The Enigma Crystal was an event where you could get it via Wi-Fi from November 27th, 2009 through January 11th, 2010.
by special event in fall of 2010
Wifi event or maybe action replay
it's an event. pewter city (Enigma crystal)
its an event that already past look for updates on serebii.net
youcan onlyy get it through a wifi event or a haking device either way u cant just get it in the game without some tradeYou may be referring to the Enigma stone, not the enigma crystal (which doesn't exist). The stone can only be obtained via a Wi-Fi event. Sadly, the event has long since passed. It is no longer possible to obtain the enigma stone.
theres a wifi event to get that don't know when it comes out :-)
It was a exclusive event held by Nintendo which is now over.
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
So far no one really knows...
Event Only Which i Dont Think Has Happened Yet Sorry. Look On Serebii.net or Bulbapedia they Seem Up To Date With Events And Such .
The use of the word enigma is apparently an enigma to you! Delicious irony!
The Enigma goes by Slug.