Pokémon Brilliant Diamond & Shining Pearl: The Grand Underground map and guide

The underground area from the original Pokémon Diamond and Pearl has received such a big upgrade it’s known as the “Grand” Underground in Pokémon Brilliant Diamond and Shining Pearl. There’s lots to do and see, so the following resources should make your spelunking a little easier. Within the Grand Underground, you’ll be able to dig for valuable items and hunt for rare Pokémon

Unlocking the Grand Underground

It doesn’t take long to unlock the ability to visit the Grand Underground; once you reach Eterna City, you can obtain the Explorer Kit required to access it from the Underground Man in the house next to the Pokémon Center. You will be transported to the Grand Underground to explore for yourself right after obtaining it.

Annotated map of the Grand Underground

During your adventures in the Grand Underground, there are some very special NPCs that you may want to locate. You can expand your base, trade spheres with vendor NPCs that are looking for different sizes of spheres and heal your Pokémon. The map below uses symbols to display where you can expand your base, the location of large sphere vendors, the location of small sphere vendors and the location of medics, along with an overall look at the Grand Underground itself.

The map above is based on one originally created by nakfu1 of Reddit!

Diglett and Dugtrio appearances in the Grand Underground

You may see Diglett and Dugtrio appear, but scurry away before you can reach them. They will leave energy for you to pick up, 1 if it was a Diglett, 3 if it was a Dugtrio, and there are special bonuses if you collect 40 energy in one play session. Your chances of finding a Shiny Pokémon become 1 in 2048, essentially doubling from the normal rate. You are also more likely to find a Gorgeous Box while digging.