This page offers a guide on how to accept and complete Request 13: Trees that Bear Berries in Pokémon Legends: ARCEUS.
This quest is picked up from Bjorn, who is found just along Deertrack Path in Obsidian Fieldlands. He’ll ask that you collect him x3 Cheri Berries.
Where to Find Cheri Berries in ARCEUS
You can actually find a cheri berry tree just to the left of Bjorn - it’s the blue tree with orange looking berries. To get the berries, equip a Pokéball that has a Pokémon in it (any will do!) and throw it at the tree using . The Pokémon inside the chosen Pokéball will then bash the tree to drop the berries, which (if there’s space in your pockets) will be picked up automatically.
Once you have the Cheri Berries, speak to Bjorn again and hand him the x3 Cheri Berries. In return, he’ll give you a handy tip about throwing fruit out to distract Pokémon. You’ll also get x15 Pokéballs as a reward!