So you want to give your Nintendo 3DS a fresh start? Whether you're selling it, passing it on to someone else, or just looking to clear out all the data and start over, resetting your 3DS to its factory settings is a simple process. Here's how to do it:

1. Power off your 3DS: Before you begin the reset process, make sure your 3DS is turned off completely.

2. Access System Settings: Turn on your 3DS and navigate to the System Settings from the Home Menu.

3. Format System Memory: Scroll through the System Settings and select 'Format System Memory.'

4. Confirm the reset: You will be prompted to confirm your decision to format the system memory. This action will erase all data on the 3DS, including game saves, downloaded software, and system settings.

5. Complete the reset: Once you confirm the reset, the 3DS will begin the process of formatting the system memory. This may take a few minutes to complete.

6. Set up your 3DS: After the reset is complete, you will need to set up your 3DS again, including creating a new Nintendo Network ID and linking it to your device.

7. Re-download any games and apps: If you had any digital games or apps on your 3DS, you will need to re-download them from the Nintendo eShop and re-install them onto your device.

By following these steps, you can reset your 3DS to its factory settings and start anew with a clean slate. Just be sure to back up any important data, such as game saves, before initiating the reset, as this process will erase all existing data on the device. Once the reset is complete, you can enjoy a fresh start with your 3DS and begin building up your game library and settings once again.