Downloading an "All SNES ROMs Pack" is illegal in most countries, including the United States and the EU. Nintendo has aggressively pursued legal action against ROM distribution sites (e.g., RomUniverse and LoveROMS ).
Enter the digital holy grail:
You have likely heard the rumor: "It's legal if you delete the ROM after 24 hours." This is false. There is no such law. All Snes Roms Pack