Yu - Gi - Oh ! Duel Monsters 6 Expert 2 Yu - Gi - Oh ! Duel Monsters 6 Expert 2 is a video game for the Game Boy Advance , released in Japan on December 20 , 2001 . A modified version was later released under the title " " . " Yu - Gi - Oh ! Duel Monsters 6 Expert 2 " is set during the Battle City arc . The player duels characters from the anime and manga . The player can participate in a few tournaments and duel single opponents they come across on the map screen . Cards are awarded for various reasons including defeating opponents , winning tournaments and free cards with the Duelist Weekly magazine . Characters . This is a listing of characters in the video game " Yu - Gi - Oh ! Duel Monsters 6 Expert 2 " . Plot . The main focus of the game is participating in tournaments and collecting cards , but a small plot section occurs where the player battles with the Ghouls . After defeating the five Ghouls , who randomly appear , Téa controlled by Marik leads the player to the Ghoul ' s Pyramid . Here they must win five duels in a row , proceeding to a new chamber after winning each . The first is against Téa controlled by Marik , then Joey controlled , the next two are random Ghouls and the last is Marik . After clearing this section of the game , the Ghouls no longer randomly appear and may be faced like normal opponents and in events . Obtaining cards . At the start of the game , the payer is given a choice of three Decks . After that cards can be obtained through packs opened in the game or the password menu . In the password menu , the player can get cards by entering the eight digit Card Number found in the bottom corner of real cards . All Packs in the game contain five random cards , from a set . Unlike its counterpart ( ) the booster packs in the game are the same as OCG booster packs , although there some game exclusive packs like Ultimate Random Pack . After defeating an opponent you meet on the map screen you are awarded a Booster Pack . Special Packs are given for winning tournaments or defeating Ghouls . Every week the player is given five random cards with the magazine " Duelist Weekly " . Miscellaneous information . After dueling an opponent 99 times , the counter resets to 00 and then back to 01 . No record is kept on the total amount of duels with that opponent . In the Deck & Trunk main menu , there is a bar for achievements such as beating certain Cups , or getting a certain number of cards unlocked . There is no award for unlocking everything on this golden bar . Another gem on the bar is unlocked after defeating an opponent 80 times . There is a subroutine that allows Yami Yugi to cheat and start specifically with the following hand : Valkyrion the Magna Warrior , Alpha The Magnet Warrior , Beta The Magnet Warrior , Gamma The Magnet Warrior , and Premature Burial . This subroutine also puts Raigeki as the top card of his deck . Similarly , Mai Valentine can start with Elegant Egotist , Cyber Harpie Lady , Rising Air Current , a second Elegant Egotist , and Cyber Shield , with Premature Burial on top of her Deck , Mokuba Kaiba can start with Heavy Storm , Dark Hole , Cyber - Stein , and Megamorph , and his brother Seto Kaiba with the same hand plus Harpie ' s Feather Duster and Raigeki .