Cassette only. I have confirmed that it works up to the title screen! This is based on my subjective judgment, so please make your decision based on the photos. To prevent any issues, please refrain from purchasing if you are overly concerned about the condition. I have tried my best to take pictures to show the condition, but if there's anything unclear, please feel free to comment. Operation check: Completed (Normal) Retro game Pocket Monsters Green, a Game Boy game released in 1995. - Brand: Nintendo - Model Name: Pocket Monsters Green - Country of Manufacture: Japan - Release Year: 1995 - Model Number: DMG-APBJ-JPN Thank you for viewing.