Location: This quest can be found in Hotto.
Objective: Track Down the Long-Lost Legendary Treasure
The first step in tracking down the treasure is to head to the Hotto Shrine. Once there, head to the Shrine Maiden’s quarters in the back and read the book on the shelf. This will give you a hint to where the treasure is located. For the next step, make your way to Mount Huji then head to the hideout. Climb the long ladder in the hideout to reach the Secret Entrance. Follow the path all the way to the end (shown in the image below) to find a shiny gold object on the ground. Pick it up to acquire the Chest of Hotto Stuff. Return to Iago at the Hotto Inn and hand over the Hotto Stuff to complete the quest.
Reward: Uber Agate of Evolution