There are several evolutionary items that you will need to find in order for your Pokémon to evolve. These items are essential in Pokémon Brilliant Diamond and Brilliant Pearl if you want to receive specific Pokémon. One of the many evolutionary items is the Dawn Stone, and there are a few ways to find one. So, here's where you need to go if you want to find a Stone of Dawn in Pokémon Brilliant Diamond and Brilliant Pearl.
When it comes to the Dawn Stone, it is similar to the Dusk Stone. The quickest way to find this evolutionary item is to catch a Pokémon with the Collect ability. If they have the Pickup skill and are in your party, they have the ability to pick up items for you on your travels. One of the noteworthy items they can grab is a Dawn Stone. When they receive the item for you, be sure to take it away from them so you can constantly grab them as you run around for the game.
Alternatively, you can find Dawn Stones at Mount Coronet, but you'll need to have your own bike at this point. Of the two options, it is better to have a Pokémon with the Pickup ability. For us, we were able to catch a Pachirisu on Route 205 with this ability and acquired it on our travels. However, there are many other Pokémon with this ability.