Shinon asks you to find a bitter plant with three leaves, and suggests asking the Medical Corps for more details.

The Request

Talk to Shinon near the center of Jubilife Village to accept her request.

Find the Pokémon

Anise mentions a pokémon with three leaves that can be found in the Crimson Mirelands. The pokémon is Petilil, which can be found in the Holm of Trials area of the Crimson Mirelands. You won't be able to get the pokémon back, so you may wish to catch more than one.

Reward

After you give Anise a Petilil, you get 3 Fine Remedy and 5 Hopo Berry.