All of these cheats were created for the PAL (UK) versions of the games. They may work on other cheat cartridges (Action Replay, Game Shark, etc), but no guarantees! I always put my initials at the end of each game title so I can easily spot which ones are mine. All cheats are created for PAL versions of games, but may not work on Game Shark or Action Replay, but there’s no guarantee that they will work on any other cartridges, Action Replay or Game Shark.”]
Source: http://www.murraymoffatt.com/playstation-xplorer-cheats.php