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"The Eon Ticket has been spreading across the globe via StreetPass from one Pokémon Omega Ruby and Pokémon Alpha Sapphire player to the next. With the Eon Ticket, players have been able to return to Southern Island for the chance to catch either Latias or Latios in their game (whichever Pokémon they weren't able to get during their original adventure).
If you haven't had the good fortune to receive the Eon Ticket from another Trainer, now there's another way. Between Friday, February 27, and Monday, March 2, 2015, check back at Pokemon.com to get a code that you’ll enter in your game to receive the Eon Ticket.
Note: if you already received the Eon Ticket for your Pokémon Omega Ruby or Pokémon Alpha Sapphire game, you won't be able to receive it again."
[url=http://www.pokemon.com/us/pokemon-news/another-chance-to-get-your-ticket/osz]Source[/urlosz]