For emulator users (PCSX2), the Codebreaker V12 ISO is the standard method for enabling cheats that the emulator's native patch system does not support.
The Codebreaker was a cheat device released for the PlayStation 2, competing directly with the Action Replay Max and the Gameshark. Unlike modern trainers or PC mods, the Codebreaker was a disc that you inserted into the console before your game disc. It loaded a database of codes into the PS2’s memory, altering the game's behavior once the actual disc was loaded. Codebreaker Ps2 V12 Iso