This is our walkthrough for Mission 20 in Pokemon Legends: Arceus called The Researcher of Myths! Below you’ll find each objective for the mission and how to complete them so expect to find some spoilers.
Meet Volo at the Heights Camp in the Obsidian Fieldlands
Travel to Heights Camp in the Obsidian Fieldlands and approach Volo to trigger a cutscene.
Search for a plate in Grueling Grove in the Obsidian Fieldlands
Head to the Grueling Grove in the northeastern part of Obsidian Fieldlands and approach Volo near the lake. A fight with a level 60 alpha Vespiquen will immediately trigger. Either catch or defeat it to receive a Stone Plate.
Learn more from Cogita about the myths surrounding Arceus
Return to the village then set out for the Ancient Retreat and speak with Cogita. Exhaust all the dialog option to receive lots of new missions and complete this one.