A pair of Aipom stole Hiko's pack and he asks you to get it back from them.

The Request

Talk to Hiko in the Cobalt Coastlands to accept the request.

Follow the Aipom

Go to the guidance marker to find the two Aipom. They will go farther away. Keep following them until you have to battle them.

Reward

After the battle, you get 5 Scatter Bangs and 1 Exp. Candy M.