Your best bet is to not get too deep into hacking, you will get VERY confused.
Want 99 lives? Hit the button, input the current value you want to alter, in this case your number of lives, ley's say 3. Input 3, hit search.......return to game. Die on purpose once. Hit the button, now input 2 -see where this is going? Keep repeating the process until the number of possible codes is down to a few. Try them. Then get into greater and lesser than values.
It only SOUNDS complicated. if you read the manual to the GameShark you should be fine.
DO NOT use keycodes. Some games won't boot without them, but using those things is a bad idea. You can lock up a Gameshark using keycodes and may have to toss the Gameshark in the trash.
No, you can't hack games with a GameShark.
Use a gameshark/ a hack
No.
you need gameshark or action replay gba
You can use a gamecube action replay or a gameshark :)
Use Action Replay or GameShark.
gameshark or action replay hack
In Pokemon firered and leafgreen mew is not in wild , only event or you can use gameshark codes or YOU CAN HACK THE GAME !! THIS is even for AAALLL POKEMON GAMES only event or hack or gameshark
gameshark or hack
Only by event gameshark codes or hack the game
Gameshark codes or console cheats
gameshark