

Just make sure you're not in a house or cave, because access will be barred! The Grand Underground can be accessed from the majority of the Sinnoh region in Pokémon Brilliant Diamond and Shining Pearl. Grand Underground map in Pokémon Brilliant Diamond and Shining Pearl If, however, you do wish to complete the tutorial, return to the old man after you complete each of the tasks until he doesn't have any left you. This includes entering and exiting the Grand Underground and building a Secret Base, which he'll give you a Digging Drill for.Ĭompleting this tutorial is not necessary and you can simply focus on enjoying the Grand Underground the moment you have the Explorer Kit. He'll give you the Explorer Kit, which can be found in the Key Items pocket of your bag, and a short tutorial on how the Grand Underground works. The Grand Underground is unlockable the moment you set foot in Eterna City - simply visit the house next to the Pokémon Centre and talk to the old man inside. This is the third major city you'll visit in the game, containing the second Gym, and takes roughly five hours to reach. To unlock the Grand Underground in Pokémon Brilliant Diamond and Shining Pearl, you must first reach Eterna City. Watch on YouTube How to unlock Grand Underground in Pokémon Brilliant Diamond and Shining Pearl

Within the Grand Underground, you'll find Pokémon Hideaways, which contain Pokémon from other regions, such as Houndoom. The Grand Underground in Pokémon Brilliant Diamond and Shining Pearl is the reworked version of the Underground network of the Sinnoh region from the original games.
