you plug the game into the gameshark and plug the game shark into the game boy/ ds/ sd/psp etc. turn on the console and type in the code.
Yes you can use game shark codes on a game shark sp. There is no difference between the game shark for the GBA and the game shark for the GBA SP.you have to click your game to the side and cheats...
that is the only use. it is a pretty great use.
You can but Hard drives are way better.
put in your memory card in the ps2 then click save on your game wait till its done so u then take out the memory card.
Yes you should be able to but sometimes it depends on the console, eg xbox, ps2 etc