To answer you question, the origin of the cart determines what tag you have. So FRE is a French game, and so on. Vivillon region is determined by where your DS is from. I have a Tundra Vivillon that's got the JPN tag. So they're from Norway, but playing on a Japanese cart of X/Y. I already have a Honedge ready that I could trade for the Sandstorm, before I head to bed.