Nand.bin Melonds |top| -

Being able to boot into the actual console interface rather than straight into a game.

Some "DSi-enhanced" games may only show their extra features (like camera support) when running in an environment with a properly configured NAND. nand.bin melonds

You primarily need nand.bin if you want to use in melonDS. Without it, the emulator defaults to regular DS mode, which lacks: Being able to boot into the actual console