A gameshark has more codes if you lke but action replay is still good.So to answer your question gameshark has more codes and is preety good.
i say the gameshark sucks, but its been awhile since ive used one. i might retract this later, but for now...ALL HAIL THE ACTION REPLAY!!!
i definatly prefer action replay, for any of my games, it has a ton of cheats (same or more then gameshark) and it's easy to use.
Action Reply is a better choice, much more organized and graphic then the gameshark. You also have a low chance of destroying the gameshark once you buy it, it get's mest up if you don't know what you are doing.
All times are (GMT -06:00) Central Time (US & Canada). Current time is 11:00:40 AM