Phase 12 section
Pokémon HeartGold & SoulSilver Radio restoration, Snorlax, and Diglett's Cave Walkthrough
Return the Machine Part, obtain EXPN, and open western Kanto. Exact HGSS encounters, trainers, items, puzzle route, version differences, and completion checks.
Return the Machine Part, obtain EXPN, and open western Kanto. This combined guide never substitutes original Gold/Silver or Crystal data for the Nintendo DS remakes.
Source maps
Route 11, Diglett Cave, Lavender Radio Station, Route 10 Power Plant Repaired, Route 10 Power Plant Broken.
Version scope
HeartGold and SoulSilver are labeled per row. Event-only and external-device content is never presented as normal retail progression.
Route Plan
Deliver the Machine Part to the Power Plant, collect the EXPN Card at Lavender Radio Tower, tune Pokégear Radio to Poké Flute beside Snorlax, catch or defeat it, then cross Diglett's Cave.
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.
Diglett Cave
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Grass / cave floor | ||||||
 Diglett | HGSS | 13 or 15 or 17 or 19 | 90% | Rate counts base slots temporarily replaced by the announced daily swarm, Wednesday's Hoenn Sound broadcast, and Thursday's Sinnoh Sound broadcast. | ||
 Dugtrio | HGSS | 19 or 24 or 29 | 10% | Rate counts base slots temporarily replaced by the announced daily swarm, Wednesday's Hoenn Sound broadcast, and Thursday's Sinnoh Sound broadcast. | ||
| Swarm (post-National Dex daily announcement) | ||||||
| Diglett | HGSS | 15 or 17 | 40% | Post-National Dex swarm replacement. | ||
| Radio — Hoenn Sound (Wednesday, post-National Dex) | ||||||
 Absol | HGSS | 15 or 19 | 20% | Hoenn Sound on Wednesday after the National Dex; replaces grass slots 2-5. | ||
 Makuhita | HGSS | 17 or 19 | 20% | Hoenn Sound on Wednesday after the National Dex; replaces grass slots 2-5. | ||
| Radio — Sinnoh Sound (Thursday, post-National Dex) | ||||||
 Bronzor | HGSS | 15 or 19 | 20% | Sinnoh Sound on Thursday after the National Dex; replaces grass slots 2-5. | ||
 Chingling | HGSS | 17 or 19 | 20% | Sinnoh Sound on Thursday after the National Dex; replaces grass slots 2-5. | ||
Route 11
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Grass / cave floor | ||||||
 Drowzee | HGSS | 14 or 16 | 40% | Rate counts base slots temporarily replaced by the announced daily swarm, Wednesday's Hoenn Sound broadcast, and Thursday's Sinnoh Sound broadcast. | ||
 Rattata | HGSS | 15 | 30% | Rate counts base slots temporarily replaced by the announced daily swarm, Wednesday's Hoenn Sound broadcast, and Thursday's Sinnoh Sound broadcast. | ||
 Magnemite | HGSS | 15 | 20% | Rate counts base slots temporarily replaced by the announced daily swarm, Wednesday's Hoenn Sound broadcast, and Thursday's Sinnoh Sound broadcast. | ||
 Hypno | HGSS | 16 | 10% | Rate counts base slots temporarily replaced by the announced daily swarm, Wednesday's Hoenn Sound broadcast, and Thursday's Sinnoh Sound broadcast. | ||
| Swarm (post-National Dex daily announcement) | ||||||
| Drowzee | HGSS | 14-15 | 40% | Post-National Dex swarm replacement. | ||
| Radio — Hoenn Sound (Wednesday, post-National Dex) | ||||||
 Minun | HGSS | 15 | 20% | Hoenn Sound on Wednesday after the National Dex; replaces grass slots 2-5. | ||
 Plusle | HGSS | 14-15 | 20% | Hoenn Sound on Wednesday after the National Dex; replaces grass slots 2-5. | ||
| Radio — Sinnoh Sound (Thursday, post-National Dex) | ||||||
 Shinx | HGSS | 14-15 | 40% | Sinnoh Sound on Thursday after the National Dex; replaces grass slots 2-5. | ||
| Headbutt — common tree table | ||||||
 Spearow | HGSS | 13-14 | 50% | Common Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
 Heracross | HGSS | 13-14 | 30% | Common Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
 Combee | HGSS | 13-14 | 20% | Common Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
| Headbutt — rare tree table | ||||||
| Spearow | HGSS | 15-16 | 80% | Rare Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
| Combee | HGSS | 15-16 | 20% | Rare Headbutt table; regular-tree selection depends on Trainer ID and tree group. | ||
Static, gift, trade, and event Pokémon
| Pokémon | Method | Level | Requirement / note |
|---|---|---|---|
 Snorlax | Static encounter | Lv. 50 | Source-scripted encounter or gift; save or make party space before resolving it. |
| Snorlax | Static encounter | Lv. 50 | Tune the Pokégear Radio manually to Poké Flute while standing beside it. |
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 |
|---|---|---|---|---|
 Psychic M HermanSource trainer ID 316 | Route 11 • source tile (1380, 301) | ₽1,248 | Single battle. | |
| Psychic M FidelSource trainer ID 317 | Route 11 • source tile (1363, 300) |
| ₽1,376 | Single battle. |
 Youngster OwenSource trainer ID 380 | Route 11 • source tile (1372, 302) |
| ₽704 | Single battle. |
| Youngster JasonSource trainer ID 381 | Route 11 • source tile (1372, 295) | ₽672 | Single battle. |
Items And Hidden Items
| Item | Method | Plain-English placement | Source tile |
|---|---|---|---|
| TM86 | Visible item ball | Pick up the item ball in the northeast part of Route 11. | 1393, 292 |
| PP Max | Visible item ball | Pick up the item ball in the southwest part of Diglett Cave. | 10, 58 |
| Rock Incense | Visible item ball | Pick up the item ball in the south part of Diglett Cave. | 23, 75 |
| Revive | Hidden / Dowsing MCHN | Use the Dowsing MCHN on the ground in the north part of Route 11, 1 tile west and 3 tiles north from the nearest source NPC. | 1371, 292 |
| Max Revive | Hidden / Dowsing MCHN | Use the Dowsing MCHN on the ground in the south part of Diglett Cave, 18 tiles east and 2 tiles south from the nearest source NPC. | 28, 60 |
| Calcium | Hidden / Dowsing MCHN | Use the Dowsing MCHN on the ground in the west part of Diglett Cave. | 3, 44 |
| Green Apricorn | Daily Apricorn tree | Harvest the source-indexed tree in Route 11; it regrows after the daily reset. | 1378, 305 |
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 5 mapped source subareas assigned here.
- Account for 22 random, Headbutt, Safari, Contest, static, gift, trade, or event rows across the per-area tables.
- Defeat or deliberately defer all 4 listed trainer records.
- Collect 3 visible items, 3 hidden items, and 1 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.
Dex quick links