ILCA / The Pokemon CompanyThe Sinnoh region has numerous rare Pokemon beneath your feet in Hideaways as part of a vast network, as in Pokemon Brilliant Diamond & Shining Pearl, you can explore the Grand Underground. These are a series of interconnected mini terrarium-like rooms called Hideaways, all of which contain different Pokemon.
That’s not all though, as after you’ve unlocked the National Dex, received the Icicle Badge, and found the TMs for Surf, Defog, and Waterfall, more Pokemon will appear in the Grand Underground.
So, here’s a list of every Pokemon in Brilliant Diamond & Shining Pearl’s Grand Underground, alongside the locations you can find them at, any requirements, and which are version exclusives.
BDSP Grand Underground list of all Pokemon
Before National Pokedex
Pokemon | Sprite | Locations | Exclusivity / Requirements |
|---|---|---|---|
Absol |  | Sand, grass & crystal caves, Sunlit Cavern, Big Bluff Cavern, Stargleam Cavern | N/A |
All National Pokedex Pokemon
Pokemon | Sprite | Locations | Exclusivity |
|---|---|---|---|
Aron |  | Rocky Caves, Whiteout Cave, Icy Cave, Glacial Cavern, Big Bluff Cavern | N/A |
More helpful guides
- All Grand Underground Pokemon
- All Rare Candy locations
- All trade evolutions
- How to walk with your Pokemon
- Mystery Gift codes guide
- Trade codes to get version exclusives
What’s the point of the Grand Underground?
The Grand Underground offers players a wider selection of wild Pokemon that they can acquire for their journey throughout Sinnoh. What’s more, it also offers a chance to find ‘mons from different regions, especially ones from Kanto.
The minigames in the Grand Underground also give you fun activities to do outside of the main storyline, such as creating your own Secret Hideaway and stocking it up with rare decorations (as shown in the image below). That being said, you’re free to ignore the Grand Underground if it doesn’t pique your interest.
The Pokemon CompanyNow you’re up to date with all the Pokemon in Brilliant Diamond & Shining Pearl’s Grand Underground, for more Gen 4 remake guides, check out our guides on Pokemon BDSP Version exclusives, the best starter to pick in BDSP, and Pokemon BDSP Trade Codes.
