Along with the Sapporo stop in Pokemon Go Fest, there will be an in-game global event scheduled for August 5-7, and there will be a Collection Challenge to catch all of the increased spawns.
This minor event has a grass-type theme, increasing the spawn rate of six different grass-type Pokemon.
The reward for completing the Collection Challenge is the regional Pokemon Pansage, which is normally only available in Asia. It is very probable that Pansage will continue to spawn internationally in a future event (as its other monkey brethren did), but you should always try to complete this challenge.
The Living Meadow Habitat Collection Challenge at Go Fest Sapporo
For a reward, catch the following Pokemon:
- Cherrim (Sunshine Form)
Reward: 2,022 Stardust, 2 Pinap Berries, and a Pansage encounter