Pokemon Diamond and Pearl League Lobby and Final Barry Battle Walkthrough

Finish the badge check, make the final supply plan, and defeat Barry's six-Pokemon team before entering the Elite Four rooms. This standalone section joins the route plan to the original Diamond/Pearl map, encounter, trainer, item, and script data; Platinum tables are not substituted.

Route Plan

Heal at the summit; buy Full Restores, Revives, status cures, and PP restoration; equip held items; save; approach the League attendant; defeat Barry; heal again; save in a separate slot state if possible; enter only when ready for five consecutive bosses.

• Barry's final pre-Hall-of-Fame team has six members, including Snorlax and starter-dependent Roserade/Rapidash/Floatzel coverage.
• Once the Elite Four door closes, ordinary exits are unavailable until the challenge is won or lost; prepare moves and held items first.

Exact pret map constants (3)

MAP_POKEMON_LEAGUE_LOBBY_1F MAP_POKEMON_LEAGUE_LOBBY_2F MAP_POKEMON_LEAGUE_LOBBY_B1F

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.

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

1. The rival triggers near the challenge desk. Do not spend the last healing items on him without returning to the Pokemon Center before entering Aaron's room.

Boss Strategy And Partners

Completion Checklist

• Complete the currently reachable part of this route plan: Heal at the summit; buy Full Restores, Revives, status cures, and PP restoration; equip held items; save; approach the League attendant; defeat Barry; heal again; save in a separate slot state if possible; enter only when ready for five consecutive bosses.
• 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/pokediamond at commit 038cccaed5de8f013875bc5d734f912d1de08e0f: 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.