{{VGInfoboxrename|Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelists|https://www.konami.com/games/eu/en/topics/17742/}}{{Infobox video game| image = {{ #vardefine: $rand | {{ #choose: Yugi | Kaiba | Joey }} }}<!-- --><div class="switcher-container" style= "margin: 0 auto; max-width: 240px; text-align: left;"><!-- --><div><!-- -->[[File:YuDM4-GiBox-Oh! Duel Monsters IVJP- Yugi DeckYugiDeck.jpg|300px255px|Yugi Deck]]<!-- --><span class="switcher-label" {{ #ifeq: {{ #var: $rand }} | Yugi | data-switcher-default="true" }}">Show ''Yugi Deck'' box</span><!-- --></div><!-- --><div><!-- -->[[File:YuDM4-GiBox-Oh! Duel Monsters IVJP- Kaiba DeckKaibaDeck.jpg|300px255px|Kaiba Deck]]<!-- --><span class="switcher-label" {{ #ifeq: {{ #var: $rand }} | Kaiba | data-switcher-default="true" }}">Show ''Kaiba Deck'' box</span><!-- --></div><!-- --><div><!-- -->[[File:YuDM4-GiBox-Oh! Duel Monsters IVJP- JonouchiJonouchiDeck.jpg|300px255px|Joey Deck]]<!-- --><span class="switcher-label" {{ #ifeq: {{ #var: $rand }} | english name Joey | data-switcher-default= Yu"true" }}">Show ''Joey Deck'' box</span><!-- -Gi-Oh></div><! Duel Monsters 4: Battle of Great Duelist----></div>| kanji name ja_name = 遊戯王デュエルモンスターズ４　{{Ruby|遊|ユウ}}☆{{Ruby|戯|ギ}}☆{{Ruby|王|オウ}}デュエルモンスターズ{{Ruby|４|フォー}}　{{Ruby|最強決闘者戦記|バトル　オブ　グレイト　デュエリスト}}| romaji name romaji_name = Yūgiō Dyueru Monsutāzu 4 Fō: Batoru obu Obu Gureito Dyuerisuto| platform = Game Boy Color| languages = Japanese| developer = [[Konami]]| publisher = Konami| platform ja_release_date = Game Boy ColorDecember 7, 2000| rating series = Yu-Gi-Oh! Duel Monsters (video game series)| genre prev = Card BattleYu-Gi-Oh! Dark Duel Stories| release date next = {{flagYu-Gi-Oh! Duel Monsters 5: Expert 1|Japan}} December 7, 2000guide_book_1 = Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist Game Guide 1| galleries guide_book_2 = [[Gallery of Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist cards|Card gallery]]Game Guide 2

'''''Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist''''' (遊戯王デュエルモンスターズ４　{{Ruby|遊|ユウ}}☆{{Ruby|戯|ギ}}☆{{Ruby|王|オウ}}デュエルモンスターズ{{Ruby|４|フォー}}　{{Ruby|最強決闘者戦記|バトル　オブ　グレイト　デュエリスト}} ''Yūgiō Dyueru Monsutāzu 4 Fō: Batoru obu Obu Gureito Dyuerisuto'') is a Japan-only ''Yu-Gi-Oh!'' video game for the Game Boy Color, and the fourth installment in the [[Yu-Gi-Oh! Duel Monsters (video game series)|''Duel Monsters'' series]], preceded by ''[[Yu-Gi-Oh! Dark Duel Stories]]''. It was released December 7, 2000 as three separate versions ('''''Yugi Deck''''', '''''Kaiba Deck''''', and '''''Joey Deck'''''), each being able to use only a certain selection of the 900 available cards.

* [[Slifer the Sky Dragon (DM4)|Slifer the Sky Dragon]] can be used in the ''Yugi Deck'' version, obtained in the ''Kaiba Deck'' or ''Joey Deck'' version by defeating [[Yami Yugi (Duel Monsters 4)|Yami Yugi]].* [[Obelisk the Tormentor (DM4)|Obelisk the Tormentor]] can be used in the ''Kaiba Deck'' version, obtained in the ''Yugi Deck'' or ''Joey Deck'' version by defeating [[Yami Bakura (Duel Monsters 4)|Yami Bakura]].* [[The Winged Dragon of Ra (DM4)|The Winged Dragon of Ra]] can be used in the ''Joey Deck'' version, obtained in the ''Yugi Deck'' or ''Kaiba Deck'' version by defeating [[Marik Ishtar (Duel Monsters 4)|Marik Ishtar]].

