Hoenn field journalPokémon Ruby / SapphireGUIDES

Seafloor Cavern Ruby & Sapphire · Dungeon

Map of Seafloor Cavern in Pokémon Ruby and Sapphire
Seafloor Cavern room 1 (in-game map)

Seafloor Cavern is the ancient cave under the sea of Route 128 where Groudon (Ruby) or Kyogre (Sapphire) sleeps. After the Mind Badge, you Dive down, find Captain Stern's stolen submarine, and work through boulder and rock puzzles to the deepest room. Maxie or Archie awakens the Pokémon with the stolen orb, it escapes, and the extreme weather sends you on to Sootopolis City.

Wild Pokémon
5
Items
1
Trainers
10
HMs
Dive (to reach the cavern from Route 128), Surf, Strength (boulder puzzles), Rock Smash (rocks blocking the way)

Connects to: Route 128

Where Seafloor Cavern is on the Hoenn mapSeafloor Cavern on the Hoenn map

Wild Pokémon

Entrance

Surfing encounter rate 4
PokémonTypeLv.RubySapphire
TentacoolWaterPoison5–3560%60%
ZubatPoisonFlying5–3535%35%
GolbatPoisonFlying30–355%5%
Fishing
RodPokémonLv.RubySapphire
Old RodMagikarp5–1070%70%
Tentacool5–1030%30%
Good RodMagikarp10–3060%60%
Tentacool10–3020%20%
Wailmer10–3020%20%
Super RodWailmer20–45100%100%

Room 1, Room 2, Room 3, Room 4, Room 5, Room 8

Walking in the cave encounter rate 4
PokémonTypeLv.RubySapphire
ZubatPoisonFlying28–3590%90%
GolbatPoisonFlying33–3610%10%

Room 6, Room 7

Walking in the cave encounter rate 4
PokémonTypeLv.RubySapphire
ZubatPoisonFlying28–3590%90%
GolbatPoisonFlying33–3610%10%
Surfing encounter rate 4
PokémonTypeLv.RubySapphire
TentacoolWaterPoison5–3560%60%
ZubatPoisonFlying5–3535%35%
GolbatPoisonFlying30–355%5%
Fishing
RodPokémonLv.RubySapphire
Old RodMagikarp5–1070%70%
Tentacool5–1030%30%
Good RodMagikarp10–3060%60%
Tentacool10–3020%20%
Wailmer10–3020%20%
Super RodWailmer20–45100%100%

Chances are the game’s encounter slots for each version (grass 20/20/10/10/10/10/5/5/4/4/1/1, surfing, diving and Rock Smash 60/30/5/4/1, Old Rod 70/30, Good Rod 60/20/20, Super Rod 40/40/15/4/1). A dash means the Pokémon does not appear in that version here. Version exclusives · Where to find every Pokémon.

Trainers

Magma Leader Maxie

Magma Leader Maxie Ruby Room 9

MightyenaMightyena 41CrobatCrobat 41CameruptCamerupt 43

Prize ¥3,440

Aqua Leader Archie

Aqua Leader Archie Sapphire Room 9

MightyenaMightyena 41CrobatCrobat 41SharpedoSharpedo 43

Prize ¥3,440

TrainerPokémonPrizeWhere
Team Magma Grunt RubyPoochyenaPoochyena 37NumelNumel 37¥740Room 1
Team Aqua Grunt SapphirePoochyenaPoochyena 37CarvanhaCarvanha 37¥740Room 1
Team Magma Grunt RubyNumelNumel 38¥760Room 1
Team Aqua Grunt SapphireCarvanhaCarvanha 38¥760Room 1
Magma Admin RubyCourtneyCameruptCamerupt 38MightyenaMightyena 38¥1,520Room 3
Aqua Admin SapphireShellySharpedoSharpedo 38MightyenaMightyena 38¥1,520Room 3
Team Magma Grunt RubyPoochyenaPoochyena 36ZubatZubat 36NumelNumel 36¥720Room 4
Team Aqua Grunt SapphirePoochyenaPoochyena 36ZubatZubat 36CarvanhaCarvanha 36¥720Room 4

Prize money is four times the level of the trainer’s last Pokémon times the trainer class’s base rate (doubled in double battles). Trainers with rematches show up again as ready to battle in the PokéNav’s Trainer’s Eyes.

Items

ItemHow
TM26 EarthquakeItem ball

Hidden items can be found with the Itemfinder.

Tips

  • TM26 Earthquake is in the deepest room, right before the final confrontation. It needs Strength to reach.
  • Ruby: Magma Admin Courtney (Camerupt, Mightyena, Lv. 38). Sapphire: Aqua Admin Shelly (Sharpedo, Mightyena, Lv. 38).
  • The leader uses Mightyena and Crobat at Lv. 41 plus a Lv. 43 Camerupt (Maxie) or Sharpedo (Archie).
  • Inside, the walking encounters are 90% Zubat and 10% Golbat, so a Repel saves a lot of time.
  • If you get a boulder puzzle wrong, leave the room and come back in to reset it.

Walkthrough: Part 12: Dive and the Seafloor Cavern

More maps

Seafloor Cavern: Seafloor Cavern room 2
Seafloor Cavern room 2
Seafloor Cavern: Seafloor Cavern room 3
Seafloor Cavern room 3
Seafloor Cavern: Seafloor Cavern room 4
Seafloor Cavern room 4
Seafloor Cavern: Seafloor Cavern room 5
Seafloor Cavern room 5
Seafloor Cavern: Seafloor Cavern room 6
Seafloor Cavern room 6
Seafloor Cavern: Seafloor Cavern room 7
Seafloor Cavern room 7
Seafloor Cavern: Seafloor Cavern room 8
Seafloor Cavern room 8
Seafloor Cavern: Seafloor Cavern boulder puzzle
Seafloor Cavern boulder puzzle

FAQ

How do I get into Seafloor Cavern?

Get the Mind Badge in Mossdeep City so you can use Dive, then Surf to Route 128 and Dive into the deep water. The entrance is underwater, next to the stolen submarine.

Where is TM26 Earthquake in Ruby and Sapphire?

In the deepest room of Seafloor Cavern, near the doorway. You need Strength to get to it.

What does Maxie or Archie use in Seafloor Cavern?

Mightyena Lv. 41, Crobat Lv. 41 and a Lv. 43 Camerupt for Maxie in Ruby or a Lv. 43 Sharpedo for Archie in Sapphire.

What Pokémon can you catch in Seafloor Cavern in Ruby and Sapphire?

5 species: Tentacool, Zubat, Golbat, Magikarp, Wailmer.

Sources & picture credits

Guide text is original retrogameindex writing, checked against Bulbapedia and the game data. Wild Pokémon and encounter chances for both versions, items, trainers, gifts, trades and shops come from the pret/pokeruby decompilation (pret/pokeruby 5784633ce4). Maps and sprites © Nintendo / Creatures / GAME FREAK, archived from the Bulbagarden Archives; the Hoenn map is drawn from the game’s own PokéNav map graphics.