Some preservationists hardcode cheat modifications directly into a game's ROM file. These files run with cheats permanently enabled without requiring an external cheat menu or software disc. How to Use GameShark Cheats on PCSX2 Emulator
If you are looking to revisit the era of infinite health and unlocked characters, a refers to the digital ISO image of the original cheat peripheral's software. Since the GameShark was originally a physical disc/memory card combo, enthusiasts now use ROMs to run this software on original hardware via modding or on PC emulators like PCSX2. Content Ideas for GameShark PS2