Pokemon Brilliant Diamond and Shining Pearl Grand Underground Guide

The Grand Underground in Pokemon Brilliant Diamond and Shining Pearl is an underground area that can be accessed at any point using the Explorer Kit, obtained from the Underground Man found in Eterna City. Depending on what section of the Underground you want to be in you will need to use the Explorer Kit.

Map of Grand Underground Locations and were you can access the underground, just below that you can find links to out guides on each of the Grand Underground Cave Locations and what pokemon spawn.

In the Underground, one of the main things you can do is excavate the walls and dig up useful materials and items. To begin excavating you will need to look at your map for shining marks on the walls and interact with them. That will begin a mining mini-game which allows you to dig up items, these items include; Spheres, Fossils, and Plates.

 

Below is a list of all the Spheres that can be found in the Underground in Pokemon Brilliant Diamond and Shining Pearl. Spheres are the currency of the Grand Underground. Spheres can also be buried in the Underground if left for a while, their worth and size will increase.

Vendors are stationary NPCs that can be found all around the Underground, some sell traps, items, and decorations for your base. Their prices and stock change daily and they accept Spheres as currency.

 

Below is a list of all the pokemon you will encounter while adventuring the Grand Underground in Pokemon BDSP. Depending on how far you are in the game will determine the pokemon levels you will encounter in the grand underground; reaching these checkpoints will cause NEW pokemon to begin to spawn in the underground.

Grand Underground Locations and Pokemon Spawns

Below is a list of all the fossils that can be found in the Grand Underground. They can be taken to the Oreburgh Mining Museum to be revived into a Pokemon.

Plates are items that increase the Power of certain moves when you equip your pokemon with this item, they are also used to change Arceus Type when held.

Miscellaneous Items are items that you will find instead of Fossils, Plates and Spheres. These items range from held items such as Fire Stones, to Max Revives. If you have no use for these items, you can sell them to the Vendors for extra currency.

Almost all Slates in Pokemon Brilliant Diamond and Shining Pearl are items used to encounter Legendary Pokemon in the Ramanas Park when brought to the correct pedestal. Slates can be obtained by trading Mysterious Shards in the Grand Underground. Below is a list of all the Slates and what Pokemon they summon.

The Underground Man who gives you the Explorer Kit is located next to the Pokemon Center in Eterna City. He will give you missions that, if completed- he will reward you with useful items. Below is a list of the missions and their rewards.

Down in the Underground you have an option to make a Secret Base that you can decorate and also use for a mini-game with a friend. To make a Secret base you will need a Digger Drill, one can be obtained from the Underground Man for completing one of his quests, or finding a vendor in one of the corners of the Underground. The Digger Drill is a one use item but more can be obtained. By default you will only be able to place 10 items.

 

Note: The player can only have one Base at a time and if another Digger Drill is used, the old base will be removed.

 

This is a mini-game which can be played with another person and is a Capture The Flag gamemode. You will need to steal a flag from your friend's base and bring it back to your own. This is where traps come into play, there are different kinds of traps someone can place down to slow down their opponents. Some types of traps include; Reversing Player Controls or Strong Winds that blow your opponent in a specific direction. The player can hold up to 50 traps at a time. The winner of the game will obtain upgrades for their own base to allow more items to be placed down. Once you capture at least 50 flags, all of the boulders left in your Base will be removed.