Grand Underground Guide for Pokémon Brilliant Diamond & Shining Pearl


The Grand Underground made a triumphant return in Shiny Diamond Pokémon and Shiny pearl on Nintendo Switch. This feature is accessible from the start of the adventure, right before the second Gym Battle, so it’s worth picking up the Explorer Kit as soon as possible. This iteration of the Grand Underground has received a number of changes, such as the addition of Pokémon hiding places and increased shine chance. So to help you, this guide will teach you everything you need to know about the Grand Underground in Shiny Diamond Pokémon and Shiny pearl.

How to unlock the Grand Underground in Pokémon Brilliant Diamond and Shining Pearl

After dealing with the Team Galactic shenanigans in the town of Floraoma, you will eventually make your way through the Eterna Forest before setting foot in the town of Eterna. Upon arrival, simply enter the house next to the Pokémon Center and talk to the old man, and you will receive the Explorer Kit. This will then allow you to enter the Grand Underground at any time by simply using the Explorer Kit in your inventory.

Meet rare Pokémon in hiding places

Grand Underground Guide for Pokémon Brilliant Diamond & Shining Pearl Hideaway in BDSP

A brand new feature has been added to the Grand Underground in Brilliant diamond and Shiny pearl called Pokémon hideouts. As you explore the dungeons, you will notice titles with a big question mark – this signals that you are about to enter a Pokémon hideout.

Great underground guide for Pokémon Brilliant Diamond & Shining Pearl BDSP Golbat in hidden combat

Make sure to take advantage of these caverns, as you can find rare Pokémon there, such as the elusive Munchlax. Additionally, you might have a better chance of finding a Shiny Pokemon in Hideouts, but this is still under community investigation.

Go find a treasure!

Great excavation of the underground wall of the BDSP

On the Grand Underground map, you will notice these orange sparkles on the map screen indicating that certain items can be obtained. By pressing A while standing next to one of these visual clues, you’ll be able to dig for treasure, letting you receive fossils, held items, and more. If you’re having trouble locating the exact position you need to be in, press R to activate a speed camera, which will give you additional visual indication of where to stand.

BDSP underground excavation

There are two tools to help you claim your goodies, the hammer and the pickaxe, but you have a limited number of hits before it collapses. This is visible to you at the top of the screen with the crack, which will grow larger as you try to dig. Don’t overdo it, as you might miss some important points. For example, in Brilliant diamond, you can find the Skull Fossil to receive a Cranidos, while in Shiny pearl, you have a chance to get the Armor Fossil, allowing you to get your hands on Shieldon.

Large Underground digging for objects

How to create a secret base in the Grand Underground

underground secret bases bdsp

If you played Ruby Pokémon and Sapphire or their remakes, Omega Ruby and Alpha Sapphire, you might know the secret basics. In Shiny Diamond Pokémon and Shiny pearl, the Grand Underground is home to secret bases, and this guide will show you how to create one. To get started with the secret basics, you need to acquire a digging drill – these can be obtained from vendors on the subway, so be sure to talk to people when you see them. However, you can get one for free if you talk to the man in the basement after exploring the basement a bit.

Great Underground Guide for Pokémon Brilliant Diamond & Shining Pearl BDSP Alakazam Statue

Once you’ve chosen a location for your secret base, use the Digging Drill to set it up. However, if you later decide to move it, buy another digging bit to move it to another location. To decorate your secret base, extract items from the various underground tunnels to receive cosmetic products such as statues, pedestals, etc. Placing statues for specific Pokémon will also manipulate their spawn rate in Subway hideouts.

Diglett Dig in this minigame

Diglett BDSP underground mini-game

During your escapades in the Grand Underground, take a look at the upper left corner of the screen to notice a counter that goes up to a maximum of 40. This is called the Diglett mini-game, which offers cool rewards for maximizing the bar. While exploring, you may encounter a Diglett or a Dugtrio, and if you interact with them, they run away and leave energy particles behind. The first one rewards the player with 1 point, while the second gives 3 instead.

Once you hit 40, for four minutes the shiny odds in Pokémon hiding places will become 1 in 2048 instead of the usual 1 in 4096. In addition, you will also have a higher chance of finding rarer statues during this time period. . With that in mind, it might be worth going out of your way to meet the iconic types of the floor.

This guide has offered everything you need to know about the Grand Underground in Shiny Diamond Pokémon and Shiny pearl. For advice beyond the Grand Underground, check out our other Shiny Diamond Pokémon and Shiny pearl content of the guide:


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