there to buy the new game and Yugi asked his friends not to tell his grandfather. Yugi even complained about Grandfather being old-fashioned and it being the reason his shop had no business. Then he learned his Grandfather was behind him.
* RoaringRampageOfRevenge: [[spoiler: Thief King Bakura, against Pharaoh Atem and his priests]].
* RousseauWasRight: Numerous bad guys including Marik Ishtar and Pegasus all seem hopelessly callous and evil only to eventually prove to be good at heart, whether by exorcism of an evil side or simple persuasion, usually by Yugi or the Pharaoh. Seto Kaiba is also routinely obnoxious and cold yet occasionally proves to have a compassionate side, which is usually related to his love for his little brother Mokuba.
* RussianRoulette: Yugi, Jonouchi, and Mokuba play a variation of this... with poison food instead of a revolver.
** "Bandit" Keith Howard plays this during his depression after losing to Pegasus. His Penalty game also involved his hand turning into a gun and being forced to play Russian Roulette, killing him.
* SadistTeacher: Ms. Chono delights in expelling students on technicalities and tormenting them by revealing their secrets.
* SchoolUniformsAreTheNewBlack: Yugi. One chapter even lampshades this by having Jonouchi ask Yugi why he's wearing his school uniform during the weekend. [[http://38.media.tumblr.com/38cfb71fc5e002a52fa65319766ac884/tumblr_inline_n0cpf9TYCu1r9pg5v.png He's surprised to hear that that's supposed to be weird]].
* ScrewTheRulesIHaveMoney: Kaiba does it, of course.
** ScrewTheRulesIMakeThem: Pegasus, however, even makes special cards that never go into circulation just so that it gives him an advantage as the creator of the Duel Monsters card game.
* SealedEvilInASixPack: An in-universe fictional example is Exodia, a monster so powerful it takes multiple cards to contain him. The individual pieces are worthless, but a player who reassembles Exodia by getting all five parts in play wins immediately.
** And The Pharaoh was trapped in the Millennium Pendant, which was then broken up into pieces. They were all kept in one place, but putting it back together was a complicated process (which is why it was then renamed the Millennium Puzzle).
* SelfMadeOrphan: Already being orphans when their parents died, Seto and Mokuba become orphans again after the former drives their abusive stepfather to suicide. And [[spoiler:Marik's SplitPersonality killed his father when he tried to kill his adopted brother, Rishid]].
* ShoutOut: In the very first chapter, Yugi makes a reference to ''Manga/DragonBall'' when he talks about the Millennium Puzzle granting one wish.
** And one to ''Manga/BoboboboBobobo'' as well. Twice in the 3rd volume of the final arc someone is seen with a Nu hankercheif.
** Chapter 41 "Let's Find Love" has the same plot as one episode of Manga/YuYuHakusho (hero will be expelled if he doesn't find an item that a teacher hid somewhere in the school- and actually hid on his own person).
* ShownTheirWork: While he mixed up the "ka" and "ba" concepts, Kazuki Takahashi did and showed Egyptian research in the manga. The baby Pharaoh has a [[http://en.wikipedia.org/wiki/Sidelock_of_youth sidelock of Youth]].
* SlasherSmile: Dark Marik is so murderous that he has this face on 90% of the time. Dark Bakura pulls off a few pretty good ones, himself.
* SmugSmiler: Kaiba and Dark Yugi.
* SoulJar: A literal one in volume six, in the chapters about Imori and the Dragon Cards.
** Dark Bakura's Penalty Games involve the losers being trapped in lead R.P.G. figurines. Likewise, Pegasus's Penalty Games involve trapping souls/minds into inanimate objects, i.e. a miniature TV screen for Yugi's grandfather and cards for the Kaiba brothers.
** Dark Bakura's Millennium Ring allows him to create Soul Jars by transferring parts of his soul into any object. Yugi's puzzle piece is one example.
** For both Dark Yugi and Dark Bakura, the normal Yugi and Bakura are their living Soul Jars. If they allow their host's bodies to die, they'll die as well.
