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There are 16 games and there's way too many to list, but it's from the Gameboy games to Gameboy Advance and some DS versions. There's a list of them online if you search on the web.
Sorry, there was a problem. Please try again later.From Konami Site, https://www.konami.com/yugioh/earlydayscollection/us/en/: Yu-Gi-Oh! Duel Monsters 1998/GAME BOY Yu-Gi-Oh! Duel Monsters II: Dark Duel Stories 1999/GAME BOY, GAME BOY COLOR Yu-Gi-Oh! Duel Monsters II: Dark Duel Stories 1999/GAME BOY, GAME BOY COLOR Yu-Gi-Oh! Dark Duel Stories 2000/GAME BOY COLOR Yu-Gi-Oh! Duel Monsters 4: Battle of Great Duelist 2000/GAME BOY COLOR Yu-Gi-Oh! Dungeon Dice Monsters 2001/GAME BOY ADVANCE Yu-Gi-Oh! The Eternal Duelist Soul 2001/GAME BOY ADVANCE Yu-Gi-Oh! Duel Monsters 6 Expert 2 2001/GAME BOY ADVANCE Yu-Gi-Oh! The Sacred Cards 2002/GAME BOY ADVANCE Yu-Gi-Oh! Reshef of Destruction 2003/GAME BOY ADVANCE u-Gi-Oh! Worldwide Edition: Stairway to the Destined Duel 2003/GAME BOY ADVANCE Yu-Gi-Oh! World Championship Tournament 2004 2004/GAME BOY ADVANCE Yu-Gi-Oh! Destiny Board Traveler 2004/GAME BOY ADVANCE Yu-Gi-Oh! 7 Trials to Glory: World Championship Tournament 2005 2004/GAME BOY ADVANCE
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