No.
What is gameshark
As long as you have the proper codes for your version of the software you shouldn't have any problems getting it to work.
No.
you need a gameshark code
gameshark.com
well, something's wrong with ur gameshark or the code's wrong.
You can just manually type them in depending on the system you use, some gamesharks allow you to hook them to your computer and update them or in the case of a playstation 2 one, you can add the codes to a usb thumbdrive and update the codes onto the gameshark memory card for use.
Use a Gameshark (I lost my Gameshark code for it)
It is entered by having the gameshark & the emerald inserted into the gameshark, then turn on the Gameboy Advance & the Gameshark should have the cheats for that game on the menu, if not they can be entered manually, for the cheats go to their website (they will have them).
gameshark code
A34dv1saop987fdcz
Here is the Gameshark Code: [Must Be ON] Pokémon Sapphire Infinite Money Code: E51E97C3 7858E4EB