* SpellMyNameWithAnS: Yugi or Yuugi? Jonouchi or Jyonouchi? Isis or Ishizu? Marik or Malik? The Viz English manga goes for the former translations, except for Isis/Ishizu, where Viz went with "Ishizu" for her reincarnation" and "Isis" for her past life.
** In official English translations, Marik's surname is spelled "Ishtar," while in the Bunkoban manga Kazuki Takahashi spells the name in English as "Ishutarl."
* SplitPersonality: Dark Yugi and Dark Bakura are kind of like this to the regular ones, especially Dark Yugi during the earlier chapters since he shares Yugi's memories. Dark Marik is more of a traditional example. It is implied that the Millennium Items have the ability to induce this naturally by using the [[StartOfDarkness darkness in your heart]].
* SplitPersonalityMakeover: Yugi's face changes from cute to sinister when Dark Yugi takes over. Same thing with Bakura and Dark Bakura. Though normal Marik also looks sinister, but less sinister than Dark Marik. The makeovers include, among other things, their hair getting wackier (with Dark Marik's almost doubling in size) and a tendency towards [[SlasherSmile slasher smiles]]
* StepfordSmiler: Ryou Bakura tries to look happy all of the time, but that's hard when you have a malicious spirit possess you and try to kill your friends.
* SuperpoweredEvilSide: Dark Yugi, Dark Bakura, and Dark Marik.
* SwallowTheKey: One character does this as part of his hereditary Human Vault job.
** Earlier, Mokuba does this. The people that are after the key regularly check his feces. Imagine it, and HilarityEnsues.
* TabletopRPG: Appears twice in the manga, with the adventures being long enough to be their own arcs, Monster World and [[spoiler:Millennium World]].
* TalkingToThemself: Starting from the conclusion of the Duelist Kingdom arc, Yugi frequently has bro-talks with the other personality residing within the Puzzle, Dark Yugi, to the point where his mother starts to worry. Dark Yugi even gives some [[FreakyFashionMildMind hilarious fashion advice]] to Yugi at the beginning of the Dragons, Dice, & Dungeons saga.
** The same goes to Bakura, somewhat. He only ever directly communicates with Dark Bakura during the Monster World RPG and the middle of Duelist Kingdom when the spirit convinces Bakura to put the Ring back on. After that, direct communication between the two is no longer shown on-panel.
* ThinlyVeiledDubCountryChange: The Italian translation of the manga changes the currency used to a local currency, while still keeping it set in Japan. So people will refer to cents instead of yen, despite the coins and bills appearing clearly being yen coins and bills. [[InconsistentDub Only in two chapters far apart from eachother, one in Volume 3 and one in Volume 19]], while Yen are mentioned with no problem in every other chapter. Also, in both the chapters money was clearly shown. Indeed, [[SarcasmMode that silver coin with "500" on it is clearly the famous 4,60 € coin]].
* TinyGuyHugeGirl: Yugi/Dark Yugi and Anzu.
* TooDumbToLive: Seems like Bakura's only TheSmartGuy when it comes to games. That, or he really believes that [[spoiler:his other self has turned over a new leaf and is now benevolent like Yuugi's]]. When the gang was looking for Kaiba and Mokuba before [[spoiler:the Alcatraz Duel Tower blew up]], he came across [[spoiler:the Millennium Ring in Yuugi's room... and happily puts it back on, seemingly forgetting all the trouble it caused him and his friends]].
* TrainingFromHell: [[spoiler: Mahado is implied to have gone through this in the afterlife, coming back as a Monster Spirit, fusing with Magus of Illusions (becoming the precursor to Black Magician), stronger than ever before, in order to serve his king once more in the battle against Zorc.]]
** Kaiba's BackStory. In order to make him a suitable heir to Kaibacorp, his adoptive father Gozaburo put him through a brutally intense period of schooling from age 10 onward. Judging from what is shown in the manga, it involved leashing him to a desk and the occasional beating with a switch. This leads him on his descent to madness until receiving the [[RedemptionQuest Mind Crush]] Penalty Game from Dark Yugi.
