Explore the Grand Underground in Pokémon Brilliant Diamond & Shining Pearl

Unlock the Secrets of the Grand Underground!

Discover hidden treasures, battle wild Pokémon, and create your own secret base in this vast network of caverns and tunnels.

Start Your Underground Adventure!

Grand Underground

The Grand Underground is a vast network of caverns and tunnels in Pokémon Brilliant Diamond and Shining Pearl. Explore its depths, uncover hidden items, battle wild Pokémon, and create your own unique secret base. It's an adventure waiting to be explored!

Hidden Items

Discover rare and valuable items scattered throughout the Grand Underground.

Wild Pokémon Battles

Encounter and battle a wide variety of Pokémon in exciting underground encounters.

Secret Base Creation

Design and customize your own personal secret base, complete with decorations and unique features.