Phase 8 section
Pokemon Diamond and Pearl Mt. Coronet Ascent Walkthrough
Beacon Badge Enter from Oreburgh, combine Surf, Strength, Rock Climb, and Rock Smash, and climb the mountain's lower summit route. Exact Diamond/Pearl encounters, every sourced trainer, visible and hidden items, puzzle notes, boss teams, and completion checks.
Phase 8 Beacon Badge Galactic HQ, Mt. Coronet, Spear Pillar, Dialga or Palkia, Sunyshore City, and Volkner. 08 / 11 
Enter from Oreburgh, combine Surf, Strength, Rock Climb, and Rock Smash, and climb the mountain's lower summit route. This standalone section joins the route plan to the original Diamond/Pearl map, encounter, trainer, item, and script data; Platinum tables are not substituted.
Source maps
Mount Coronet North Mountainside and Mount Coronet South Mountainside.
Version discipline
Rows merge only when Diamond and Pearl are identical, and each row carries D/P game markers. Version-exclusive species, mascot encounters, swarms, Radar slots, and GBA insertion slots keep their own labeled rows.
Route Plan
Enter Mt. Coronet from Route 207; Surf across the northern pool; use Rock Climb; push Strength boulders; collect cave items before each staircase; exit to the mountainside; clear Galactic Grunts; re-enter the upper cave.
- Carry healing, status recovery, Repels, and many Poke Balls before beginning; the route is long and culminates in several boss battles plus a legendary encounter.
- Rock Climb creates optional treasure branches on both exterior walls. Finish each branch before using the cave entrance that advances to the summit.
Exact pret map constants (2)
MAP_MOUNT_CORONET_NORTH_MOUNTAINSIDE MAP_MOUNT_CORONET_SOUTH_MOUNTAINSIDE
Wild Pokémon
Each area below has its own table, split by encounter method. Standard grass and cave 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, Poké Radar, and GBA dual-slot replacements keep their own labeled rows. Underlying slot odds: grass 20/20/10/10/10/10/5/5/4/4/1/1; Surf and Old Rod 60/30/5/4/1; Good and Super Rod 40/40/15/4/1.
Mount Coronet North Mountainside
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Grass / cave floor | ||||||
 Abomasnow | DP | 40 | 20% | — | ||
 Machoke | DP | 39-40 | 20% | 20% | 10% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches. |
 Medicham | DP | 39-40 | 20% | 20% | 10% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches. |
 Snover | DP | 38 | 20% | — | ||
 Chingling | DP | 39-40 | 10% | — | ||
 Golbat | DP | 39 | — | — | 10% | — |
 Noctowl | DP | 39 | — | — | 10% | — |
 Bronzong | DP | 39-40 | 5% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches and GBA dual-slot insertions. | ||
 Clefairy | DP | 38-39 | 5% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches and GBA dual-slot insertions. | ||
| Poké Radar (post-National Dex) | ||||||
 Loudred | DP | 39-40 | 22% | National Dex and Poké Radar required; replacement slot applies only in a hard/vigorous-shaking Radar patch. | ||
| Dual-slot GBA insertion (post-National Dex) | ||||||
 Lunatone | DP | 38-39 | 8% | National Dex plus Pokémon Sapphire inserted in the Nintendo DS GBA slot; replaces grass slots 8-9. | ||
 Solrock | DP | 38-39 | 8% | National Dex plus Pokémon Ruby inserted in the Nintendo DS GBA slot; replaces grass slots 8-9. | ||
Mount Coronet South Mountainside
| Pokémon | Games | Levels | Rate | Requirement / notes | ||
|---|---|---|---|---|---|---|
| Morning | Day | Night | ||||
| Grass / cave floor | ||||||
| Abomasnow | DP | 40 | 20% | — | ||
| Machoke | DP | 39-40 | 20% | 20% | 10% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches. |
| Medicham | DP | 39-40 | 20% | 20% | 10% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches. |
| Snover | DP | 38 | 20% | — | ||
| Chingling | DP | 39-40 | 10% | — | ||
| Golbat | DP | 39 | — | — | 10% | — |
| Noctowl | DP | 39 | — | — | 10% | — |
| Bronzong | DP | 39-40 | 5% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches and GBA dual-slot insertions. | ||
| Clefairy | DP | 38-39 | 5% | Rate counts base slots temporarily replaced by hard-shaking Poké Radar patches and GBA dual-slot insertions. | ||
| Poké Radar (post-National Dex) | ||||||
| Loudred | DP | 39-40 | 22% | National Dex and Poké Radar required; replacement slot applies only in a hard/vigorous-shaking Radar patch. | ||
| Dual-slot GBA insertion (post-National Dex) | ||||||
| Lunatone | DP | 38-39 | 8% | National Dex plus Pokémon Sapphire inserted in the Nintendo DS GBA slot; replaces grass slots 8-9. | ||
| Solrock | DP | 38-39 | 8% | National Dex plus Pokémon Ruby inserted in the Nintendo DS GBA slot; replaces grass slots 8-9. | ||
Trainers
Field order follows the map's object-event order. Full teams include explicit held items and moves when trdata defines them; cash rewards use the in-engine final-party-slot level and trainer-class multiplier formula.
