Nandbin Melonds

You cannot download a valid NAND.bin legally. It must be dumped from your own DSi console using homebrew software like:

Basic dumping steps (via DSi homebrew):

If everything is correct, you will see the DSi splash screen and menu. nandbin melonds

The melonDS roadmap includes:

The developer, Arisotura (and contributors), actively maintain the GitHub repository. If you encounter “nandbin melonds” bugs, report them there with precise logs. You cannot download a valid NAND

melonDS is widely praised for its high compatibility and local wireless support. However, base DS emulation does not require NAND. The need arises only when:

Without a proper nand.bin file, melonDS will either: Basic dumping steps (via DSi homebrew): If everything

Crucially: melonDS does not provide a nand.bin file. You must supply your own, legally, via a dump from your own console.