Phase 9 section
Pokemon Diamond and Pearl Elite Four Aaron Walkthrough
Defeat Aaron's Bug team while accounting for Beautifly, Dustox, Vespiquen, Heracross, and Drapion's varied secondary types. Exact Diamond/Pearl encounters, every sourced trainer, visible and hidden items, puzzle notes, boss teams, and completion checks.
Defeat Aaron's Bug team while accounting for Beautifly, Dustox, Vespiquen, Heracross, and Drapion's varied secondary types. 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 Aaron Room and Pokémon League Aaron Bertha 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 strong Flying, Fire, or Rock damage; remove setup and status users quickly; preserve a Ground attacker for Drapion; heal and restore PP before taking the north lift.
- Drapion is Poison/Dark and is not weak to Fire or Flying; Ground is its only standard super-effective weakness in Generation IV.
- Vespiquen is bulky and can prolong the fight, so avoid wasting the key Ground user's health before Drapion.
Exact pret map constants (2)
MAP_POKEMON_LEAGUE_AARON_ROOM MAP_POKEMON_LEAGUE_AARON_BERTHA_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 AaronElite Four Aaron • source ID 261 | Pokémon League Aaron Room • scripted |
| ₽6,840 | 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
- The Elite Four rooms are linear. Use the connecting lift only after checking party HP, status, PP, and held-item consumption.
Boss Strategy And Partners
Elite Four AaronElite Four Aaron • source ID 261Full team
DustoxToxic / Bug Buzz / Double Team / Light Screen
BeautiflyEnergy Ball / Bug Buzz / Psychic / Shadow Ball
VespiquenAttack Order / Defend Order / Heal Order / Power Gem
HeracrossMegahorn / Close Combat / Night Slash / Stone Edge
Drapionholds Sitrus Berry • X Scissor / Cross Poison / Ice Fang / Aerial Ace
Danger notes
Drapion is not weak to Fire, Flying, or Rock like Aaron's Bug members and is his strongest closer.
Practical counters
Use Fire, Flying, or Rock early, then save Ground coverage for Drapion. Heracross also demands a fast Flying answer.
Completion Checklist
- Complete the currently reachable part of this route plan: Lead with strong Flying, Fire, or Rock damage; remove setup and status users quickly; preserve a Ground attacker for Drapion; heal and restore PP before taking the north lift.
- 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