For the Mutual Cooperation Railway Quest in Dragon Quest Treasures, you’ll be tasked with the following 3 tasks:
Gather some royal soil
Examine the console next to the train then select The Snouterhorn in The Paternoggin as your destination. When you arrive at the destination, take a right and head past the campfire following the path through the fence. Just before the metal roof walkway, swing right around the cliff then forage the ore deposit to find some royal soil.
These ore deposits can be found throughout this whole area if you’d like to gather more!
Scout an orc
Continue working your way down to the grassy area where you’ll find plenty of orcs. Be sure to use the Buddy Pellets that were given to you on an orc. You’ll know you’ve successfully scouted one when a tutorial prompt appears for Successful Scouting. In order to complete this objective, you’ll need to speak with Miss Cecily at the Personnel desk, however, hold off on doing that for now as you still need to complete the below objective. Please note that there is a fee to recruit an ogre. For us, it was a Wondrous Wheat which can be foraged from plants around The Snouterhorn.
Obtain some sanguinite
Continue pressing through the area, heading towards the objective marker. When you arrive, an event will trigger with Captain Levanter. He’ll inform us that Gayle might have some sanguinite. Head through the Sylphanian Stockpile to find Gayle on a boat. Speak with her then defeat her in battle. Afterwards, you’ll learn the Fortune Finder! Follow the Fortune Finder to the area as shown in the picture below.
Once there, your monsters’ visions will become available. View them then head to the top of the nearby cliff to find the glowing mist.
Press and hold A to dig up sanguinite.
Speak with Mr. Euston
With your tasks now complete, head to the top of the nearby cliff to find the rock platform that was shown in the image.
Hold L and press whichever button your bat is on to use the “Glide” Forte. This is a shortcut to return to the train. Once you land, head straight across the metal roof and climb up the hill. Interact with the console next to the train and select Eggshell Island. When you arrive, head inside the building and speak with Miss Cecily to recruit the ogre. Afterwards, speak with Mr. Euston to complete this quest.