Nestled deep beneath a mountain, these mines are a haven for Rock-types. Regions within the mines are known to amplify sounds and carry them everywhere. Due to the shifting of the earth above, either from mining or seismic activity, sand and rocks constantly fall down. The mines are not spacious. It is very cramped under the mountain. Because this a mine under a mountain, there is no grass source. Not enough sunlight down here to nurture and type of plant. There is also no clean water source. All the water brought into the mine comes from the outside, and only enough to hydrate the miners. The little water naturally found down here is dirty with oil and sand. It is fairly dark in the mine. Only a few lanterns can be found.
-Sandstorm is treated as being active, minus the damaging effect. (This means Sand Veil, Sand Force, and Sand Rush are all triggered, and Special Attacks are reduced by 2 BAP against Rock-Types).
-Rock-Type moves gain 10% accuracy, due to the tight quarters.
-Nature Power is treated as Rock Slide
-There is a 15% chance the user will flinch if they use Avalanche, Bulldoze, Dig, Earthquake, or Magnitude. These moves have the potential to cause a cave-in and doom everyone.
-Drill moves gain a 30% chance to flinch, due to the rocks from above falling down.
-Rock Wrecker's BAP is lowered by 2 and EN is raised by 1, but the user does not become sluggish. This is due to the user taking care not to cause a cave-in and doom them all.
-SolarBeam's BAP is halved, unless its user expends 16 EN.
-Grass and Water-Type moves are decreased by 2 BAP, excluding SolarBeam, due to the lack of water and grass in the mine.
-Pokemon with the ability "Magnet Pull" have permanent Levitation, due to the metalic ores in the mine.
-Leech Seed, Ingrain, and Aqua Ring heal/Leech once every round instead of every action, due to the lack of clean water and sunlight in the mine.
-Snow Warning, Hail, Drizzle, Rain Dance, Drought, and Sunny Day have no effect, due to the mine being underground.
-Rock Polish can be used as a +1 Priority evasive attack. Rock Polish will evade any slower single target attack (other than perfect accuracy attacks and No Guard attacks). If used evasively, the Pokemon does not gain any speed boost. Evasive Rock Polish also fails if used after or before Protect, Detect, Evasive Teleport, Evasive Agility, or the Dodge Command or if used successively. If Evasive Rock Polish is combined with a suitable damaging move, the evasive properties granted by Evasive Rock Polish are nullified.