This request is received from Martia, who’s found at the Diamond Settlement in Crimson Mirelands. She’ll ask you to help out her Psyducks by getting her some medicine.
How to Find Secret Medicine
To find the Secret Medicine that Martia needs, you’ll need to head to Galaxy Hall in Jubilife Village and look for Tomma, a sweet old lady leaning against a wall in one of the rooms on the ground floor. It’ll be easiest to find her by activating the request in the requests tab in your Arc Phone.
Once you speak to her, return to Martia in Diamond Settlement and hand her the Secret Medicine to cure her headache-stricken Psyducks. She’ll reward you with x1 Max Revive.