Right now, I think a few extra master balls on my ROM file would be good. I use the ROM as a backup for all my retail pokes. So I trade the retail poke over. Back up the ROM sav onto my harddrive, then trade my pokes back to my retail game. Then I do it again, and again, and that's how I clone. But I haven't gotten around to cloning my single master ball yet. I have to get this Tornelos guy caught before I can do anything else with the retail game.