Nand.bin | Melonds //top\\

: Without a valid nand.bin , melonDS cannot boot into the DSi home menu. It contains the essential system applications and the unique encryption keys required to decrypt DSi software.

Crucially, the and DS Lite do not have NAND memory. If you only emulate standard DS games (no DSi mode), you do not need nand.bin . You only need the three BIOS/firmware files: nand.bin melonds