Underground

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The Underground ちかつうろ
Underground Passage
"Wild Missingno. appeared!"
File:Sinnoh Underground Map.png
Map description: {{{mapdesc}}}
Location: Beneath Sinnoh
Region: Sinnoh
Generations: IV
Sinnoh.png
Location of The Underground in Sinnoh.
Pokémon world locations

The Underground (Japanese: ちかつうろ Underground Passage) is an area in Pokémon Diamond, Pearl, and Platinum found beneath the entire Sinnoh region. Players can travel underground at any time using an Explorer Kit, which they can receive from the Underground Man in Eterna City. The Underground features multiple uses of the DS's touch-screen, as the main view is on the lower touch-sensitive screen while the upper screen shows a radar map of the entire underground. It also utilizes DS Wireless Communication to allow multiple players, each with their own DS and copy of the game, to interact.

The Underground has a different menu from the one in the overworld. Mostly, it shows the different items used; with the exception of treasures, which can be transferred to the player's Bag, these are all exclusive to the area.

Spheres are the currency of the underground. The player can bury their spheres to make them more valuable, either by leaving a sphere buried for a long time to make it grow, or by burying spheres of the same color in the same spot to merge them into a larger sphere. When spheres are buried in the same spot, their sizes are mixed together. When two or more spheres are buried on top of each other, the largest sphere is added to the smaller spheres' sizes divided by five, rounded down, plus one. Spheres can reach a maximum size of 99, with some growing faster than others. Blue, green, and red spheres grow the fastest, and are thus the least valuable. Pale spheres are the second fastest growing spheres, and are semi-valuable. Prism spheres are the slowest growing spheres, and are thereby the most valuable of all the sphere types. Burying spheres can increase the number and density of mining sparkles in the same vicinity.

There are six different areas in the Underground; each is accessible from different overworld locations. While some are readily accessible from the mainland, players must sometimes travel to far-off places like Fullmoon Island to enter these areas.

Features

Exploring

Lucas digs for treasure, while Dawn sets up traps in the Underground.

As in the regular world, using the D-pad lets the player walk in any direction and holding "B" allows running. As the regular Bag is not able to be used in the Underground, the Bike is not available to increase speed further. Steps taken in the Underground do not count towards hatching Eggs, but time spent counts towards the overall game timer. The game cannot be paused (by closing the DS lid or otherwise) while in the Underground. Additionally, since the wireless features consume more power than usual operation, the player should be careful not to drain the battery completely while in the Underground.

There are six independent sections of the labyrinth, each accessible from different places in Sinnoh. In terms of vendors and mining treasures, the areas are equivalent. When participating in multiplayer action in the Underground, players should make sure they are all in the same set of caverns.

The vast majority of the tunnels are 5 squares wide, with some single-square-width passageways between parallel tunnels. The player can see roughly 12x15 squares on the screen at any given time (not accounting for side effects of the top-down perspective). By touching any area of the lower touch screen, a radar pulse indicates interactive objects within a 4-5 square radius, indicated by yellow sparkles. There appears to be a maximum of 8-10 sparkles that will display if a particular ping returns too many objects.

If a sparkle revealed by a ping is located on the floor of the tunnel, it is either a trap or a sphere. A difference in whether a sphere or trap is hidden in the sparkle, a trap has a white sparkle while a sphere has a golden one. If both are hidden in one spot, a trap is found first, then a sphere. If the sparkle is in the wall, it is a bulging section that can be mined.

Mining

File:Grebespiel.png
Mining for treasure using the hammer

One of the main attractions of the Underground is the mining minigame. To mine, the player must find a spot where the wall 'pings' by touching the screen and looking for sparkles. These spots will appear randomly in the Underground, usually in clusters, and can be located by looking for sparkles marked on the radar screen. They appear more frequently near buried spheres, and so one way players can ensure they always have a lot of mining spots available to them is to make a "sphere garden" by burying many spheres in the same area.

The game itself is similar to Battleship or Minesweeper. At the start, the cave wall is shown, represented by a grid full of squares. There are three depths of wall: the tan soil, which can be broken through in one hit, the darker soil, which needs two hits to be broken through, and the large rocks, which each need three hits to be broken through. The player digs into the wall with a pick, which chips away small areas of rock, and a hammer, which breaks a larger area of the rock. Each spot will hide one to four items, including spheres, Fossils, Revives, Heart Scales, shards, evolutionary stones, Plates, and a few held items. Iron pieces are also in the wall, which cannot be dug out and prevent further mining upon discovery (that is, when they are uncovered on a direct hit, no other spaces are revealed until the next hit). Upon hitting a piece of iron a small 'ping' will be heard. Each hit will bring the wall closer to collapsing; if the wall collapses before everything is dug up, the game ends and the player is rewarded with what they dug up before the wall collapsed.

In addition, if anyone else is mining nearby, a pickaxe will appear on the player's screen wherever the other player hits on their screen. This helps clear the wall without contributing to the wall's collapse.

