Tanren Mines

Tanren Mines, shortened to Mines by players, is mainly Rock- and Ground-type. The dungeon has 42 floors with two rest points; one on floor 15 and another on floor 29. This dungeon supplies HM Rock Climb. Tanren Mines is a dungeon for levels 50 to 65. It is one of the only dungeons to have TM Earthquake (alongside Seafloor Ruins). It is also the only place to find Trapinch and Hippopotas.

Floors 1-7
The beginning floors have a red colored wall. Water is common and in large quantities, while the ground is grey gravel. There is a darkness that begins at Floor 7. The rooms are medium in size and the hallways are normal size.

Floors 11-14
The scenery is mostly the same as the scenery from the previous floors. The only difference is that the walls are grey instead of red. Water is still common but there is a smaller amount.

Tanren Mines Quarry
It features a large amount of different warps all leading to a dead end, full of 16 Zubats. Only one warp leads to the correct ending and allows you to move on. The location of the correct warp is behind your spawn.

Floors 15-24
The scenery is the same as the previous floors but now the ground is brown. The weather Sandstorm is uncommon.

Floors 25-28
The scenery is the same as the previous floors however the ground changes to a pale sand-like texture. There is also no water around and the weather Sandstorm is common. The rooms are smaller and the hallways have become larger and more complex.

Tanren Mines Vestibule
After facing the Nidoking and Nidoqueen, there are several quicksand warps further In the same room. When taken the right one, you'll be warped Into a room containing a single Rock Climb HM. At the bottom-right of the room Is a warp that exits the dungeon, going to the wall brings you to the Arid Cavern.

Arid Cavern
Here, is a break point and maze with a Kangaskhan statue. The objective of here to get across the map using the newly obtained Rock Climb and going through various warps disguised as quicksand.

Floors 29-34
The scenery is the same as the previous floor, however the walls become a brown color. The rooms are small and the hallways are long and even more complex.

Floors 35-42
There is a large change from the previous floors. The rooms have become large and there is water. The water is common and in large quantities. The hallways are complex and long.

Nidoking and Nidoqueen
These two are found after Floor 28. The two Pokémon try to break down a wall, but then, they quickly mistake the player as an enemy and attack. After defeat, Nidoking apologizes to Nidoqueen for failing, but then they realize that the player is friendly after Nidoqueen points out how blind they were, and Nidoking and Nidoqueen ask the player to rescue some miners while Nidoking explains about the monster that Nidoking and Nidoqueen mistook the player for. After a while, Nidoqueen praises the player before a pathway is revealed. Nidoqueen wishes the player good luck before walking off with Nidoking.

Boss Drop:
 * Black Sludge (Nidoqueen)
 * 2 Tiny Mushroom

Regirock
The player approaches some ancient ruin, but shortly afterwards, Regirock appears and attacks the player, believing them to be an intruder. After defeat, the player and Regirock return to the same places before the battle began, and then Regirock stops to search for a pattern in the player's memory, and it finds a match. It turns out that the three intruders (later revealed to be a Swellow, Electrode, and Lampent) were "terminated". Afterwards, Regirock returns to its base.

Boss Drop:
 * Rock Diamond
 * Tiny Mushroom
 * Regirock's Heart Slate

End Box
Once the dungeon is completed, the three miners find out that the player defeated Regirock and thank the player. In the room, there is a Deluxe Box that is found the list of the possible items are as follows:
 * Ground Dust
 * Rock Dust
 * Dawn Stone
 * Shiny Stone
 * Escape Rope
 * Revive
 * TM Telekinesis
 * TM Dig
 * TM Earthquake
 * TM Giga Impact
 * TM Stone Edge

Secret Room
Secret rooms were previously invisible upon stepping on them, so not much is known about them. One did appear on BF16. There are a few different types of Secret Rooms. Each listed below:

One which has 1 Big Apple and 2 Deluxe Boxes. In these Deluxe Boxes for THIS Secret Room contains:
 * Diamonds (Rock, Fighting, Bug, Poison, Grass, Poison,...)
 * Shiny Stone
 * Thunder Stone
 * Escape Rope

Pokémon
''Pokémon in bold are recruitable. Please visit the Recruitable Pokémon page for more information.''

Items
This dungeon has the standard items required for exploration, including Apples and Ethers. It also has various tutor items. All items maybe sticky.

Dungeon Objective
This dungeon offers one HM Rock Climb in between, right after the mini-boss, for use later on in the dungeon. This is one of the only dungeons that has TM Earthquake. Furthermore, Tanren Mines is home to two dungeon-exclusive recruitable Pokémon: Hippopotas and Trapinch.

The player goes up against Nidoking and Nidoqueen near the middle and Regirock in the end.

Regirock has a chance of dropping its Heart Slate. If the player combines Regirock's Heart Slate with the Mystery Part, Regirock can be summoned at any time in a dungeon.

Trivia

 * This dungeon was one of the first to featured on the Official PMU Tumblr page.
 * Regirock speaks in Morse Code. What it is saying is:
 * Intruder/Detected
 * Exterminate
 * No/Mercy
 * One/Moment/Release
 * Good/Bye
 * The Pokémon, Nidoking and Nidoqueen, are searching for the miners that are lost inside.
 * Sadly, Regirock "terminated" the miners, unbeknownst to them.
 * The Quarry is similar to 'Lost Woods' from the Legend of Zelda series.
 * When this dungeon was released the location of the correct warp changed every few days.
 * The dungeon shares its initials, TM, with Tanren Mansion, as well as the Technical Machine items. As the three can be confused, its usually frowned upon to refer to either of the dungeons as TM.