Sorry kids, you’ll have to be more social with your Pokemon than you originally thought. EON tickets will be required to reach the Southern Island in Hoenn, where trainers can catch Latios (Omega Ruby) or Latias (Alpha Sapphire).
Serial codes for the EON Ticket will be provided through the Play! Pokemon organizers and StreetPass communities and will be active on November 21, the release of Pokemon Omega Ruby and Pokemon Alpha Sapphire. Players obtaining the EON ticket through this manner will obtain it through Mystery Gift, which will provide the player with a Wonder Card. Then, you must bring the Wonder Card to your local in game Pokemon Center (not the one in New York City or Japan) to receive the EON Ticket.
For those of you who would rather not go through the trouble, you can also obtain the EON Ticket through StreetPass. To do so, all players must have StreetPass active within BuzzNav. It will light up when you get the EON Ticket. Then, your local Pokemon Center will have your EON Ticket waiting for you.
Source: Pokemon Press Release