Tested and working, no box. I found this while cleaning up my parents' house. I usually specialize in handmade items, and I'm not very familiar with games, so I asked Mercari AI for the description. I did confirm the software name, etc., but please ask any questions you have until you are satisfied. I will do my best to answer. I am also selling other games. If you purchase multiple items at the same time, I will offer a combined shipping discount, so please comment before purchasing. I will create a dedicated listing for you. Feel free to ask any questions. The following is the AI-generated text: 【Game Information】 "Downtown Nekketsu Monogatari: Doko Demo Dai Undokai," developed by Technos, is a Game Boy game released in 1992. It features unique characters and a variety of mini-games, where players compete in various events. 【Condition】 This product is used, but the exterior is in good condition and has been tested and confirmed to be working. It is also playable on the Game Boy Color. 【Collectors Item】 This software is a valuable item for fans and collectors of retro games. Technos' works, in particular, are known for their unique gameplay and characters. - Brand: Technos - Model Number: DMG-DUJI - Title: Downtown Nekketsu Monogatari: Doko Demo Dai Undokai - Country of Manufacture: Japan - Condition: Used - Release Year: 1992 Thank you for viewing.