How do you get a dusk stone in Pokémon Mystery Dungeon?

In Pokémon Mystery Dungeon games, Dusk Stones are typically found in dungeons as rare loot or rewards for completing missions. It's best to explore different dungeons and complete missions to increase your chances of finding a Dusk Stone. You can also try battling wild Pokémon that are known to drop Dusk Stones as a held item.