From Bulbanews, your community Pokémon newspaper.
Gates to Infinity to be released mid-May
The DLC dungeon Poké Forest for Pokémon Mystery Dungeon: Gates to Infinity will be free from the game's release until June 21 for Europe and Australia.
In Belgium, Germany, France, The Netherlands, the UK, Spain and Italy, it will cost €1.50 after June 21. In Portugal, it will cost $1.50 after June 21. In Australia, it will cost $2.00 after June 21.
Poké Forest will be available starting May 17 for Europe and May 18 for Australia.