and replace the byte with the hex version of the desired ID (e.g., 81 for "Legendary" becomes hex 51). Prerequisites for Editing Homebrew/CFW : Most editing methods require a Nintendo 3DS with Custom Firmware (CFW) to access and backup your (player) or (world) files. Save Backups
For those who want real-time editing without a PC, the "hottest" method is using to replace item drop tables.
This is the most famous on-console homebrew application dedicated specifically to editing files on the 3DS hardware.