Tanren Tunnel

Tanren Tunnel, called TT by players, is a dungeon that connects the Exbel Plains to Tanren City. This dungeon contains mostly Poison types. The most notable aspect about this dungeon is that it contains the rare TM Dig on floors 14 and 15.

The Pokémon in this dungeon are mainly in the level range of 22-30, and there are 15 floors total.

Scenery
The scenery in this place has a darkness that covers your view. It also has fog that is uncommon, and no other weather effects. The walls are a dark rock type look while the ground is a lighter floor made up of rocks. There is no water in this dungeon and the rooms are medium sized.

Pokémon
The Pokémon that are found in this dungeon are mainly Ground and Poison types. All of them are first or second stage evolution Pokémon.
 * Zubat
 * Golbat
 * Geodude
 * Graveler
 * Diglett
 * Onix
 * Koffing
 * Weezing

Items
The items that are in this dungeon are the supplies that are needed to complete a dungeon; there are also various Orbs and TMs that can be found here. This dungeon like many others also has Move Tutor items, such as Big Mushrooms, Tiny Mushrooms, and various Shards.
 * Apple
 * Ether
 * Grimy Food
 * TM Dig (Invisible, ground)(Floor 14 and 15 only)
 * Various Orbs
 * Various Berries
 * Poké
 * Iron Thorn

Dungeon Objective
This dungeons's objective is to beat it in order to gain access to the Tanren Region. There is also a chance of getting the item TM Dig, which is only acquired through this dungeon.

Trivia

 * This is the first dungeon to have TM Dig.
 * To the north of the entrance of TT, there used to be a secret shortcut directly into Tanren without needing to complete TT. That shortcut has been closed.
 * After completing TT, you may reenter it through the shortcut path using CUT instead of crossing through the maze of water bridges again.
 * Once you have beaten TT, a nearby cave will be accessible for you to pass through to reenter Tanren again. This way you will not have to complete Tanren Tunnel again.
 * Even with the HM Fly if one has not beaten TT, they will not be able to descend the hill with the updraft.