At first, only Skull or Armor Fossils can be found depending on the game version. After obtaining the National Pokédex, however, the game will also yield Helix Fossils, Dome Fossils, Old Ambers, Root Fossils, and Claw Fossils.

Burying spheres

Burying spheres is done through the Underground's menu function. It will not work, however, when the player faces a wall: spheres can only be buried in the ground. The longer the spheres remain buried, the larger they will grow. In the player's presence, their buried sphere will occasionally let off a bright glint. Buried spheres are only accessible to the player that put them there; others cannot see them, ping them, or interact with them in any way. Others can, however, take advantage of the increased mining spots generated. This can be beneficial for the player who buried the spheres and a friend (or friends), as there will be plenty of opportunities to mine side-by-side.

Item shapes

Items have unique shapes in the mining minigame. Larger items cover a greater area and can thus be found more easily, but take more digging to unearth.

* Can be found this way and rotated 90°
** Can be found this way, rotated 90°, rotated 180°, and rotated 270°

Small Sphere

Large Sphere

Heart Scale

Skull Fossil

Armor Fossil

Dome Fossil

Helix Fossil**

Old Amber*

Claw Fossil**

Root Fossil**

Red Shard

Yellow Shard

Green Shard

Blue Shard

Plate

Hard Stone

Heat Rock

Damp Rock

Smooth Rock

Icy Rock

Fire Stone

Water Stone

Thunderstone

Leaf Stone*

Moon Stone*

Sun Stone

Oval Stone

Everstone

Iron Ball

Light Clay

Odd Keystone

Revive

Max Revive

Star Piece

Rare Bone*

Secret Bases

The Underground is also where secret bases are created in the Generation IV games. The spheres dug up in the mining minigame can be traded to explorers found throughout the caves for objects to furnish secret bases. Secret bases can be created in any part of the wall using a Digger Drill. These bases can be decorated with ten items each.

If a player visits a secret base of another player, they can get that player's flag. After successfully returning the other player's flag to one's own base, the player's record is updated. The number of flags captured (either from the same "opponent" or several ones) upgrades the player's secret base computer. Each upgrade changes the graphic slightly (the icons resemble the evolution of personal computer technology) and also allows the player to remove additional boulders from their base using the "Store" option of the "Decorate" menu. This allows more room for decorations to be placed. Boulders that have been removed cannot be placed back into the base, although they'll reappear if a new base is created.

No. of flags Reward
No. of flags Reward
1 Bronze flag with the ability to remove three boulders.
3 Silver flag with the ability to remove two more boulders.
10 Gold flag with the ability to remove five more boulders, and a radar that shows the locations

of treasure, buried spheres and traps for the whole underground map.

50 Platinum flag with the ability to remove all boulders and a star on the Trainer Card.


A player who has a flag cannot do anything besides store the flag in their PC. If they try, the game will alert them that they have to drop their flag first. If the owner of the flag talks to someone who has stolen it, the flag is automatically returned to their base, while if another player talks to someone who has stolen a flag, that person steals the flag from the other person, and then they can try to get the flag to their base.

Traps

Another feature of the underground is traps. These can also be purchased from explorers with spheres or found in the path in the same manner that the player can find mining spots: by touching the screen and watching for sparkles on the ground. They may also be dug up, like the Spheres, by pressing the A button when next to one, facing it. Players may only carry a total of 40 traps at one time; an attempt to unearth a 41st trap will be refused and the trap left where it is. If a player steps on a trap, they may be sent flying in a specific direction, have their controls altered so they walk the wrong way, or they may have to use the stylus or microphone to clear a hazard, such as by popping bubbles or clearing smoke, or a message will be broadcast to all players in the Underground. The game will explain how to escape from a trap, however if the trap was placed by an opponent, he or she will be alerted that someone has landed in it. If one player is caught in a trap, another can face them and press A to immediately get them out of it. Since all players run at the same speed, well placed traps are the primary means of catching up to someone who has stolen a player's flag. If a player has set some of his/her own traps they will show up as brightly colored squares with symbols matching their names. This helps the player as to not get caught in her/his own traps.

Vendors

A crucial feature of the underground is vendors. These explorers appear to be stationary and only rotate in place. There are three types of vendors in the underground. The first group of vendors are those who accept the player's treasures and give them spheres in return. The second group of vendors are those who accept spheres and give goods in return, and vice versa. The last group of vendors are those who accept spheres and give traps in return, and vice versa. Vendors change their prices on items and which items they sell every day, so one vendor may not have the same item for two days in a row. Vendors allow the player to decorate their secret base and plant traps anywhere in the underground. In the map of the underground at the top of the page, the yellow dots are the trap vendors, the red dots are the treasure vendors, and the blue dots are the goods vendors.

Multiplayer

When entering the Underground, the DS Wireless Communication is activated. Other players within range choosing to enter the Underground will be able to interact in the same set of tunnels. As described above, players can enter one another's Secret Bases and set traps. Additionally, digging in the walls next to each other allows players to collaborate on the excavation.

