Seafloor Cavern Ruby & Sapphire · Dungeon

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
Seafloor Cavern on the Hoenn map
Wild Pokémon
Entrance
| Pokémon | Type | Lv. | Ruby | Sapphire |
|---|---|---|---|---|
Tentacool | WaterPoison | 5–35 | 60% | 60% |
Zubat | Poison | 5–35 | 35% | 35% |
Golbat | Poison | 30–35 | 5% | 5% |
| Rod | Pokémon | Lv. | Ruby | Sapphire |
|---|---|---|---|---|
| Old Rod | Magikarp | 5–10 | 70% | 70% |
Tentacool | 5–10 | 30% | 30% | |
| Good Rod | Magikarp | 10–30 | 60% | 60% |
Tentacool | 10–30 | 20% | 20% | |
Wailmer | 10–30 | 20% | 20% | |
| Super Rod | Wailmer | 20–45 | 100% | 100% |
Room 1, Room 2, Room 3, Room 4, Room 5, Room 8
| Pokémon | Type | Lv. | Ruby | Sapphire |
|---|---|---|---|---|
Zubat | Poison | 28–35 | 90% | 90% |
Golbat | Poison | 33–36 | 10% | 10% |
Room 6, Room 7
| Pokémon | Type | Lv. | Ruby | Sapphire |
|---|---|---|---|---|
Zubat | Poison | 28–35 | 90% | 90% |
Golbat | Poison | 33–36 | 10% | 10% |
| Pokémon | Type | Lv. | Ruby | Sapphire |
|---|---|---|---|---|
Tentacool | WaterPoison | 5–35 | 60% | 60% |
Zubat | Poison | 5–35 | 35% | 35% |
Golbat | Poison | 30–35 | 5% | 5% |
| Rod | Pokémon | Lv. | Ruby | Sapphire |
|---|---|---|---|---|
| Old Rod | Magikarp | 5–10 | 70% | 70% |
Tentacool | 5–10 | 30% | 30% | |
| Good Rod | Magikarp | 10–30 | 60% | 60% |
Tentacool | 10–30 | 20% | 20% | |
Wailmer | 10–30 | 20% | 20% | |
| Super Rod | Wailmer | 20–45 | 100% | 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


| Trainer | Pokémon | Prize | Where |
|---|---|---|---|
Team Magma Grunt Ruby | Poochyena 37 Numel 37 | ¥740 | Room 1 |
Team Aqua Grunt Sapphire | Poochyena 37 Carvanha 37 | ¥740 | Room 1 |
Team Magma Grunt Ruby | Numel 38 | ¥760 | Room 1 |
Team Aqua Grunt Sapphire | Carvanha 38 | ¥760 | Room 1 |
Magma Admin RubyCourtney | Camerupt 38 Mightyena 38 | ¥1,520 | Room 3 |
Aqua Admin SapphireShelly | Sharpedo 38 Mightyena 38 | ¥1,520 | Room 3 |
Team Magma Grunt Ruby | Poochyena 36 Zubat 36 Numel 36 | ¥720 | Room 4 |
Team Aqua Grunt Sapphire | Poochyena 36 Zubat 36 Carvanha 36 | ¥720 | Room 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
| Item | How |
|---|---|
| TM26 Earthquake | Item 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
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
- Seafloor Cavern (Bulbapedia)
- pret/pokeruby (decompiled game data)
- Map: Seafloor_Cavern_R1_RS.png
- Map: Seafloor_Cavern_R2_RS.png
- Map: Seafloor_Cavern_R3_RS.png
- Map: Seafloor_Cavern_R4_RS.png
- Map: Seafloor_Cavern_R5_RS.png
- Map: Seafloor_Cavern_R6_RS.png
- Map: Seafloor_Cavern_R7_RS.png
- Map: Seafloor_Cavern_R8_RS.png
- Map: Seafloor_Cavern_boulder_puzzle_RSE.png
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.
























