Gold and Silver weren't just more of the same, they added a full new cast of monsters to catch, a night and day cycle that had impact, and included the entire first region as a bonus for beating the game. (modojo.com)
First regions able to do so are: - > Europe, (kryptomoney.com)
And what I've just said applies to anyone: normally there's always a Samsung page on facebook and a Twitter account for your region / country so ask them first (sammobile.com)