The Great Marsh gives you a chance to find a number of Pokémon, but you have a limited of time to do it in Pokémon Brilliant Diamond and Shining Pearl. There are specific spawns for each area of the Great Marsh, and some Pokémon are only available after you beat the game. These are all of the spawns for each area in the Great Marsh in Pokémon Brilliant Diamond and Shining Pearl.
Area 1
Morning
- AzurillBibarelBidoofBudewMarillPsyduckQuagsireStarlyWooper
Day
Night
- AzurillBibarelBidoofHoothootMarillNoctowlPsyduckQuagsireWooper
Surfing
- MarillPsyduckQuagsireWooper
Fishing
Old Rod
- Magikarp
Good rod
- BarboarchGyaradosMagikarp
Super Rod
- CarvanhaGyaradosWhiscash
Area 2
Morning
BibarelBidoofHoothootMarillNoctowlPsyduckQuagsireWooper
MarillQuagsirePsyduckWooper
Fishing
Area 3
Day
Area 4
- BibarelBidoofBudewMarillPsyduckQuagsireStarlyWooper
Area 5
Area 6
Random wild Pokémon
- CarnivineCroagunkDrapionGolduckRoseliaSkorupiStaraviaToxicroak
Random wild Pokemon after National PokéDex
- ExeggcuteGulpinKangaskhanParasShroomishYanma