* OpponentsCPU opponents' Decks and cards dropped are changed.* CPU opponents are now able to activate monster effects.

{{See also|List of ''Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist'' cards|Gallery of ''Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist'' cards}}

* 7 cards, which appeared in ''Duel Monsters III'' as constructed cards and , appear in this game as regular cards

[[File:{{Multiple image| image1 = DM4-Yugi main menu.png| image2 = DM4-Kaiba Main menu.png| image3 = DM4-Joey main menu.png|thumbwidth = 160|footer = Main menu. Left to right|: ''Yugi Deck'', ''Kaiba Deck'', ''Joey Deck''. The main menu options are (Kaiba versionclockwise from top)]]: "Campaign", "Versus", "Password", "Records", "Trade".}}

* '''[[#Campaign|Campaign]]''' (キャンペーン ''kyanpēn''): the game's story mode. Face AI opponents.* '''[[#Versus|Versus]]''' (たいせん ''taisen''): battle other players, using the Game Link Cable* '''[[#Password|Password]]''' (パスワード ''pasuwādo''): unlock items by entering a password* '''[[#Records|Records]]''' (せいせき ''seiseki''): statistics and other information about the player* '''[[#Trade|Trade]]''' (トレード ''torēdo''): trade with other players via the [[wikipedia:Game Link Cable|Game Link Cable]]. There are two [[#Debugging screens|debugging options]], hidden from normal gameplay.* '''Play sound'''* '''View scene'''

Each opponent in a stage must be defeated 5 times to unlock the next stage. After this, opponents can continue to be battled for more points and card drops. After defeating [[Maximillion Pegasus (Duel Monsters 4)|Maximillion Pegasus]] five times, the ending credits roll. After that an additional Dark Stage appears, with [[Mai Valentine (Duel Monsters 4)|Mai Valentine]] as an opponent. The opponent for this stage can be changed with a [[#Password|password]].

The first stage is [[Domino Park (square)|Domino Park]]. The second stage is the [[bridge underpass]]. The third stage, is the boss, [[Maximillion Pegasus (Duel Monsters 4)|Maximillion Pegasus]]. After defeating Pegasus five times, the player is given the password for the ending credits and an additional Dark Stage appears, with [[Mai Valentine (Duel Monsters 4)|Mai Valentine]] as an opponent. The opponent for this stage can be changed with a [[#Password|password]]. The secret stage can be unlocked by entering the [[#Password|password]] for one of its two characters. It is found by navigating left from the first stage. Like the Dark Stage, only one opponent will be available at a time and the opponent can be changed with a password. {| class="wikitable" style="clear: right;"

* [[Mako Tsunami (Duel Monsters 4)|Mako Tsunami]]<gallery widths="160" heights="144" mode="nolines">* [[Espa Roba (Duel Monsters 4)Pegasus-DM4.png |Espa Roba]]* [[Rex Raptor Maximillion Pegasus (Duel Monsters 4)|Rex RaptorMaximillion Pegasus]]* [[Weevil Underwood (Duel Monsters 4)|Weevil Underwood]]</gallery>* [[Simon Muran (Duel Monsters 4)|Simon Muran]]| [[File- style="vertical-align:DM4 ST1.png|160px|Stage 1]]top;"! scope="row" |-! colspan<gallery widths="160" heights="144" mode="2nolines" >DM4 ST4.png | Dark Stage 2|-</gallery>

