long story, but basically I bought another emerald version, got it to the battle frontier, saved in the battle tower, THEN connected to box for the first time w/ that cart. After I got the zigzagoon egg I went back and use the cloning glitch to corrupt the save data, so that it reverted to the previous one where the cart had never met box. This works because all of the data from connecting is stored on the carts themselves :)