The Grand Underground Pokémon Hideaways — Pokémon Brilliant Diamond & Shining Pearl guide

Pokémon Hideaways are the biomes Pokémon live in within Pokémon Brilliant Diamond and Shining Pearl’s Grand Underground. Different Pokémon spawn depending on your game progress; some Pokémon will only show up in specific Hideaway types. Our Pokémon Hideaway guide tells you how Hideaways work, lists out the Pokémon in the different Hideaways, and teaches you how to unlock more Pokémon.

As you unlock HMs and complete other milestones, more Pokémon will appear in Hideaways.

Each Hideaway also has a chance for a rare Pokémon to appear. These Pokémon are not part of the Sinnoh Pokédex, like Absol or Scyther. Once you unlock the National Pokédex, (which you get once you see all the Pokémon in the Sinnoh Pokédex), these rare, non-Sinnoh Pokémon will appear more often.

In addition to unlocking a variety of Pokémon, as you earn more badges and beat the Pokémon League, the Pokémon in the Grand Underground will get stronger, capping out at level 63.

Pokémon Hideaways map

The Grand Underground is broken up into six parts, and the part you end up in depends on where you use your Explorer Kit. It correlates almost directly, which means to access the middle section, you’ll have to jump in from Celestic Town, the middle part of Sinnoh. To access the bottom right part, you’ll need to enter from Sunyshore City, which is the most southeastern area in Sinnoh.

Image: Game Freak, ILCA/Nintendo via Polygon

Pokémon Hideaway spawn list

Below we have spawns broken up by Hideaway type, organized by National Pokédex number, with help from Serebii. We’ve also included the unlock requirements, if there are any.