Phase 15 section
Pokémon HeartGold & SoulSilver Event-only and discontinued content Walkthrough
Separate retail story from Wi-Fi, Mystery Gift, and external-device distributions. Exact HGSS encounters, trainers, items, puzzle route, version differences, and completion checks.
Separate retail story from Wi-Fi, Mystery Gift, and external-device distributions. This combined guide never substitutes original Gold/Silver or Crystal data for the Nintendo DS remakes.
Source maps
Ruins Of Alph Underground Hall Sinjoh Event, Ruins Of Alph Hall Entrance Sinjoh Event, Ruins Of Alph Underground Hall Sinjoh Event 2, Sinjoh Ruins Exterior, Sinjoh Ruins Mystri Stage, Sinjoh Ruins Cabin.
Version scope
HeartGold and SoulSilver are labeled per row. Event-only and external-device content is never presented as normal retail progression.
Route Plan
Use only legitimate event flags or transferred event Pokémon: Celebi opens the Ilex/Giovanni event, an event Arceus opens Sinjoh Ruins and one level-1 creation trio gift, Spiky-eared Pichu requires Pikachu-colored Pichu, and event Pokéwalker courses cannot be earned by normal Watts.
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.
Ruins Of Alph Hall Entrance Sinjoh Event
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Grass / cave floor | ||||||
 Unown | HGSS | 5 | 100% | 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) | ||||||
| Unown | HGSS | 5 | 40% | Post-National Dex swarm replacement. | ||
| Radio — Hoenn Sound (Wednesday, post-National Dex) | ||||||
| Unown | HGSS | 5 | 40% | Hoenn Sound on Wednesday after the National Dex; replaces grass slots 2-5. | ||
| Radio — Sinnoh Sound (Thursday, post-National Dex) | ||||||
| Unown | HGSS | 5 | 40% | Sinnoh Sound on Thursday after the National Dex; replaces grass slots 2-5. | ||
Ruins Of Alph Underground Hall Sinjoh Event
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Grass / cave floor | ||||||
| Unown | HGSS | 5 | 100% | 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) | ||||||
| Unown | HGSS | 5 | 40% | Post-National Dex swarm replacement. | ||
| Radio — Hoenn Sound (Wednesday, post-National Dex) | ||||||
| Unown | HGSS | 5 | 40% | Hoenn Sound on Wednesday after the National Dex; replaces grass slots 2-5. | ||
| Radio — Sinnoh Sound (Thursday, post-National Dex) | ||||||
| Unown | HGSS | 5 | 40% | Sinnoh Sound on Thursday after the National Dex; replaces grass slots 2-5. | ||
Ruins Of Alph Underground Hall Sinjoh Event 2
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Grass / cave floor | ||||||
| Unown | HGSS | 5 | 100% | 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) | ||||||
| Unown | HGSS | 5 | 40% | Post-National Dex swarm replacement. | ||
| Radio — Hoenn Sound (Wednesday, post-National Dex) | ||||||
| Unown | HGSS | 5 | 40% | Hoenn Sound on Wednesday after the National Dex; replaces grass slots 2-5. | ||
| Radio — Sinnoh Sound (Thursday, post-National Dex) | ||||||
| Unown | HGSS | 5 | 40% | Sinnoh Sound on Thursday after the National Dex; replaces grass slots 2-5. | ||
Static, gift, trade, and event Pokémon
| Pokémon | Method | Level | Requirement / note |
|---|---|---|---|
 Dialga | Gift Pokémon | Lv. 1 | Source-scripted encounter or gift; save or make party space before resolving it. |
 Palkia | Gift Pokémon | Lv. 1 | Source-scripted encounter or gift; save or make party space before resolving it. |
 Giratina | Gift Pokémon | Lv. 1 | Source-scripted encounter or gift; save or make party space before resolving it. |
Trainers
No source-placed trainer battle or configured boss branch is assigned to these exact maps.
Items And Hidden Items
No item ball, type-2 hidden item, or Apricorn tree is assigned to these exact source maps.
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 6 mapped source subareas assigned here.
- Account for 15 random, Headbutt, Safari, Contest, static, gift, trade, or event rows across the per-area tables.
- Defeat or deliberately defer all 0 listed trainer records.
- Collect 0 visible items, 0 hidden items, and 0 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
