The product is Yu-Gi-Oh!: Duel Monsters for the Nintendo Game Boy, released in 1998 by Konami. This Japanese version of the game (NTSC-J) is an authentic US seller listing. It is part of the Yu-Gi-Oh! video game series and falls under the battle genre. With no manufacturer warranty or custom bundle included, this game offers an experience of strategic duels for fans of the popular card game franchise.