The Poké Pelago is an area that opens up after Kiawe's trial, where you use the Pokémon from your boxes and have them participate in helping you play games to find a variety of Pokémon, items and more. It is accessed from the menu at any time which flies you to there. It is run by the character Mohn who will help you develop the island in order to get more features. These islands make use of the Pokémon that are in your Boxes
The main feature of Poké Pelago are Poké Beans. These are obtained in the Poké Pelago and can be used to boost effects in it, as well as being fed to Pokémon in Pokémon Refresh.
Mohn will help you develop the islands, as well as exchange Special PokéBeans for standard ones. Patterned Beans can be exchanged for 3 PokéBeans while Rainbow Poké Beans can be exchanged for 7 standard Poké Beans. You can also, once a day, send out a Bean Bottle. This will put 7 of your standard beans out and distribute them across the Internet to other players and you will sometimes find Bean Bottles from other players turn up on your game.
When you use Poké Beans for additional effects, they only last a certain amount of time. Each crate on each island can hold up to 20 (Level 1), 30 (Level 2) or 50 (Level 3) Poké Beans. Regular Beans last 20 minutes each, Patterned Beans last 1 hour and Rainbow Beans last 2 hours.
In addition to this, the effects and yield of each of the islands increases as you level them up, meaning more items will appear with high levelled islands.