Players can talk to each other just like NPCs in the above world. In doing so, they can exchange Goods used to decorate a Secret Base, and they can communicate using a basic question and answer selection menu. Each time a player talks to another player, the counter on their card is incremented. This counter reaching 32 is one of the prerequisites for encountering Spiritomb.

Item appearances

Mine Red Shard.png Mine Blue Shard.png Mine Green Shard.png Mine Yellow Shard.png
Red Shard Blue Shard Green Shard Yellow Shard
Mine Helix Fossil 1.png Mine Dome Fossil.png Mine Old Amber 1.png Mine Root Fossil 4.png
Helix Fossil Dome Fossil Old Amber Root Fossil
Mine Claw Fossil 3.png Mine Armor Fossil.png Mine Skull Fossil.png Mine Rare Bone 2.png
Claw Fossil Armor Fossil Skull Fossil Rare Bone
Mine Star Piece.png Mine Revive.png Mine Max Revive.png Mine Iron Ball.png
Star Piece Revive Max Revive Iron Ball
Mine Heart Scale.png Mine Light Clay.png Mine Odd Keystone.png Mine Hard Stone.png
Heart Scale Light Clay Odd Keystone Hard Stone
Mine Fire Stone.png Mine Water Stone.png File:Mine Thunderstone.png Mine Leaf Stone 1.png
Fire Stone Water Stone Thunderstone Leaf Stone
Mine Moon Stone 1.png Mine Sun Stone.png Mine Oval Stone.png Mine Everstone.png
Moon Stone Sun Stone Oval Stone Everstone
Mine Smooth Rock.png Mine Heat Rock.png Mine Icy Rock.png Mine Damp Rock.png
Smooth Rock Heat Rock Icy Rock Damp Rock
Mine Draco Plate.png Mine Dread Plate.png Mine Earth Plate.png Mine Fist Plate.png
Draco Plate Dread Plate Earth Plate Fist Plate
Mine Flame Plate.png Mine Icicle Plate.png Mine Insect Plate.png Mine Iron Plate.png
Flame Plate Icicle Plate Insect Plate Iron Plate
Mine Meadow Plate.png Mine Mind Plate.png Mine Sky Plate.png Mine Splash Plate.png
Meadow Plate Mind Plate Sky Plate Splash Plate
Mine Spooky Plate.png Mine Stone Plate.png Mine Toxic Plate.png Mine Zap Plate.png
Spooky Plate Stone Plate Toxic Plate Zap Plate

In the anime

The Underground tunnels in the anime.

The Underground appeared in The Grass Menagerie!. While Ash was battling Gardenia for the Forest Badge, Team Rocket stumbled across the sprawling tunnels of the Underground. They met the Underground Man, who convinced them to dig in the tunnels for Shards and Spheres. They agreed to split the profits with him in exchange for lunch. However, he fled with the treasure while they ate—not that they cared; the trio were happy to have some food.

Trivia

  • The background music in the Underground is a remix of the music played in the desert of Route 111 in Hoenn.
  • Air vents that serve to provide the Underground with a supply of air can be found all over the surface of Sinnoh.
  • Walking into a wall will not cause the 'bump' audio to play.
  • The Underground has rotational symmetry.
  • The player's PC is only updated when the door is shut; if it is open then the PC reverts to the very first look.

In other languages

Language Title
French Canada Flag.png Canada Souterrain
France Flag.png Europe Souterrain
Germany Flag.png German Untergrund
Italy Flag.png Italian Sotterranei
Spanish CELAC Flag.png Latin America Subsuelo
Spain Flag.png Spain Subsuelo


Sinnoh
Coal Badge.png Forest Badge.png Cobble Badge.png Fen Badge.png Relic Badge.png Mine Badge.png Icicle Badge.png Beacon Badge.png
Settlements
Twinleaf TownSandgem TownJubilife CityOreburgh CityFloaroma TownEterna CityHearthome City
Solaceon TownVeilstone CityPastoria CityCelestic TownCanalave CitySnowpoint CitySunyshore City
Pokémon LeagueFight AreaSurvival AreaResort Area
Routes
201202203204205206207208209210211212213214215
216217218219220221222223224225226227228229230
Landmarks
Lake Verity (Lakefront) • Oreburgh GateOreburgh MineOreburgh Mining MuseumGlobal Terminal/Global Wonder Station
Ravaged PathFloaroma MeadowValley WindworksEterna ForestOld ChateauUnderground/Grand Underground
Wayward CaveMount CoronetAmity SquareLost TowerHallowed TowerSolaceon RuinsManiac TunnelLake Valor (Lakefront)
Great MarshPokémon MansionTrophy GardenFuego IronworksIron IslandLake Acuity (Lakefront) • Spear PillarVictory Road
Pal Park/Ramanas ParkContest HallBattle ZoneBattle ParkBattle Tower/Battle FrontierStark MountainSnowpoint Temple
Spring PathSendoff SpringTurnback CaveFullmoon IslandNewmoon IslandSeabreak PathFlower ParadiseHall of Origin
Access to
Distortion World
See also
Hisui


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