There's plenty of side quests in Monster Hunter Stories 2, but a few of them are extremely tricky to find. One such quest is (Hard) Camouflage Expert, where you have to locate and defeat a monster.
Reading the quest information, you can only find The Immovable Boulder in the Evening and in a particular location. You can do both of these things at the same time.
Open up your Quest Info, and find the (Hard) Camouflage Expert quest. When the quest is highlighted, Press Y if using an Xbox controller, Z on PC, or Y if playing on the Switch. This will open up the fast travel menu, and the location you need will be automatically selected—Sailor's Beach. Confirm this location, and then choose Evening in the pop-up box that appears.
The Immovable Boulder is a Basarios and is located to the west upon appearing at the Catavan Stand in the area called Prospect Hill. Head to the location shown in the image below.
Make sure you have a Power Attack Type Monstie as your lead Monstie, and then a Speed Attack Type to change into when the Basarios becomes enraged. This will make the fight so much easier.
Because this monster has a name and has Hard in the quest title, this is not a walk-in-the-part fight. Don't take it lightly!
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