Radisa wants you to research Octillery so she can use its ink as a recipe ingredient.

The Request

Talk to Radisa in Jubilife Village to accept the request.

Research Octillery

Octillery can be found at Islespy Shore in Cobalt Coastlands.

Reward

You will get 5 Bean Cake and 1 Exp. Candy M as a reward for showing Radisa the completed Octillery Pokédex entry.