I got Spiritomb in BDSP. AMA about the process : r/PokemonBDSP

Early Game Spiritomb Guide BDSP : r/pokemon

Spiritomb Encounter : r/PokeLeaks

Fullmoon Island: How to Catch Cresselia - Postgame Areas - Postgame, Pokémon: Brilliant Diamond & Shining Pearl

BDSP Spiritomb : r/pokemon

Pokémon BDSP How to get Spiritomb with only 2 Badges : r/PokemonBDSP

This location is the best for getting Spiritomb early. An NPC spawn is directly outside of the grasslands cave to the right, making it really easy to farm for specific ones.

How to get the National Dex in Pokemon Brilliant Diamond & Shining Pearl - Dexerto

Best Fishing Spots in BDSP - Best/Rare Pokémon - Tips & Tricks, Pokémon: Brilliant Diamond & Shining Pearl

How has no one thought of this yet? Cedric vs Doofenshmirtz (Sofia the First VS Phineas and Ferb) : r/DeathBattleMatchups

How to get the National Dex in Pokemon Brilliant Diamond & Shining Pearl - Dexerto

How to get Spiritomb in Pokemon Brilliant Diamond & Shining Pearl - Dexerto

They really did spiritomb dirty. : r/PokemonBDSP

Pokémon Brilliant Diamond and Shining Pearl Review (Switch)