Pokemon Diamond and Pearl Route 212, Pokemon Mansion, and Trophy Garden Walkthrough

Complete the optional westbound loop through rain and marshland, raid the Pokemon Mansion, and document Trophy Garden's daily postgame slots. 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

Start from Pastoria and clear Route 212 South; use narrow planks and mud ramps for every item; continue through Route 212 North; explore all mansion rooms; collect TM87 and the Soothe Bell; search Trophy Garden grass; exit at Hearthome.

• Mr. Backlot's special Trophy Garden visitors begin only after the National Dex. The two most recently announced species remain in the garden's special slots.
• One maid permanently blocks the trophy room in original Diamond/Pearl. Platinum's daily maid knockout challenge is excluded because it does not exist in these versions.

Exact pret map constants (7)

MAP_TROPHY_GARDEN MAP_ROUTE_212_NORTH MAP_ROUTE_212_POKEMON_MANSION_LOBBY MAP_ROUTE_212_POKEMON_MANSION_WEST_ROOMS MAP_ROUTE_212_POKEMON_MANSION_EAST_ROOM MAP_ROUTE_212_SOUTH MAP_ROUTE_212_SHARD_WEATHER_TM_HOUSE

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.

Route 212 North

Route 212 South

Trophy Garden

Route 212, Pokemon Mansion, and Trophy Garden

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

Hidden Items

Puzzles, Warps, And Switches

1. On Route 212 South, use the Bicycle's fast gear to climb muddy slopes and walk carefully along narrow beams. Clear each raised island before dropping into the next marsh patch.

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: Start from Pastoria and clear Route 212 South; use narrow planks and mud ramps for every item; continue through Route 212 North; explore all mansion rooms; collect TM87 and the Soothe Bell; search Trophy Garden grass; exit at Hearthome.
• Review all 49 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.