Old Chateau — Pokémon Definitive Platinum
Every wild Pokémon here, by encounter method.
Old Chateau lists 9 Pokémon across 2 encounter methods (floor, static), between level 14 and 17. One of them is on no other route's wild tables in this guide: Rotom.
Old Chateau in the official games
The original game's table for this area:
Opens up at 1 badge — Coal (Roark, Oreburgh City).
Floor Lv 14-17
Gastly20% · Lv 14
Rattata20% · Lv 15
Duskull20% · Lv 14
Zigzagoon10% · Lv 16
Sableye10% · Lv 17
Poochyena10% · Lv 17
Shuppet5% · Lv 17
Misdreavus5% · Lv 17