Yeo wants to learn more about Kricketot and asks you to show her the completed Pokédex page for it.

The Request

Talk to Yeo near the Fieldlands Camp in Obsidian Fieldlands to accept her request.

Complete the Kricketot Page of your Pokédex

Kricketot can be found in the Obsidian Fieldlands, in the Deertrack Path area, the Nature's Pantry area, and the Windswept Run area. Complete research tasks to reach Research Level 10, then talk to Yeo.

Reward

After you show Yeo the completed Pokédex page, you get 3 Vivichoke.