Back when Pokémon Quest was announced, the Android and Apple iOS versions were given a June 2018 release window. Now, thanks to the iTunes pre-registration page, we have a possible date. It says the game is expected to launch on June 28, 2018. Update: The official Pokémon Twitter account says it will launch on June 27, 2018.
Both the iTunes and Google Play pre-registration pages for Pokémon Quest are now open. No special bonuses are noted for pre-ordering the game, which has people recruit Pokémon by making various soups, then send them on expeditions into different areas to grow stronger and find more ingredients to attract more Pokémon.
Pokémon Quest is immediately available on the Nintendo Switch.