How exactly do i use a ps2 gameshark?

May be...

Where could i get a ps2 gameshark and how do i use it? any answers are very appreciated =)

It's easy really, all you have to do is pop in the Game Shark disc, then pick a game from the selection the Game Shark has (you can add more manually if you want) Then highlight the cheat codes you want Ex. Infinite health...Etc, then click start then take out the Game Shark and insert your game, there you go your cheats are activated =)

u still use a ps2 lol