Check whether your Chromebook can run Linux apps
Back up any important files from the Chromebook
Charge the Nintendo 3DS fully
Get a compatible microSD card for the 3DS
Format the microSD card as FAT32
Download the latest 3DS homebrew/modding files from trusted sources
Use the Chromebookâs Files app or Linux terminal to extract the downloaded archives
Copy the required files to the microSD card
Insert the microSD card into the 3DS
Follow a current 3DS modding guide step by step
Install the needed boot and homebrew files onto the 3DS
Verify the 3DS boots normally after each step
Keep a backup of the microSD card contents
Use only reputable guides and current files for your exact 3DS model and system version