Phase 9 section
Pokemon Diamond and Pearl Elite Four Bertha Walkthrough
Break Bertha's Ground team with Grass and Water while respecting Quagsire and Whiscash's Electric immunity and Hippowdon's sand. Exact Diamond/Pearl encounters, every sourced trainer, visible and hidden items, puzzle notes, boss teams, and completion checks.
Break Bertha's Ground team with Grass and Water while respecting Quagsire and Whiscash's Electric immunity and Hippowdon's sand. 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
Pokémon League Bertha Room and Pokémon League Bertha Flint Link.
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
Lead with Grass coverage for Quagsire; use special Water or Grass attacks on Golem and Hippowdon; avoid careless physical contact into bulky targets; cure status and sand damage after the win.
- Quagsire and Whiscash are four-times weak to Grass and immune to Electric. Sudowoodo is pure Rock despite its appearance.
- Hippowdon's Sand Stream creates residual damage that persists until weather changes, increasing healing pressure for the next rooms.
Exact pret map constants (2)
MAP_POKEMON_LEAGUE_BERTHA_ROOM MAP_POKEMON_LEAGUE_BERTHA_FLINT_LINK
Wild Pokémon
No random wild encounter archive or curated static/gift row applies to this section. This is expected for some buildings, story rooms, and Gym interiors.
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.
| Trainer | Route order / placement | Full team | Reward | Access requirement | Optional / rematch note |
|---|---|---|---|---|---|
 Elite Four BerthaElite Four Bertha • source ID 262 | Pokémon League Bertha Room • scripted | ₽7,080 | Scripted story trigger; complete the local objective described in the route plan. | Major or story battle; not a VS Seeker rematch row. |
Items
No visible item ball, decoded scripted gift, or curated system reward is assigned to this section.
Hidden Items
No type-2 hidden-item event is present in the source maps assigned to this section.
Puzzles, Warps, And Switches
- If sand remains active at the end, heal non-Rock/Ground/Steel team members before advancing instead of relying on the next battle's opening turn.
Boss Strategy And Partners
Elite Four BerthaElite Four Bertha • source ID 262Full team
QuagsireDig / Double Team / Protect / Sandstorm
SudowoodoEarthquake / Sucker Punch / Hammer Arm / Sandstorm
GolemEarthquake / Gyro Ball / Brick Break / Sandstorm
WhiscashFissure / Aqua Tail / Zen Headbutt / Rock Slide
Hippowdonholds Sitrus Berry • Earthquake / Stone Edge / Crunch / Curse
Danger notes
Quagsire and Whiscash negate Electric and are four-times weak to Grass; Hippowdon brings sand and bulk.
Practical counters
A reliable Grass move is the cleanest route. Water and Ice help elsewhere, but avoid relying on Water alone into the Water/Ground members.
Completion Checklist
- Complete the currently reachable part of this route plan: Lead with Grass coverage for Quagsire; use special Water or Grass attacks on Golem and Hippowdon; avoid careless physical contact into bulky targets; cure status and sand damage after the win.
- Review all 0 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