Yu-Gi-Oh! Duel Monsters Game Boy software Made by KONAMI, No box or instruction manual, with case. I haven't been able to confirm if it works because I don't have the hardware. - Brand: KONAMI - Game Title: Yu-Gi-Oh! Duel Monsters - Model Number: DMG-A-YU2-JPN - Included Items: Case I'm selling this because I found it while cleaning out my parents' house. Please refrain from purchasing if you are concerned about home storage. Thank you for looking.