How to hack a pokemon game ???

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I have downloaded the pokemon leaf green, advanced map, advanced text, advance starter, and advanced mart. Everything works except for advanced mart. Once I open the rom in advanced mart something pops up that says that it dosent work. Can someone please tell me how to use advanced mart and give me the link to download a good copy.

Also, is there a way to put masterballs and rare candies on the map without using advanced map?

Thanks and could someone plz just tell ne some detailed steps on how to use the other programs plz? Thanks