During the Nintendo Treehouse Live broadcast, Nintendo showed off a new mini game called Play Yard, accessible in Pokemon GO Park in Pokemon Let’s GO Pikachu/Eevee.
To play the mini game, you will need at least 25 of the same Pokemon species from Pokemon GO. The goal of the mini game is to gather all of the 25 or more Pokemon into the goal before the timer stops. There will be other obstacles on the way, such as other larger Pokemon trying to disrupt your efforts.
Depending on the results of the mini game, you’ll earn a candy.