Is Action Replay/Gameshark the same thing?

Answer 1

No they are not the same thing they are two different companies with the same goal but if you look at the two, Action Replay is more user friendly. But the Gameshark on-line site is nicer and more organized

Also, both Companies use different codes to alter the game.

Answer 2

Action Replay and game shark are two of the most popular video game cheating devices for home consoles. They are essentially the same thing but they are made by two different companies.