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.
Wi-fi event!
In a Wi-fi event.
You can't unless you cheat
Check the back of the Enigma Stone Wonder Card.
The only way to get it is through the enigma stone wi-fi event. Otherwise you need to hack or cheat.
Wi-Fi Nintendo Event.
you look for it on the internent
Type your answer here... the action replay for the enigma stone is : Enigma Stone 94000130 FCFF0000 621118C0 00000000 B21118C0 00000000 20009E4C 00000003 10009E50 00000218 D2000000 00000000
A Wi-Fi event (not currently available in North America).
There isn't going to be one as far as anyone knows.
It's impossible. You have to trade with a Soul Silver game to get it.
No Pokemon evolves by using the enigma stone or enigma berry.