* <gallery widths="160" heights="144" mode="nolines">Mai-DM4.png | [[Seeker Mai Valentine (Duel Monsters 4)|SeekerMai Valentine]]* Keith-DM4.png | [[Pandora Bandit Keith (Duel Monsters 4)|PandoraBandit Keith]]* Yami Yugi-DM4.png | [[Strings Yami Yugi (Duel Monsters 4)|StringsYami Yugi]]* Yami Bakura-DM4.png | [[Isis Ishtar Yami Bakura (Duel Monsters 4)|Isis IshtarYami Bakura]]| [[File:Marik-DM4 ST2.png |160px[[Marik Ishtar (Duel Monsters 4)|Stage 2Marik Ishtar]]</gallery>|-style="vertical-align: top;"! colspanscope="2row" | Final Boss<gallery widths="160" heights="144" mode="nolines">DM4 Secret Stage - Yugi Gonbutori.png |-Secret Stage<br />(Yugi Gonbutori)</gallery>

* <gallery widths="160" heights="144" mode="nolines">Yugi Gonbutori-DM4.png | [[Maximillion Pegasus Yugi Gonbutori (Duel Monsters 4)|Maximillion PegasusYugi Gonbutori]]</gallery>| [[File- style="vertical-align:DM4 ST3.png|160px|Stage 3]]top;"! scope="row" |-! colspan<gallery widths="160" heights="144" mode="2nolines" >DM4 Secret Stage - Kaiser Umiuma.png | Dark Secret Stage<br />(Kaiser Umiuma)|-</gallery>

* [[Mai Valentine (Duel Monsters 4)|Mai Valentine]]<gallery widths="160" heights="144" mode="nolines">* [[Bandit Keith (Duel Monsters 4)|Bandit Keith]]* [[Yami Yugi (Duel Monsters 4)|Yami Yugi]]* [[Yami Bakura (Duel Monsters 4)Kaiser Umiuma-DM4.png |Yami Bakura]]* [[Marik Ishtar Kaiser Umiuma (Duel Monsters 4)|Marik IshtarKaiser Umiuma]]| [[File:DM4 ST4.png|160px|Stage 4]]</gallery>

[[File:DM4-Joey Versus menu.png|thumb|right|The versus menu (''Joey versionDeck'')]]

| Change the Dark Stage opponent to [[Yami Bakura (Duel Monsters 4)|Yami Bakura]], except in ''Kaiba Deck''

| Change the Dark Stage opponent to [[Marik Ishtar (Duel Monsters 4)|Marik Ishtar]], except in ''Joey Deck''

| Change the Dark Stage opponent to [[Yami Yugi (Duel Monsters 4)|Yami Yugi]], except in ''Yugi Deck''

| Battle Change the Secret Stage opponent to [[Yugi Gonbutori (Duel Monsters 4)|Yugi Gonbutori]]

| Battle Change the Secret Stage opponent to [[Kaiser Umiuma (Duel Monsters 4)|Kaiser Umiuma]]

Each opponent has a different list of cards the player can get for beating them, with each card on the list having an assigned probability of randomly obtaining it. See [[Mako Tsunami (Duel Monsters 4)#Drops|Mako Tsunami (''Duel Monsters 4'') § Drops]] for example.

===Fusion Summon===Since "Fusions are attempted during Duels by play a card from the [[Polymerizationhand]]" is not included in this game, Fusions occur differently; selecting one card and placing it on top of another compatible card could result in a fusion for an entirely different [[Monster Card|monster]]. These Fusions are Alignment-based and are reflected as such in on the combination they create. For instance, fusing "[[Thunder Kid]]" with "[[Yamatano Dragon Scroll]]" would result in "[[Thunder Dragonfield]]"or hand. SimilarlyIf successful, combining it with any number of [[Aqua]] monsters would normally result in "[[Bolt Escargot]]". Also, combining "[[Time Wizard]]" with "[[Baby Dragon]]" would result in "[[Thousand Dragon]]"the two cards will merge into one.

* A Deck can have up to 3 copies of the same card or 1 copy in the case of [[#Forbidden & Limited cards|Limited cards]].* [[#Forbidden & Limited cards|Forbidden cards]] cannot be included in a Deck.

