Dagero needs your help to identify another Pokémon in a photo. This time around, your quest will take you to the Cobalt Coastlands in search of a ghost-type Pokémon that veterans of the Pokémon series will be all too familiar with. Here's how you complete the Pokémon in the Night Photo request in Pokémon Legends: Arceus.
You will unlock this request when you gain access to the Cobalt Coastlands area. You must also have completed Dagero's other request, the Pokémon pictured in the woods. Go to the photo studio and talk to Dagero, just like in the previous request, he will give you a reference photo and ask you to find the Pokémon. The Pokémon you are looking for is Duskull.
Get to the Cobalt Coastlands. If you degenerate to Beachside Camp, go down the hill and go right. Make sure you rest until the night before embarking on the journey. Follow the coast until you reach Deadwood Haunt. Along the way, you may come across an NPC who will ask you to set up Coastlands Camp. It will be easier to have that camp set up to help you complete this request in case you have to spend multiple nights in this place. Once the night comes, you will see a lot of Duskull in the area. Duskull has a large detection range and will attack you on sight.
Once you've captured a Duskull, return to Dagero to get your reward. It will reward you with more options to use in the photo studio. Make sure you take lots of photos.