Pokemon Diamond and Pearl Old Chateau and Rotom Walkthrough

Cut into Eterna Forest's haunted mansion, search every room and hidden item, then activate the television at night for Rotom. 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

Enter Eterna Forest from the south; use Cut at the Old Chateau fence; clear 1F and all 2F side rooms; collect the Old Gateau and hidden items; return between 8:00 p.m. and 3:59 a.m.; save in the television room; interact with the TV; catch Rotom.

• Rotom requires the National Dex and the nighttime encounter period in Diamond and Pearl. Its appliance forms are not normally obtainable in these versions.
• Ghostly NPC visuals are atmospheric events rather than catchable Pokemon and should be described without inventing trainer or encounter rows.

Exact pret map constants (10)

MAP_OLD_CHATEAU_ENTRANCE MAP_OLD_CHATEAU_1F MAP_OLD_CHATEAU_2F_SIDE_ROOMS MAP_OLD_CHATEAU_2F_CORRIDOR MAP_OLD_CHATEAU_2F_ROOM_1 MAP_OLD_CHATEAU_2F_ROOM_2 MAP_OLD_CHATEAU_2F_ROOM_3 MAP_OLD_CHATEAU_2F_ROOM_4 MAP_OLD_CHATEAU_2F_ROOM_5 MAP_OLD_CHATEAU_UNUSED

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.

Old Chateau 1F

Old Chateau 2F Corridor

Old Chateau 2F Room 1

Old Chateau 2F Room 2

Old Chateau 2F Room 3

Old Chateau 2F Room 4

Old Chateau 2F Room 5

Old Chateau 2F Side Rooms

Old Chateau Entrance

Old Chateau and Rotom

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

Hidden Items

Puzzles, Warps, And Switches

1. Search the dining room, kitchen, central upstairs corridor, and every side bedroom before the TV room. The haunted visuals trigger only from certain approaches and are optional.
2. The television gives a distinctive message at night when Rotom is available; save before choosing to thump it.

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 Eterna Forest from the south; use Cut at the Old Chateau fence; clear 1F and all 2F side rooms; collect the Old Gateau and hidden items; return between 8:00 p.m. and 3:59 a.m.; save in the television room; interact with the TV; catch Rotom.
• Review all 60 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.