Pokemon Emerald Seafloor Cavern Walkthrough

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.

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

Each area below has its own table, split by encounter method. A species row merges every slot that species occupies for the method, and rows sort by encounter rate. Emerald has no normal day/night wild encounter split, so every row applies at any time unless its note says otherwise (for example Shoal Cave tides or Altering Cave Mystery Gift tables). Underlying slot odds: grass/cave 20/20/10/10/10/10/5/5/4/4/1/1; Surf and Rock Smash 60/30/5/4/1; Old Rod 70/30; Good Rod 60/20/20; Super Rod 40/40/15/4/1.

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

Trainers

Order	Area	Trainer	Team	Reward	Notes
1	Seafloor Cavern Room1	Team Aqua Grunt	Poochyena Lv. 36	720	May have Match Call/rematch data later.
2	Seafloor Cavern Room1	Team Aqua Grunt	Carvanha Lv. 36	720	Story/route battle.
3	Seafloor Cavern Room3	Team Aqua Grunt	Mightyena Lv. 35 Golbat Lv. 35	700	Story/route battle.
4	Seafloor Cavern Room4	Team Aqua Grunt	Zubat Lv. 36	720	Story/route battle.
5	Seafloor Cavern Room4	Team Aqua Grunt	Carvanha Lv. 36	720	Story/route battle.
6	Seafloor Cavern Room3	Aqua Admin Shelly	Sharpedo Lv. 37 Mightyena Lv. 37	1480	Story/route battle.
7	Seafloor Cavern Room9	Aqua Leader Archie	Mightyena Lv. 41 Crobat Lv. 41 Sharpedo Lv. 43	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, map map.json object/background events, map scripts.inc, trainers.h, and trainer_parties.h.
• Encounter rates merge every slot a species occupies within each method band from Emerald slot rates. Emerald has no normal day/night wild encounter split, so rows apply at any time unless their notes say otherwise.
• 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.