One of Yu-Gi-Oh's "side games" I thought was interesting is Dungeon Dice Monsters; fun in the manga/anime, has a solid Game Boy Advance title, & the IRL version has seen a renaissance
Yu-Gi-Oh! Duel Monsters International 2 Game Boy Advance GBA Games JAPAN | eBay
Yu-Gi-Oh! Dark Duel Stories | Yu-Gi-Oh! Wiki | Fandom
Yu-Gi-Oh! Duel Monsters 7: The Duel City Legend promotional cards | Yu-Gi-Oh! Wiki | Fandom
Yu-Gi-Oh! Duel Monsters Expert 2006 [Japan] - Nintendo Gameboy Advance (GBA) rom download | WoWroms.com
Yu-Gi-Oh Duel Monsters Expert 3 for Game Boy Advance
Yu-Gi-Oh Duel Monsters Expert 3 [Beginners Pack] for Game Boy Advance