Phase 12 section
Pokémon HeartGold & SoulSilver Pewter Gym — Brock Walkthrough
Collect the Silver or Rainbow Wing and defeat Brock. Exact HGSS encounters, trainers, items, puzzle route, version differences, and completion checks.
Collect the Silver or Rainbow Wing and defeat Brock. This combined guide never substitutes original Gold/Silver or Crystal data for the Nintendo DS remakes.
Source maps
Pewter, Pewter Museum Of Science, Pewter Northeast House, Pewter Gym, Pewter Poké Mart, Pewter Pokémon Center 1F, Pewter Pokémon Center B1F, Pewter Southwest House.
Version scope
HeartGold and SoulSilver are labeled per row. Event-only and external-device content is never presented as normal retail progression.
Route Plan
Receive the version-opposite Wing from the old man, tour the Museum, clear both Gym trainers, then exploit Water and Grass weaknesses across Brock's full fossil-and-rock team.
Wild Pokémon
Each area below has its own table, split by encounter method. Standard rates merge every base slot for a species and are shown per time window: morning 04:00-09:59, day 10:00-19:59, night 20:00-03:59. Swarm, radio-broadcast, and Headbutt tables keep their own labeled rows, and every row carries HG/SS markers. Underlying slot odds: grass 20/20/10/10/10/10/5/5/4/4/1/1; Surf 60/30/5/4/1; Rods 40/30/15/10/5; Rock Smash 80/20; Headbutt 50/15/15/10/5/5.
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Headbutt — common tree table | ||||||
 Hoothoot | HGSS | 3-5 | 50% | Common Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
 Pineco | HGSS | 3-5 | 30% | Common Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
 Wurmple | HGSS | 3-5 | 20% | Common Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
| Headbutt — rare tree table | ||||||
| Hoothoot | HGSS | 7-9 | 80% | Rare Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
| Wurmple | HGSS | 7-9 | 20% | Rare Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
| Headbutt — secret trees | ||||||
| Wurmple | HGSS | 5-9 | 65% | Secret-tree table; applies only to source-listed secret tree coordinates. | ||
 Starly | HGSS | 5-12 | 35% | Secret-tree table; applies only to source-listed secret tree coordinates. | ||
Trainers
Teams are the exact source party records. Moves and held items appear only when the trainer format defines them. Reward = last party member level × 4 × trainer-class multiplier; double battles double the base payout where the engine applies it.
| Trainer | Location / order | Full team | Reward | Battle note |
|---|---|---|---|---|
 Leader Brock BrockSource trainer ID 253 | Pewter Gym • scripted/system variant |
| ₽6,240 | Single battle. Trainer items: Full Restore, Full Restore, Full Restore. |
 Camper JerrySource trainer ID 308 | Pewter Gym • source tile (6, 20) |
| ₽800 | Single battle. |
 Hiker EdwinSource trainer ID 685 | Pewter Gym • source tile (8, 14) |
| ₽1,600 | Single battle. |
Items And Hidden Items
| Item | Method | Plain-English placement | Source tile |
|---|---|---|---|
| Wise Glasses | Visible item ball | Pick up the item ball in the west part of Pewter. | 1029, 91 |
| PP Up | Hidden / Dowsing MCHN | Use the Dowsing MCHN on the ground in the west part of Pewter, 6 tiles east and 10 tiles south from the nearest source NPC. | 1035, 101 |
| Guard Spec | Hidden / Dowsing MCHN | Use the Dowsing MCHN on the ground in the southeast part of Pewter, 1 tile west and 14 tiles south from the nearest source NPC. | 1068, 108 |
| Max Revive | Hidden / Dowsing MCHN | Use the Dowsing MCHN on the ground in the southwest part of Pewter, 12 tiles west and 8 tiles south from the nearest source NPC. | 1038, 119 |
| Blue Apricorn | Daily Apricorn tree | Harvest the source-indexed tree in Pewter; it regrows after the daily reset. | 1072, 77 |
| White Apricorn | Daily Apricorn tree | Harvest the source-indexed tree in Pewter; it regrows after the daily reset. | 1074, 77 |
Puzzles And Systems
Follow the route plan in order; source tiles in the item and trainer tables provide a QA anchor for every placed object.
Completion Checklist
- Visit all 8 mapped source subareas assigned here.
- Account for 7 random, Headbutt, Safari, Contest, static, gift, trade, or event rows across the per-area tables.
- Defeat or deliberately defer all 3 listed trainer records.
- Collect 1 visible items, 3 hidden items, and 2 Apricorn trees assigned here.
- Finish the stated story, puzzle, schedule, version, and event conditions before moving on.
Sources And Validation
- Primary source:
pret/pokeheartgoldcommit814275e4392cc21eef45a04e6dc8d980010ca2b7. - Layers: encounter banks, map headers, trainer parties, field events and scripts, Headbutt, Safari, Bug Contest, hidden items, Apricorns, phone/Pokégear, and Frontier engine data.
- Machine-readable validation report and trainer asset manifest.