This is for 1.16.5 Pixelmon when you have the Corail Tombstone

It adds Grave's Dust to dust from mostly all ghost type Pokémon so you can play with out the needs of vanilla mobs to drop it

Here is the Pokémon that drop Grave's Dust and the odds

The following Pokémon now drop 1-2 Grave's Dust at a 10% chance
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Honedge
Doublade
Aegislash
Gastly
Haunter
Gengar
Shuppet
Banette
Duskull
Dusclops
Dusknoir
Yamask-both forms
Cofagrigus
Runerigus
Sandygast
Palossand
Misdreavus
Mismagius
Drifloon
Drifblim
Litwick
Lampent
Chandelure
Phantump
Trevenant
Pumpkaboo
Gourgeist
Mimikyu
Frillish
Jellicent
Froslass
Dreepy
Drakloak
Dragapult
Lunala
Corsola-galarian
Cursola
Sinistea
Polteageist
Dhelmise
Shedinja

The following Pokémon now drop 5-10 Grave's dust at a 50% chance
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Spiritomb

The following Pokémon now drop 10-20 Grave's dust at an 80% chance
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Marshadow
Giratina
Spectrier

Grave Dust Drops For Corail Tombstone