Phase 10 section
Pokemon Emerald Trainer Hill and Altering Cave Walkthrough
Trainer Hill and Altering Cave section for the Pokemon Emerald walkthrough with wild Pokemon, trainers, items, coordinates, requirements, and strategy notes.
Trainer Hill and Altering Cave is a dedicated section page for Phase 10: Post-Game + Battle Frontier. Clean up Emerald's optional challenge tower and event-dependent Altering Cave tables.
Phase 10 asset set
Post-Game + Battle Frontier: S.S. Tidal, Battle Frontier, Frontier Brains, Steven, roaming Lati, and post-game dungeons.
Route Plan
Primary source maps covered here: Trainer Hill Entrance, Trainer Hill 1F, Trainer Hill 2F, Trainer Hill 3F, Trainer Hill 4F, Trainer Hill Elevator, Trainer Hill Roof, Altering Cave. 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.
| Pokémon | Levels | Rate | Notes |
|---|---|---|---|
| Grass / cave floor | |||
 Zubat | 6-16 | 100% | Mystery Gift table 1 |
 Mareep | 3-13 | 100% | Mystery Gift table 2 |
 Pineco | 19-29 | 100% | Mystery Gift table 3 |
 Houndour | 12-22 | 100% | Mystery Gift table 4 |
 Teddiursa | 6-16 | 100% | Mystery Gift table 5 |
 Aipom | 18-28 | 100% | Mystery Gift table 6 |
 Shuckle | 18-28 | 100% | Mystery Gift table 7 |
 Stantler | 18-28 | 100% | Mystery Gift table 8 |
 Smeargle | 18-28 | 100% | Mystery Gift table 9 |
Trainers
No mandatory trainer battles are sourced for this section.
Items
No visible, hidden, or scripted item pickups are sourced for this section.
Completion Checklist
- Clear the main objective: Clean up Emerald's optional challenge tower and event-dependent Altering Cave tables.
- 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.
Source Notes
- Source of truth: pret/pokeemerald
wild_encounters.json, mapmap.jsonobject/background events, mapscripts.inc,trainers.h, andtrainer_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.