Phase 8 section
Pokemon Emerald Seafloor Cavern Walkthrough
Rain Badge Seafloor Cavern section for the Pokemon Emerald walkthrough with wild Pokemon, trainers, items, coordinates, requirements, and strategy notes.
Seafloor Cavern is a dedicated section page for Phase 8: Rain Badge. Solve Strength/current puzzles, beat Shelly and Archie, and trigger the Groudon/Kyogre crisis.
Trainer Art
Key Emerald trainers for this section are shown here so boss, rival, villain, and Frontier pages have the right character context.
ManifestPokemon Emerald trainer image set Assets2 trainer portraits
Route Plan
Primary source maps covered here: Underwater Seafloor Cavern, Seafloor Cavern Entrance, Seafloor Cavern Room1, Seafloor Cavern Room2, Seafloor Cavern Room3, Seafloor Cavern Room4, Seafloor Cavern Room5, Seafloor Cavern Room6, Seafloor Cavern Room7, Seafloor Cavern Room8, Seafloor Cavern Room9. Follow this page as its own checklist, then return to the phase index when the wild Pokemon, trainers, items, and boss notes are complete.
Wild Pokemon
| Area / subarea | Method | Pokemon | Level range | Odds | Time / condition | Requirements |
|---|---|---|---|---|---|---|
| Seafloor Cavern Entrance | Surf |  Tentacool | Lv. 5-35 | 60% | Any time | Surf |
| Seafloor Cavern Entrance | Surf |  Zubat | Lv. 5-35 | 35% | Any time | Surf |
| Seafloor Cavern Entrance | Surf |  Golbat | Lv. 30-35 | 5% | Any time | Surf |
| Seafloor Cavern Entrance | Old Rod |  Magikarp | Lv. 5-10 | 70% | Any time | Old Rod |
| Seafloor Cavern Entrance | Old Rod | Tentacool | Lv. 5-10 | 30% | Any time | Old Rod |
| Seafloor Cavern Entrance | Good Rod | Magikarp | Lv. 10-30 | 60% | Any time | Good Rod |
| Seafloor Cavern Entrance | Good Rod | Tentacool | Lv. 10-30 | 20% | Any time | Good Rod |
| Seafloor Cavern Entrance | Good Rod |  Wailmer | Lv. 10-30 | 20% | Any time | Good Rod |
| Seafloor Cavern Entrance | Super Rod | Wailmer | Lv. 20-45 | 100% | Any time | Super Rod |
| Seafloor Cavern Room1 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room1 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
| Seafloor Cavern Room2 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room2 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
| Seafloor Cavern Room3 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room3 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
| Seafloor Cavern Room4 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room4 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
| Seafloor Cavern Room5 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room5 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
| Seafloor Cavern Room6 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room6 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
| Seafloor Cavern Room6 | Surf | Tentacool | Lv. 5-35 | 60% | Any time | Surf |
| Seafloor Cavern Room6 | Surf | Zubat | Lv. 5-35 | 35% | Any time | Surf |
| Seafloor Cavern Room6 | Surf | Golbat | Lv. 30-35 | 5% | Any time | Surf |
| Seafloor Cavern Room6 | Old Rod | Magikarp | Lv. 5-10 | 70% | Any time | Old Rod |
| Seafloor Cavern Room6 | Old Rod | Tentacool | Lv. 5-10 | 30% | Any time | Old Rod |
| Seafloor Cavern Room6 | Good Rod | Magikarp | Lv. 10-30 | 60% | Any time | Good Rod |
| Seafloor Cavern Room6 | Good Rod | Tentacool | Lv. 10-30 | 20% | Any time | Good Rod |
| Seafloor Cavern Room6 | Good Rod | Wailmer | Lv. 10-30 | 20% | Any time | Good Rod |
| Seafloor Cavern Room6 | Super Rod | Wailmer | Lv. 20-45 | 100% | Any time | Super Rod |
