If you're interested in obtaining a Sega Genesis ROMs pack, I recommend exploring legitimate sources, such as the Internet Archive or official game re-releases on modern consoles or PC.
A ROM pack is a collection of game ROMs (Read-Only Memory) that are extracted from original game cartridges or CDs and compiled into a single package. This allows users to play the games on emulators or other devices that support ROM loading. all sega genesis games roms pack exclusive