Dream Islands

After you have befriended Drifloon, you have the ability to use its specialty to go to a Dream Island. Dream Islands are a special island you can visit once per day in order to get a variety of rare items and ore such as gold and Poké Metal

These islands have no wild Pokémon in, but can have various items, recipes and more for you to find while you are stripping them of all of their resources

Once you have returned from the Dream Island, you can use the resources as you see fit, though anything you have left on the island cannot return as the island resets at the end of the day so be sure to return to it if you left something there.

When you go to an island, there is a chance that you can find a Legendary Pokémon, specifically Raikou, Entei, Suicune, & Mewtwo

On each Dream Island, you will find various rare finds. These include notebooks from people giving some hidden lore int he game, outfits based on various main series characters such as Blue, Green and Ethan as well as various rare items including Pokémetal Ingots

Each trip will also provide tips for various habitats you have yet to discover