Sea Mauville
TrainersPokemon
South Exit: Route 108

Sea Mauville used to be a large scientific research platform off of Route 108 which used to be staffed by Captain Stern and Professor Cozmo's father, among many others. It closed down following the failure of the New Mauville project and ended up being dilapidated, with half of it sinking underwater. Many trainers use the area now to train or be hidden away.

Flyable to?: Yes

Special Moves used in Sea Mauville:
Surf
Dive

Sea Mauville
Area Anchors
OutsideHallwayUnderwaterBasementRoom 1
Room 2Room 3Room 4Room 5Room 6
Storage

Outside

Wild Pokémon

AnchorsSurfingOld RodGood RodSuper Rod
Interaction
Standard Surfing
Pokémon Omega Ruby
TentacoolWingullPelipper
Common%Uncommon%Rare%
LevelLevelLevel
20 - 2520 - 2025 - 30
Pokémon Alpha Sapphire
TentacoolWingullPelipper
Common%Uncommon%Rare%
LevelLevelLevel
20 - 2520 - 2025 - 30
Fishing - Old Rod
Pokémon Omega Ruby
MagikarpTentacool
65%35%
LevelLevel
10 - 155 - 5
Pokémon Alpha Sapphire
MagikarpTentacool
65%35%
LevelLevel
10 - 155 - 5
Fishing - Good Rod
Pokémon Omega Ruby
MagikarpTentacoolWailmer
60%35%5%
LevelLevelLevel
25 - 2525 - 2525 - 25
Pokémon Alpha Sapphire
MagikarpTentacoolWailmer
60%35%5%
LevelLevelLevel
25 - 2525 - 2525 - 25
Fishing - Super Rod
Pokémon Omega Ruby
Wailmer
100%
Level
30 - 40
Pokémon Alpha Sapphire
Wailmer
100%
Level
30 - 40
Interactable Pokémon
Pokémon Omega Ruby
Ho-Oh
-%
Level
50 - 50

Trainers

Sailor Duncan WailmerMachoke
Battle Type
Single Battle
Items
Level 26Level 28


Hold Item:
No Item
Hold Item:
No Item
Tuber Charlie Corphish
Battle Type
Single Battle
Items
Level 28

Hold Item:
No Item

Items

PictureItemMethod
Escape RopeOn the bough next to Scientist
  TM18On the stairs beyond the scientist
Key to Room 4Speak to Fisherman on other side of facility - Requires Dive

Hallway

Wild Pokémon

AnchorsSurfingOld RodGood RodSuper Rod
Standard Surfing
Pokémon Omega Ruby
TentacoolWingullPelipper
Common%Uncommon%Rare%
LevelLevelLevel
20 - 2520 - 2025 - 30
Pokémon Alpha Sapphire
TentacoolWingullPelipper
Common%Uncommon%Rare%
LevelLevelLevel
20 - 2520 - 2025 - 30
Fishing - Old Rod
Pokémon Omega Ruby
MagikarpTentacool
65%35%
LevelLevel
10 - 155 - 5
Pokémon Alpha Sapphire
MagikarpTentacool
65%35%
LevelLevel
10 - 155 - 5
Fishing - Good Rod
Pokémon Omega Ruby
MagikarpTentacoolWailmer
60%35%5%
LevelLevelLevel
25 - 2525 - 2525 - 25
Pokémon Alpha Sapphire
MagikarpTentacoolWailmer
60%35%5%
LevelLevelLevel
25 - 2525 - 2525 - 25
Fishing - Super Rod
Pokémon Omega Ruby
Wailmer
100%
Level
30 - 40
Pokémon Alpha Sapphire
Wailmer
100%
Level
30 - 40

Items

PictureItemMethod
Max RepelBy the water
Key to Room 1From Tuber on north right - Requires Surf & Dive
White HerbBeyond Tubers - Requires Dive

Underwater

Basement

Wild Pokémon

AnchorsInteraction
Interactable Pokémon
Pokémon Alpha Sapphire
Lugia
-%
Level
50 - 50

Items

PictureItemMethod
Hidden in ground - Requires Dive

Room 1

Trainers

Mysterious Sisters Scall & Ion ChinglingKirlia
Battle Type
Double Battle
Items
Level 29Level 28


Hold Item:
No Item
Hold Item:
No Item
Rematch
Mysterious Sisters Scall & Ion ChinglingGardevoir
Battle Type
Double Battle
Items
Level 34Level 33


Hold Item:
No Item
Hold Item:
No Item
Rematch
Mysterious Sisters Scall & Ion ChimechoGardevoir
Battle Type
Double Battle
Items
Level 41Level 40


Hold Item:
No Item
Hold Item:
No Item
Rematch
Mysterious Sisters Scall & Ion ChimechoGardevoir
Battle Type
Double Battle
Items
Level 45Level 44


Hold Item:
No Item
Hold Item:
No Item
Rematch
Mysterious Sisters Scall & Ion ChimechoGardevoir
Battle Type
Double Battle
Items
Level 51Level 50


Hold Item:
No Item
Hold Item:
No Item
Rematch

Items

PictureItemMethod
Dive BallIn the middle of the room
Key to Room 2In the locker on the left hand side
Dawn StonePossible gift when you defeat Mysterious Sisters Scall & Ion in a rematch Dawn Stone

Room 2

Items

PictureItemMethod
ReviveNext to couple
Key to Room 6Gift from girl

Room 3

Trainers

Young Couple Lois & Hal IllumiseVolbeat
Battle Type
Double Battle
Items
Level 29Level 29


Hold Item:
No Item
Hold Item:
No Item
Rematch
Young Couple Lois & Hal IllumiseVolbeat
Battle Type
Double Battle
Items
Level 34Level 34


Hold Item:
No Item
Hold Item:
No Item
Rematch
Young Couple Lois & Hal IllumiseVolbeat
Battle Type
Double Battle
Items
Level 41Level 41


Hold Item:
No Item
Hold Item:
No Item
Rematch
Young Couple Lois & Hal IllumiseVolbeat
Battle Type
Double Battle
Items
Level 45Level 45


Hold Item:
No Item
Hold Item:
No Item
Rematch
Young Couple Lois & Hal IllumiseVolbeat
Battle Type
Double Battle
Items
Level 51Level 51


Hold Item:
No Item
Hold Item:
No Item
Rematch

Items

PictureItemMethod
Destiny KnotPossible gift when you defeat Young Couple Lois & Hal in a rematch Destiny Knot

Room 4

Wild Pokémon

AnchorsInteraction
Interactable Pokémon
Pokémon Omega Ruby
Spiritomb
-%
Level
50 - 50
Pokémon Alpha Sapphire
Spiritomb
-%
Level
50 - 50

Items

PictureItemMethod
Storage KeyBottom left of Room 4

Room 5

Room 6

Storage

Items

PictureItemMethod
Big NuggetOn ground - Eight
  TM13On ground
NuggetOn ground - Four
Luxury BallOn ground
BeedrilliteBottom left