| Seafloor Cavern Room7 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room7 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
| Seafloor Cavern Room7 | Surf | Tentacool | Lv. 5-35 | 60% | Any time | Surf |
| Seafloor Cavern Room7 | Surf | Zubat | Lv. 5-35 | 35% | Any time | Surf |
| Seafloor Cavern Room7 | Surf | Golbat | Lv. 30-35 | 5% | Any time | Surf |
| Seafloor Cavern Room7 | Old Rod | Magikarp | Lv. 5-10 | 70% | Any time | Old Rod |
| Seafloor Cavern Room7 | Old Rod | Tentacool | Lv. 5-10 | 30% | Any time | Old Rod |
| Seafloor Cavern Room7 | Good Rod | Magikarp | Lv. 10-30 | 60% | Any time | Good Rod |
| Seafloor Cavern Room7 | Good Rod | Tentacool | Lv. 10-30 | 20% | Any time | Good Rod |
| Seafloor Cavern Room7 | Good Rod | Wailmer | Lv. 10-30 | 20% | Any time | Good Rod |
| Seafloor Cavern Room7 | Super Rod | Wailmer | Lv. 20-45 | 100% | Any time | Super Rod |
| Seafloor Cavern Room8 | Tall grass / cave floor | Zubat | Lv. 28-35 | 90% | Any time | None |
| Seafloor Cavern Room8 | Tall grass / cave floor | Golbat | Lv. 33-36 | 10% | Any time | None |
Trainers
| Order | Area | Trainer | Team | Reward | Notes |
|---|---|---|---|---|---|
| 1 | Seafloor Cavern Room1 | Team Aqua Grunt | 720 | May have Match Call/rematch data later. | |
| 2 | Seafloor Cavern Room1 | Team Aqua Grunt | 720 | Story/route battle. | |
| 3 | Seafloor Cavern Room3 | Team Aqua Grunt | 700 | Story/route battle. | |
| 4 | Seafloor Cavern Room4 | Team Aqua Grunt | 720 | Story/route battle. | |
| 5 | Seafloor Cavern Room4 | Team Aqua Grunt | 720 | Story/route battle. | |
| 6 | Seafloor Cavern Room3 | Aqua Admin Shelly | 1480 | Story/route battle. | |
| 7 | Seafloor Cavern Room9 | Aqua Leader Archie | 3440 | Story/route battle. |
Items
| Item | Type | Location | Requirement / flag context |
|---|---|---|---|
| TM26 Earthquake | Visible | Seafloor Cavern Room9, on the north side at map coordinates (14,5) | SEAFLOOR CAVERN ROOM 9 TM EARTHQUAKE |
Boss Strategy
Aqua Admin Shelly
Reward: 1480. Heal first, check the listed levels, and bring at least one direct counter plus a backup pivot.
| Pokemon | Level | Held item | Moves |
|---|---|---|---|
 Sharpedo | Lv. 37 | - | Default level-up moves |
 Mightyena | Lv. 37 | - | Default level-up moves |
Aqua Leader Archie
Reward: 3440. Electric and Grass coverage punish the Water core; bring a Crobat answer so Confuse Ray and speed do not derail the fight.
| Pokemon | Level | Held item | Moves |
|---|---|---|---|
| Mightyena | Lv. 41 | - | Default level-up moves |
 Crobat | Lv. 41 | - | Default level-up moves |
| Sharpedo | Lv. 43 | - | Default level-up moves |
Completion Checklist
- Clear the main objective: Solve Strength/current puzzles, beat Shelly and Archie, and trigger the Groudon/Kyogre crisis.
- Review every wild Pokemon method listed for the section.
- Fight or deliberately skip every trainer listed in route order.
- Collect visible items, hidden items, and scripted rewards you care about before moving on.
- Save and heal before the boss battle.
Source Notes
- Source of truth: pret/pokeemerald
wild_encounters.json, mapmap.jsonobject/background events, mapscripts.inc,trainers.h, andtrainer_parties.h. - Encounter odds are aggregated by species and method from Emerald slot rates. Most rows are marked Any time because Emerald has no normal day/night wild encounter split.
- Pokemon table sprites use locally cached Emerald front sprites from
/guides/pokemon-emerald-pokemon-sprites.json. - Trainer art on this page uses the local Emerald trainer manifest and reused Hoenn character art where Emerald-specific artwork is not available.