No trainer object, scripted battle, or assigned boss team is sourced for this section.
Items
No visible item ball, decoded scripted gift, or curated system reward is assigned to this section.
Hidden Items
| Hidden item | Area / plain-English placement | QA coordinate | Requirement | Source |
|---|---|---|---|---|
| Big Mushroom | Mount Coronet North Mountainside: Use the Dowsing Machine in the northern part of Mount Coronet North Mountainside, 20 tiles east and 10 tiles north of the Mount Coronet 4F Room 3 doorway or transition and inspect that exact ground tile. | (33, 9) | Dowsing Machine Pokétch app. The Spear Pillar ascent requires Surf, Strength, and Rock Climb plus the late Galactic story state. | event bank 207, script 8085 |
| Tinymushroom | Mount Coronet North Mountainside: Use the Dowsing Machine in the northwestern part of Mount Coronet North Mountainside, 8 tiles east of the Mount Coronet 4F Room 3 doorway or transition and inspect that exact ground tile. | (21, 19) | Dowsing Machine Pokétch app. The Spear Pillar ascent requires Surf, Strength, and Rock Climb plus the late Galactic story state. | event bank 207, script 8086 |
| Rare Candy | Mount Coronet North Mountainside: Use the Dowsing Machine in the northeastern part of Mount Coronet North Mountainside, 2 tiles west and 11 tiles north of the Mount Coronet Tunnel Room doorway or transition and inspect that exact ground tile. | (43, 17) | Dowsing Machine Pokétch app. The Spear Pillar ascent requires Surf, Strength, and Rock Climb plus the late Galactic story state. | event bank 207, script 8088 |
| Stardust | Mount Coronet South Mountainside: Use the Dowsing Machine in the northeastern part of Mount Coronet South Mountainside, 2 tiles east and 11 tiles north of the Mount Coronet 4F Room 1 doorway or transition and inspect that exact ground tile. | (41, 7) | Dowsing Machine Pokétch app. Reach this subarea; check the route and puzzle notes for HM, Bicycle, time, or story gates. | event bank 208, script 8084 |
| Nugget | Mount Coronet South Mountainside: Use the Dowsing Machine in the northeastern part of Mount Coronet South Mountainside, 5 tiles east and 8 tiles north of the Mount Coronet 4F Room 1 doorway or transition and inspect that exact ground tile. | (44, 10) | Dowsing Machine Pokétch app. Reach this subarea; check the route and puzzle notes for HM, Bicycle, time, or story gates. | event bank 208, script 8092 |
| Max Potion | Mount Coronet South Mountainside: Use the Dowsing Machine in the southwestern part of Mount Coronet South Mountainside, 1 tile east and 6 tiles north of the Mount Coronet South 3F doorway or transition and inspect that exact ground tile. | (13, 29) | Dowsing Machine Pokétch app. Reach this subarea; check the route and puzzle notes for HM, Bicycle, time, or story gates. | event bank 208, script 8089 |
| Full Heal | Mount Coronet South Mountainside: Use the Dowsing Machine in the southern part of Mount Coronet South Mountainside, 19 tiles east and 2 tiles north of the Mount Coronet South 3F doorway or transition and inspect that exact ground tile. | (31, 33) | Dowsing Machine Pokétch app. Reach this subarea; check the route and puzzle notes for HM, Bicycle, time, or story gates. | event bank 208, script 8090 |
Puzzles, Warps, And Switches
- From the Route 207 entrance, Surf north, climb the wall, then use Strength to reach the exterior. On each mountainside, trace the lower perimeter before climbing toward the next doorway.
Boss Strategy And Partners
No Gym Leader, rival branch, Galactic boss, Elite Four member, Champion, story partner, or major postgame battle is assigned here.
Completion Checklist
- Complete the currently reachable part of this route plan: Enter Mt. Coronet from Route 207; Surf across the northern pool; use Rock Climb; push Strength boulders; collect cave items before each staircase; exit to the mountainside; clear Galactic Grunts; re-enter the upper cave.
- Review all 24 encounter rows across the per-area tables, including game markers, method band, time-of-day rates, levels, and each conditional requirement; mark conditional rows for their stated revisit.
- Defeat or deliberately skip every currently reachable trainer row; leave HM-, story-, or National-Dex-gated rows checked only after their access requirement is met.
- Collect currently reachable visible/scripted items and berry trees, use the Dowsing Machine for reachable hidden rows, and retain every explicitly gated row for the named cleanup visit.
- Resolve every currently available puzzle note, boss branch, and partner scene before opening the next section.
Sources And Validation
pret/pokediamondat commit038cccaed5de8f013875bc5d734f912d1de08e0f:map_header.c, D/P encounter archives,trdata.json, zone events, script archives, item tables, and trainer graphics.- Encounter slots were decoded from exact 424-byte D/P members and cross-checked against Gen IV slot behavior; the 0x6C pair is day, morning uses base slots, and 0x74 is night.
- Coordinates remain visible as QA anchors, while each hidden row also provides a plain-English map-region instruction.
- Generation-wide systems that are not tied to a normal map archive—Honey Trees, Great Marsh daily rolls, Trophy Garden, fossils, Pal Park, and event items—are explicitly curated in their dedicated system pages.
Dex quick links