Player ( WC08 ) This article describes the playable character in the video game , " Yu - Gi - Oh ! World Championship 2008 " . The player choses the name and gender of the character , controls their actions and contents of their Deck . Appearance . The player can wear any of the following clothing and customize its color : The player starts off with the Academy Disk , but can unlock and use the following Duel Disk s too . Biography . Grace . The player start off as a traveler to Duel World , the player start in the first world Grace . There are some Duel Spirits against whom the player can duel in this world . Once the player have beat everyone at least once , the player will see a Curse of Vampire bullying Gigobyte . Talk to Gigobyte , and Curse of Vampire will intervene . If the player wager a rare card , he will agree to duel the player . Defeat him , and the player unlock Curse of Vampire in World Championship Mode , and Gigobyte will show the player to the gate . Green Guardian - Embust will present the player with 5 different decks to duel against . Beat three , and he will open the gate , allowing the player to enter the next world - World of Sunlight . Defeat all five decks to unlock Syrus Truesdale in World Championship Mode . Sunlight . In this world , the player will see a Pyramid with Guardian Sphinx beside it . The player must talk to him and the player will be presented with five Duel Puzzles . Complete three to enter the pyramid , complete five to unlock Maximillion Pegasus in World Championship Mode . Inside the pyramid there are even more duelists . The player beating each duelist ( not counting Dark Mimic LV1 ) at least once and Spirit of the Pharaoh will appear . Defeat him , and the player unlock Spirit of the Pharaoh in World Championship Mode . Head outside , and the player will find Sand Moth kicking sand on Pyramid Turtle . The player has option to help , and the player will duel Sand Moth . After defeating it , the player unlock Sand Moth in World Championship Mode , and the turtle shows the player to an underwater area . Here , there are even more duelists . Beat them all at least once and a fourth duelist will appear , Otohime . Defeat Otohime , and the player unlock her in World Championship Mode , and a new gate will appear . When the player went to the gate , Shell Guardian - Savan will provides the player with five challenges . They are all normal duels , but with restrictions to deck building : The player complete three challenges to unlock the World of Civilization , and complete all five to unlock Alexis Rhodes in World Championship Mode . Civilization . In this world , the player will see a volcano and a factory area . Once again , the player will face some duelists and The Unhappy Maiden is in need of help . The player give her 4000 Life Points of LP recovery cards and she will give the player The Unhappy Girl , The Unhappy Maiden , and the player unlock her in World Championship Mode . After beating each duelist ( not including Molten Behemoth ) once , the player head back to the World of Grace and the player talk to Ojama Black . Then , the player go to the pyramid in the World of Sunlight and the player talk to Ojama Green - he ' ll duel the player . Win or lose , the player head back to the World of Civilization to find Ojama Yellow being attacked by Blowback Dragon . Duel it and win . For the effort , the player unlock Ojama Yellow and Blowback Dragon in World Championship Mode . Kozaky will also invite the player to his lab . He will ask the player if the player want to be a part of his duel research . There , the player must duel and beat Inpachi , Blazing Inpachi , and Woodborg Inpachi once each . This unlocks Woodborg Inpachi in World Championship Mode . Kozaky then asks the player for a favour - to enter the cave in the volcano and find its treasure . Inside await three more duel spirits . After defeating each duelist ( not counting Kotetsu ) once , the player receive the treasure - Limiter Removal . After the player receive the volcano treasure , the player take it to Kozaky , and he ' ll work on his new creation , Giga Gagagigo , though it goes out of control . The player duel it , and the player will unlock Kozaky in World Championship Mode and find the gate to the next world . At the gate , the player will be challenged by Speed Guardian - Ferrario . The player have to beat him three times in a row without resting in between , and the player can only carry a maximum of 10000 LP over to the next duels . Defeat him , and the player travel to the World of Darkness , along with unlocking several items at one go - that includes the Axel Brodie Disk and Axel Brodie in World Championship Mode . Darkness . This world introduces the player to Tag Duels . Neo - Spacian Dark Panther will explain the mechanics of a tag duel to the player and also puts the player in a practice duel to demonstrate . After this , he ' ll become the player ' s tag partner ( this can be changed if the player beaten any duel spirit at least ten times . Any duel ghost the player have downloaded will also work ) . Now , this place has several teams waiting for the player . There ' s Renge , Gatekeeper of Dark World waiting at a corner . The player talk to him , and each time the player do so the player well find itself in a Tag Duel with some of the Dark World denizens , and the player well also have to ante a card with " Dark World " in its name . Also , since the player are wagering a card , the player well also get a Dark World card each time the player defeat a team . Now , once the player were done beating these three teams , the player will duel every team available once more ( appears that they have been brainwashed ) , and then a castle will appear . The player visit it , and the player will be greeted by Gogiga Gagagigo and Mobius the Frost Monarch . After the player beat them , and the player will afterwards be challenged by Vampire Lord and Vampire Lady . Defeat both teams and they unlock themselves in World Championship Mode . Alien Infiltrator arrives , grumbles about the player undoing of the brainwashing , and disappears into the sky . The map has expanded - the player head up into the skies and take on more teams . After beating each team once , Alien Infiltrator and Alien Shocktrooper will challenge the player to a brainwashing duel - this one is computer - controlled . It may take the player a few tries to beat them . After the player beat them , they unlock themselves , and reveal the gate to the next world . When the player went to the next gate , the player are to face the guardians , Dark World Guardian - Gigori and Underworld Guardian - Moley , and their five deck combinations . The player beat three to proceed , and beat five to unlock Aster Phoenix in World Championship Mode . Order . The World of Order is filled with various challenges that require the player to meet certain conditions to pass . The player must be prepared to stock up on DP to get the right cards and meet these requirements . As usual , some duel spirits await the player at first . Layard the Liberator guards the gate . The player will have to beat it using a deck consisting of Fairy - Type monsters . By doing this it ' ll expand the map , and Gellenduo will come by talking about a card they lost . The player will be ask to help find the card . Anyway , the player will find a couple more duelists in the area . The player talks to both Nyan Nyan and Absorbing Kid . They will mention a strangely coloured cloud . A new duelist , Cloudian - Poison Cloud will appear over the hole in the clouds . By beating it the player will be able to travel beneath the clouds to find more duelists . When the player first duels these duelists , the player will be faced with certain conditions . After beating every duelist here at least once , the player challenges Senju again he ' ll say he picked something up , but will only give it to the player if the player beats him in 5 turns . The player ' s reward is the Nova Summoner card that Gellenduo has dropped . The player goes back out , and Radiant Jeral is waiting at the next gate - the player will have to deck it out to win . After the player is done , the gate will be opened . Up ahead is Airknight Parshath and a couple more of duel spirits . The player talks to Parshath and Parshath is worry about Gellenduo , as they were supposed to give him the Nova Summoner card . When the player gives him the card , he claims that the player stole it . It will eventually lead to the " Nova Summoner Robbery Case " , Voltanis the Adjudicator will accuse the player of being guilty . To prove innocence , the player will end up in a duel against Voltanis . Win or lose , the player will still be declared guilty until Gellenduo comes in and helps the player out . The player will be proven innocent and released . If the player won the duel , the player will unlock both Voltanis and Parshath in World Championship Mode . Up ahead at the next gate is Harvest Angel of Wisdom , requesting that the player finishes him off by doing at least 8000 Life Points ' worth of damage in a single turn . If the player does so , the next part of the map will be available . Meltiel , Sage of the Sky will approach the player and congratulate the player for making it this far , and states that there is a gate on top of this palace . However , to reach it the player will have to face several duelists along the way , each with their own condition to meet . Once the player has beaten all five challenges , the gate awaits the player . Sky Guardian - Sefolile will challenge the player to a 5 - round survival duel . Just like Ferrario ' s , but longer . After the player finish this , the credits roll , and the player unlock several things at once , including Dark Zane in World Championship Mode , and the last world - the World of Chaos . Chaos . The player will see two parts of the world , above and beneath . Several duel spirits await the player , as usual . Stone monument . There are a total of nine stone monuments in Duel World , the player can only encounter a stone monument if the player has beaten all the duelists five times each . Each stone monument has a carving of a duel spirits and the player need to summon it , in order to unseal it . The player sometime have to use the effect of the duel spirits , to unseal it . If the player unseal it , it will unlock more duelists in World Championship Mode . Clearing the six stone monuments , it will unlock Joey Wheeler and clearing them all unlock Yami Yugi . Deck . The player begins with a Deck , titled " Starter Deck " . Its contents can be changed and the player may create several more Decks as more cards are unlocked .