A new online tournament for Pokémon Omega Ruby and Alpha Sapphire has been announced called the 2016 International Challenge June (2016 インターナショナルチャレンジ June). Details of this tournament have been added to our 6th Generation Online Tournaments page and are also listed below.

2016 International Challenge June (2016 インターナショナルチャレンジ June)

Information
Region: International Registration Period: Thursday, June 16, 2016, at 00:00 UTC through Thursday, June 23, 2016, at 23:59 UTC Tournament Period: Friday, June 24, 2016, at 00:00 UTC, through Sunday, June 26, 2016, at 23:59 UTC Max number of participants: 50 000 Ranking Results Announcement: July 2016 Player divisions: Junior/Senior Division: Born 2001 or later Masters Division: Born 2000 or earlier Compatible Games: Pokémon Omega Ruby and Pokémon Alpha Sapphire Battle Type: Double Battle Banned Pokémon: Players could use Pokémon with National Pokédex number 1 through 721, with the exception of the following: Mew, Celebi, Jirachi, Deoxys, Phione, Manaphy, Darkrai, Shaymin, Arceus, Victini, Keldeo, Meloetta, Genesect, Diancie, Hoopa, and Volcanion. Players could register a maximum of two Pokémon to the Battle Box from the following list: Mewtwo, Lugia, Ho-Oh, Kyogre, Groudon, Rayquaza, Dialga, Palkia, Giratina, Reshiram, Zekrom, Kyurem, Xerneas, Yveltal, and Zygarde. Pokémon brought over from Pokémon Black, Pokémon White, Pokémon Black 2, or Pokémon White 2 via Poké Transporter could not participate in this competition. Entry Gift: Qualified participants will receive 2,000 Poké Miles, which can be used at the PokéMileage Club on the Pokémon Global Link. To qualify, players must earn a place in the rankings by completing at least one battle. In addition, as a big thank you and congratulations to everyone who had qualified by participating in a Play! Pokémon event and earned at least one video game Play! Point during the 2016 season received a Shiny Mewtwo.
Description
The 2016 International Challenge June is one of the last chances to test players best battle strategies in the 2016 season! Top players were eligible to earn Championship Points as progress toward an invitation to the Pokémon World Championships in San Francisco, California, in August 2016. All battles were Double Battles played in Pokémon Omega Ruby and Pokémon Alpha Sapphire. The competition used the Double Battles format and players had to register 4 to 6 of their level 1–100 Pokémon to their Battle Box. Pokémon automatically became Level 50 during battles. A 15-minute time limit for each match was automatically enforced in-game, beginning at the start of each battle. If the outcome had not been determined when the time limit expired, the game automatically applied tiebreakers to determine a winner. At the beginning of each battle, players had 90 seconds to select their Pokémon to battle with. At the beginning of each turn, players had 45 seconds to select a move or change Pokémon in battle. If a player had not made his or her selections at the end of this period, the game automatically made selections for the player. Players could battle up to 15 games per day of the competition. Any unplayed games would carry over to the following day.

Source: https://3ds.pokemon-gl.com/information/59cd6f6d-9041-49af-9e28-15df86026a30

Play in the 2016 International Challenge June and Get a Shiny Mewtwo!

As a big thank you and congratulations to everyone who has qualified by participating in a Play! Pokémon event, we'll be giving out an awesome Shiny Mewtwo! Anyone who has earned at least one video game Play! Point during the 2016 season and is opted into the Play! Pokémon program before July 10, 2016, will receive an email in late July containing a code for Shiny Mewtwo.

Source: https://3ds.pokemon-gl.com/information/be7fa1cc-65a1-4b5f-8c09-ff6dc2c1fa91