Software such as melonDS or DeSmuME provides high-speed, accurate emulation for playing these files on modern PCs and mobile devices.
Downloading Pack 2 required a BitTorrent client, an unzipping utility (like WinRAR or 7-Zip), and a flashcart—a device that plugged into the DS’s Game Boy Advance slot (e.g., SuperCard, M3 Simply) or later the DS slot itself (R4). Users would copy the decrypted .nds files onto a microSD card, insert it into the flashcart, and play. Nintendo DS Roms -Pack 2 Games 51-100- TNT Village