As you play Coromon, you can catch various Coromon species, meet and battle NPCs, and more. These are tracked via the Milestone system. This may leave you wondering what Milestones are and how they work in Coromon.
The Milestone system in Coromon works as an in-game achievement system and a trainer level. As you complete various objectives, you will receive experience points. Some Milestones are infinite and can be completed repeatedly, while you can complete others a limited number of times.
How to get Milestone rewards in Coromon
Completing Milestones and leveling up allows you to unlock rewards in Coromon. To unlock and get these rewards, go to your Milestone tab. Then, simply scroll to the right. You can see your available rewards and claim them here.
These items range from healing to spinners and some unique items not obtainable elsewhere. Make sure to claim your Milestones and level up so that you can get as many rewards as possible!
For more information on Coromon, check out Where to find the Coromon Basics book in Coromon and Does Coromon have a Nuzlocke mode? on Pro Game Guides.