====Duelist Level====The player's Duelist Level is equal to <codeclass="nowrap">(Deck Volume &minus; 1600) ÷ 3 + 72</code>, rounded down and capped at 255. New games start with a Duelist Level of 72; the cap of 255 is reached with a Deck Volume of 2149. If Deck Volume could be decreased, the Duelist Level would hit 0 when the Deck Volume was decreased to 1384. {| class="wikitable"|-! scope="col" | Duelist Level! scope="col" | Deck Volume! scope="col" | Notes|-| -461 || 0 || Lowest possible Duelist Level, if Deck Volume could be decreased|-| -428 || 100 |||-| -394 || 200 |||-| -361 || 300 |||-| -328 || 400 |||-| -294 || 500 |||-| -128 || 1000 |||-| 0 || 1384 || Duelist Level = 0, if Deck Volume could be decreased|-| 72 || 1600 || Starting Duelist Level and Deck Volume|-| 205 || 2000 |||-| 255 || 2149 || Duelist Level cap|-| 538 || 3000 |||-| 872 || 4000 |||-| 1205 || 5000 |||-| 2871 || 9999 || Duelist Level at Deck Volume cap, if Duelist Level was not capped|-|} ====Monster Level====Although each card has its [[Level]] printed on it, the Level can be determined based on [[ATK]] and [[DEF]], both of which must be lower than the card's <code>Level × 350</code>. For example, a Level 7 monster's ATK and DEF must both be lower than 7 × 350 = 2450. A Level 8 must be lower than 8 × 350 = <2800. "[[D.Magician (DM4)|D.Magician]]" has 2500 ATK and 2100 DEF. Since one of its stats is too high to be Level 7, it is Level 8. These rules no longer apply at Level 11, as it is the highest standard Level in the game. e.g. "[[B.eye Ultra Dragon (DM4)|B.eye Ultra Dragon]]" and "[[Valkyrion the Magna Warrior (DM4)|Valkyrion the Magna Warrior]]" are Level 11 and have stats equal to or higher than 3850 (<code>11 × 350</code>).

Each card has its [[12 is a special Level]] printed on it. Although, used only by the number of Tributes required can also be determined from a card's [[ATK]] and [[DEFEgyptian God]]cards.

! scope="col" | ATK/DEFMaximum stat|-| 1 || 349|-| 2 || 699|-| 3 || 1049|-| 4 || 1399|-| 5 || 1749|-| 6 || 2099|-| 7 || 2449|-| 8 || 2799

| 09 | 1 to 4| Less than 1400 ATK and DEF3149

| 110 | 5 to 6| An ATK or DEF of at least 1400 and both ATK and DEF less than or equal to 20003499

| 211 | 7 to 8| An ATK or DEF greater than 2000 and both ATK and DEF less than 2800n/a

| 312 | 9 to 12| Either an ATK or DEF of at least 2800n/a

** [[Black Magic Dark (Alignment)|Shadow]] beats Light** [[White Magic Light (Alignment)|Light]] beats Fiend** [[Demon Magic Fiend (Alignment)|Fiend]] beats Dreams** [[Illusion Magic (Alignment)|Dreams]] beats Shadow

===Forbidden & Limited cards===

The game has three versions; ''Yugi Deck'', ''Kaiba Deck'' and ''Joey Deck''. The differences between each game, include:* There are certain Many cards where can only be used in individual certain versions. , e.g. "[[B.eye White Dragon (DM4)|B.eye White Dragon]]" can only be used in the ''Kaiba Deck'' . Some cards are only usable in a given version after that version's campaign has been beaten.* A different [[Egyptian God]] can be obtained in each gameversion. However , the God is not usable in the game, in which same version it is obtained and in; it must be traded onto to a different version to be used.* The title screen and main menu are a different color in each game. The title screens are colored according to the Egyptian God featured in the game; ''Yugi Deck'' has a red title screen, ''Kaiba Deck'' a blue screen, and ''Joey Deck'' a yellow screen. The main menu is colored complementarily: ''Yugi Deck'' has a blue screen, ''Kaiba Deck'' has a purple screen, and ''Joey Deck'' has a green screen.

Three cards were available as pre-order bonuses, with each game having a distinct pre-order bonus. Each copy of the game comes came with four promotional cards; one fixed card and three random promotional cards from a pool of five. The fixed card and random pools differ with each version Each of the three versions had a separate pool of five cards. Each of the gametwo guide books came with a promotional card.

