Marine Tube

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Marine Tube マリンチューブ
Marine Tube
"Wild Missingno. appeared!"
Marine Tube B2W2.png
Map description: An undersea tunnel built using cutting-edge technology.
Location: Between Undella Town and Humilau City
Region: Unova
Generations: V
Unova Marine Tube Map.png
Location of Marine Tube in Unova.
Pokémon world locations

The Marine Tube (Japanese: マリンチューブ Marine Tube) is an underwater location in Unova introduced in Pokémon Black and White 2. It is a tube that connects Undella Town with Humilau City under Undella Bay.

Marine Tube Ahead
The Walk-Through Aquarium


Known as "the walk-through aquarium", the Marine Tube was built during the two years between Pokémon Black and White and their sequels. It was constructed to commemorate the friendship between Undella Town and Humilau City and was designed, as stated by an NPC, "to see, not to move." When the player first arrives in Undella Town, the Marine Tube is closed for cleaning and yet to open. The cleaning is completed at the same time the player earns his or her seventh badge.

The Marine Tube is a transparent tube made of 9.8 inch glass built to withstand high water pressures and contact with huge Pokémon. The tunnel was made above ground and lowered into the water. Crossing a six-mile-deep ocean trench, the Marine Tube is one of the many pinnacles of technology in the Unova region.

Plating corals and pyramid-like rocks can be seen in the water surrounding the tube. Lights have been placed outside the tube to provide visibility. There is a canyon halfway along the tube's route, the bottom of which cannot be seen. The Water-type Pokémon Alomomola, Basculin, Frillish, Mantine, and Wailord can be observed outside, represented with animations exclusive to this purpose. Some of these Pokémon will only appear at certain times of the day; the player can get the Wailord Watcher Medal by spotting an elusive Wailord, which are common between 3:00 PM and 5:00 PM (going by the time the player entered the Marine Tube).

There are no wild Pokémon or Trainers to battle in the Marine Tube. There are no items lying around, although the self-proclaimed first fan of Roxie will give the player a Black Sludge if they show her a Pokémon holding a Poison Barb.

If the player has given a man in an orange shirt a Fresh Water at Skyarrow Bridge, Driftveil Drawbridge, Tubeline Bridge, Village Bridge, and Marvelous Bridge, then they will meet up with the same man here. Should the player give him another Fresh Water, then he will become rehydrated and dash back to the Skyarrow Bridge with some gifts for the player.


Item Location Games
Bag Black Sludge Sprite.png Black Sludge From a female Ace Trainer after showing her a Pokémon holding a Poison Barb  B2  W2 

Observable Pokémon

Pokémon Hours
Mantine Mantine 9:00 AM - 2:59 PM
Wailord Wailord 3:00 PM - 4:59 PM
Basculin Basculin 12:00 AM - 2:59 PM and 5:00 PM - 11:59 PM
Frillish Frillish 12:00 AM - 5:59 AM and 5:00 PM - 11:59 PM
Alomomola Alomomola 6:00 AM - 8:59 AM

In the TCG

This listing is of cards mentioning or featuring the Marine Tube in the Pokémon Trading Card Game.

Related cards
Cards listed with a blue background are only legal to use in the current Expanded format.
Cards listed with a silver background are legal to use in both the current Standard and Expanded formats.
Card Type English
Rarity # Japanese
Rarity #
Jellicent Water Boundaries Crossed Rare 45/149 Freeze Bolt U 022/059

In other languages

Language Title
France Flag.png European French Aquatube
Germany Flag.png German Unterseetunnel
Italy Flag.png Italian Tunnel Marino
South Korea Flag.png Korean 마린튜브 Marine Tube
Spain Flag.png European Spanish Acuatúnel

Trio Badge.png Basic Badge.png Insect Badge.png Bolt Badge.png Quake Badge.png Jet Badge.png Freeze Badge.png Legend Badge.png
Basic Badge.png Toxic Badge.png Insect Badge.png Bolt Badge.png Quake Badge.png Jet Badge.png Legend Badge.png Wave Badge.png
Nuvema TownAccumula TownStriaton CityNacrene CityCastelia CityNimbasa CityAnville Town
Driftveil CityMistralton CityIcirrus CityOpelucid CityPokémon LeagueLacunosa TownUndella Town
Black CityWhite ForestAspertia CityFloccesy TownVirbank CityLentimas TownHumilau City
Bridges and tunnels
Skyarrow BridgeDriftveil DrawbridgeTubeline BridgeVillage BridgeMarvelous BridgeMarine Tube
DreamyardWellspring CavePinwheel ForestLiberty GardenDesert ResortRelic CastleBattle SubwayLostlorn Forest
Cold StorageMistralton CaveChargestone CaveCelestial TowerTwist MountainDragonspiral TowerMoor of Icirrus
Challenger's CaveVictory Road (BWB2W2) • N's CastleRoyal UnovaGiant ChasmUndella BayAbyssal Ruins
Abundant ShrinePoké Transfer LabP2 LaboratoryEntralinkUnity TowerFloccesy RanchPledge GroveVirbank Complex
Pokéstar StudiosCastelia SewersJoin AvenueCave of BeingPokémon World TournamentReversal MountainPlasma Frigate
Clay TunnelUnderground RuinsStrange HouseRelic PassageSeaside CaveWhite TreehollowBlack Tower
Access to
Nature Preserve

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