The Underground is a large area comprised of many corridors located underneath the whole region of Sinnoh, accessible in [i][[Pokemon DPPt|Pokémon Diamond, Pearl and Platinum]][/i].

Multiple players can interact in the Underground via the DS Wireless Communication.

Some activities available in the Undergound include:

* Digging items such as fossils and evolutionary stones from the walls.
* Building and decorating a [[secret_base_(pokemon)|Secret Base]].
* Finding the Secret Bases of other players and capturing their flags.
* Placing traps on the ground, which often negatively affect the movements of players who step on them.

See post #3364990 for a piece of [[official art]] depicting the Underground.

h4. See also

* [[list of pokemon places|List of Pokémon places]]
underground (sinnoh)