Is there any reason to play with the overworld Pokemon?

Is there any reason to play with the overworld Pokemon? - Free stock photo of active, activities, adolescent

In Pokemon Ultra Sun and Moon, there are various overworld Pokemon you can interact with, where you and it get to play. Some examples of the actions are spinning to the left, right, and playing peekaboo. Is there anything hidden in this, or is it just a cute little distraction?

pokemon-ultra-sun-ultra-moon

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A Reason to Prefer Overworld Encounters

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Kampus Production, Kampus Production, Bethany Ferr, Bethany Ferr