! scope="rowrowgroup" rowspan="2" | VersionPre-order! scope="colgroup" colspan="2" | ''[[Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist: Yugi Deck pre-order promotional cardscard|Yugi Deck]]''! scope="colgroup" colspan="2" | ''[[Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist: Kaiba Deck pre-order promotional cardscard|Kaiba Deck]]''! scope="colgroup" colspan="2" | ''[[Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist: Jonouchi Deck pre-order promotional cardscard|Joey Deck]]''

! scope="colrowgroup" rowspan="56" | Random Bundled! scope="colgroup" colspan="2" | ''[[Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist: Yugi Deck promotional cards|Yugi Deck]]''! scope="colgroup" colspan="2" | ''[[Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist: Kaiba Deck promotional cards|Kaiba Deck]]''! scope="colgroup" colspan="2" | ''[[Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist: Jonouchi Deck promotional cards|Joey Deck]]''|-| G4-04 || "[[Windstorm of Etaqua]]" || G4-05 || "[[Aqua Chorus]]" || G4-06 || "[[Sebek's Blessing]]"|-| G4-07 || "[[Anti-Spell Fragrance]]"| G4-08 || "[[Riryoku]]"| G4-09 || "[[Sword of Dragon's Soul]]"|-| G4-10 || "[[Mesmeric Control]]"| G4-11 || "[[Seal of the Ancients]]"| G4-12 || "[[Negate Attack]]"|-| G4-13 || "[[Gamma The Magnet Warrior]]"| G4-14 || "[[Valkyrion the Magna Warrior]]"| G4-15 || "[[Magical Arm Shield]]"

| G4-07 18 || "[[Anti-Spell FragranceRing of Destruction]]" || G4-08 17 || "[[RiryokuVorse Raider]]" || G4-09 16 || "[[Alligator's Sword of Dragon's Soul]]"

| G4-10 || "[[Mesmeric Control]]" || G4-11 |} {| class="[[Seal of the Ancients]]wikitable" || G4-12 || "[[Negate Attack]]"+ Guide promotional cards

! scope="rowgroup" rowspan="2" | G4-13 Guide! scope="colgroup" colspan="2" || "''[[Gamma The Magnet WarriorYu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist Game Guide 1 promotional card|Volume 1]]''! scope="colgroup" colspan="2" || G4-14 || "''[[Valkyrion the Magna Warrior]]" || G4Yu-Gi-15 |Oh! Duel Monsters 4: Battle of Great Duelist Game Guide 2 promotional card| "[[Magical Arm ShieldVolume 2]]"''

| G4GB-18 B1 || "[[Ring of DestructionBerfomet]]" || G4-17 || "[[Vorse Raider]]" || G4GB-16 B2 || "[[Alligator's Sword DragonChimera the Flying Mythical Beast]]"

{{See also|== Reception ==''Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist Game Guide 1'' promotional cardsold 2.5 million copies,<ref>{{cite web |''Yuurl=http://www.the-Gimagicbox.com/Chart-Oh! Duel Monsters 4JPPlatinum.shtml |title=Japan Platinum Game Chart |publisher=The Magic Box |accessdate=April 25, 2017 }}</ref> making it the [[wikipedia: Battle List of Great Duelist best-selling Game Boy video games|20th-best-selling Game Boy/Game Guide 2'' promotional card}}Boy Color title]] of all time. == References ==<references />

* [http://www.konami.jp/gs/game/yugioh_dm4/index.html Official Japanese website]([https://web.archive.org/web/20061126213420/http://www.konami.jp/gs/game/yugioh_dm4/index.html Web archive])

* [httphttps://www.romhacking.net/games/439/ Romhacking.net ''Kaiba Deck'' page]** [https://datacrystal.romhackingtcrf.net/wiki/Yu-Gi-Oh!_Duel_Monsters_4:_Kaiba_Deck Data Crystal ''Kaiba Deck'' page]* Retro Achievements pages:** ''[https://retroachievements.org/game/14108 Yugi Deck]''** ''[https://retroachievements.org/game/13801 Kaiba Deck]''** ''[https://retroachievements.org/game/14109 Joey Deck]''