The Pokémon Global Link website has announced the full details for the Fairy Face-Off Online Competition (フェアリーガーデン) which will take place from Friday, September 26, 2014, at 00:00 UTC through Sunday, September 28, 2014, at 23:59 UTC.

It was also announced that the Fairy Face-Off would be the first tournament to use the 2015 Season Age Division Update. The new age divisions are: Junior Division: Born in 2000 or later and Masters Division: Born in 1999 or earlier.

Information
Region: International Registration Period: Thursday, September 18, 2014, at 00:00 UTC through Thursday, September 25, 2014, at 23:59 UTC Tournament Period: Friday, September 26, 2014, at 00:00 UTC through Sunday, September 28, 2014, at 23:59 UTC Ranking Results Announcement: Friday, October 3, 2014 Max number of participants: 50 000 Player divisions: Junior Division: Born in 2000 or later Masters Division: Born in 1999 or earlier. Battle Type: Single Battle Pokémon Restrictions: Players could only use Fairy-type Pokémon from the National Pokédex (including dual-type Pokémon as long as one of the types is Fairy), excluding Xerneas and Diancie. Players could use only Pokémon found, caught, hatched from an Egg, or received through a special promotion in Pokémon X or Pokémon Y. Pokémon brought over via Poké Transporter could not participate in this competition. Entry Gift: 1000 PokéMiles
Description
The age divisions for Online Competitions were updated for the 2015 Season and the Fairy Face-Off was the first competition affected. The new age divisions were: Junior Division: Born in 2000 or later and Masters Division: Born in 1999 or earlier. Fairy-type Pokémon have been an exciting addition to the Pokémon battling scene and the Fairy Face-Off! Online Competition allowed only Fairy-type Pokémon. The competition used Single Battle format and players could register 3 to 6 of their level 1–100 Pokémon to their Battle Box. Pokémon automatically became Level 30 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 only play 10 rounds per day.

Sources: http://3ds.pokemon-gl.com/information/51792d84-32c9-493c-b468-abad2e914e2e and http://3ds.pokemon-gl.com/information/5b2bfdf8-b14b-4b8b-97a2-ad6ad2365b7b