* TrueCompanions: The reason why the main characters never give up, because no matter what, their companions have their back. The group's bond is so deep and powerful that Jonouchi, Honda, Anzu, and Bakura were able to block Pegasus's Mind Scan magic with it, helping Dark Yugi in defeating him.
* TwoPersonLoveTriangle: Yugi likes Anzu, who in turn, has a crush on his OlderAlterEgo that shares the same body as Yugi.
* UncannyValleyMakeup: Seen with Ms. Chono, who wears so much makeup it's like a mask.
* UncattyResemblance: Everyone's, but especially Yugi's, virtual pet in the manga.
** Also for their game pieces in Bakura's Monster World. Again, emphasis on Yugi's perfectly matching hair.
* UnsoundEffect: At least in Polish version there are effects like "SIT!" or "STARE!". This is probably because they didn't know how to translate Japanese onomatopoeias into Polish, so they just wrote actions those sounds described.
* TheVamp: Ms. Chono and Mai.
* WagerSlave: In the manga, this was basically the entire point.
* WeWillMeetAgain: After her Penalty Game, Ms. Chono swears revenge. [[AbortedArc She never gets it.]]
* WhiteHairBlackHeart: Bakura's evil alter ego (the normal Bakura is a complete aversion). Also Marik and his SplitPersonality.
* TheWorfEffect: Mai Kujaku. No, seriously. Top-notch duelist who gets seeded off against the most dangerous opponents, and ends up being MindRaped by Dark Marik. Despite being a very skilled duelist, she keeps going up against super-powerful opponents to show the viewers how hard it'll be for the other heroes to win.
* WorldOfHam: Games are ''serious business''.
--> ''"Games mean conflict - a combat between two enemies. It’s the same for all of them! Cards, chess, the blood-soaked wars of the human race… All these are different kinds of games. Do you know what god gave to people so they could play games in this world? A single chip called life!"''
---> --'''Seto Kaiba''', Chapter 106 (Duelist Kingdom), in response to Yugi's unwillingness to send him off to his death.
* YouAreNotAlone: From the very first chapter, this has been a staple of the series.
** Back when Jonouchi and Honda used to pick on Yugi, Anzu would stick up for him.
** When Kaiba had Yugi on the ropes with three Blue-Eyes White Dragons, Yugi was too scared to even move at first, until he envisioned his friends standing with him. To his luck, the confidence they gave him allowed Yugi to draw Exodia the Forbidden One and beat Kaiba.
*** This happens again during his duel with Pegasus. As they were playing a shadow game, host Yugi was slowly dying due to the game's sinsiter energies. Dark Yugi couldn't play alone due to Pegasus having the ability to read his mind, but when Yugi's friends focused their feelings on him, Dark Yugi regained his confidence and met Pegasus head-on.
** Happened twice during the ''Millenium World'' saga:
*** The Pharaoh was fighting the bandit king Bakura, whose powers were too much even for him. Just when it seemed like Bakura might be able to kill him, Yugi and his friends stepped up and offered their energy so he could summon the sun god Ra to vanquish Bakura.
*** Zorc Necrophades was able to kill of most of the Pharaoh's priests and soldiers and managed to seriously wear the Pharaoh down to his last sliver of life, but then Yugi and friends made a second reappearance and gave him the key to awakening Horakthy, destroying Zorc in one fell swoop.
* YouCantFightFate: Somewhat. Averted in Kaiba's duel with Ishizu.
* ZergRush: At one point during the Duelist Kingdom arc, Yugi uses Multiply, which causes Kuriboh to multiply each turn, in conjunction with Kuriboh's special ability allows it to nullify the damage done by one enemy monster. Due to there being no limit on how many monsters can be summoned with one magic card in the manga and anime's version of the game, this allows him to create a virtually impenetrable barrier of the little guys.
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