Once the "gift" appears on your home screen, you're ready to start ghost-busting!
A .cia file allows you to install the game directly to your 3DS home screen via (for users with Custom Firmware like Luma3DS). Luigi’s Mansion Dark Moon Legit CIA (EUR/USA)
Most versions available today are region-patched or available in both EUR (Multi-language) and USA formats to ensure compatibility with your console’s firmware. Quick Setup Guide Once the "gift" appears on your home screen,
Open FBI , navigate to SD -> cias , select the file, and choose "Install and delete CIA." navigate to SD -> cias