Careful! This can destroy your game1
First get a gameshark then look online for codes after that put the gameshark in the leafgreen game then type in codes. Also the codes can get you Pokemon and items instead of looking and looking you can get them easily. Most gamesharks are $15 to $20. Hope this helps ;)
go to gameshark.com-buy gameshark
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No, you cannot. Because you have to put the codes into the GameShark itself and then put your game in.
Hi @!*$^#&*%##$
with a gameshark only
You can search for GameShark codes on google by typing "GameShark Codes" and after type for either Ds, Vba, etc. You can also check in youtube and search it but give the specific name and software of the game. Example: 'Pokemon Leafgreen Gameshark Codes'.
go to neoseeker.com, supercheats.com, or gameshark.com
You can't catch mew on leafgreen you need gameshark codes for that
on the gameshark
You need a gameshark, and gameshark codes. In other words "dirty cheating which ruins your game"
You will need a Action Replay(or it might be Gameshark) and you can find codes on Google.