Nand.bin Melonds [better]
If you own a physical Nintendo DSi or DSi XL, you can dump its NAND to a nand.bin file using custom firmware. This is the safest, most legitimate method.
You primarily need nand.bin if you want to use in melonDS. Without it, the emulator defaults to regular DS mode, which lacks: nand.bin melonds
If you want practical next steps

