How do you get a mystery gift from friends?

In order to get a gift via Mystery Gift from a friend, the gift will need to be sharable and your friend will need to share it however all sharable gifts will have a specific number of limits the friend can share it. Also Nintedo of America never distributed anything that was sharable, Nintendo of Japan is the only one that allowed an event to be sharable and the only one that they allowed was the Secret Key for their Pokémon Platinum players. In the event of a friend sharing a gift, you would need to select "Get from a friend" in the Mystery Gift menu." Mystery Gifts are not sharable after Pokémon HeartGold and SoulSilver.