its a wifi event.
You can't. You need to trade it from Heart Gold, or get the enigma stone through a wi-fi event
Wifi Event but its over now
Wi-Fi Nintendo Event.
Through an action replay code
i think you can
No, there isn't another date to get the enigma stone. The enigma stone event has already passed. There most likely won't be another enigma stone event.
Other than the current Enigma Stone event, there is no official event yet. But there will be one for Celebi.
You can get latios after you meet Steven, and latias through the enigma stone event.
You can't unfortunately, as it's an event item.
A Wi-Fi event (not currently available in North America).
No Pokemon evolves by using the enigma stone or enigma berry.