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I have 4 connectors. Theres 2 for the gameboy(original gameboy the black and white). And the other two fit into the advance, though now that you brought up the issue of the cable maybe the other 2 are suppose to be for a gameboy color? And they just happen to fit into the gba.
Can you trade from Pokemon Sapphire to Ruby and vice versa without beating the E4 and having the National Dex? Or do you need to complete both before you can trade between the two games?