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>Pokemon who merely act as a vessel/channel for spirits and draw power from them
Sensu Oricorio
Alolan Marowak
Hisuian Typhlosion
Decidueye
Lunala
Basculegion
Skeledirge
Ceruledge
>Pokemon who are spirit/yokai-like in nature, not necessarily dead. Often inhabit objects.
Misdreavus, Mismagius and Flutter Mane
Shuppet and Banette
Duskull, Dusclops and Dusknoir
Sinistea And Polteageist
Spectrier
Ghimmighoul and Gholdengo
Drifloon and Drifblim
Litwick, Lampent and Chandelure
Pumpkaboo and Gourgeist
Sandygast and Palossand
Mimkyu
Dhelmise
Sableye
Froslass
Rotom
Galarian Yamask and Runerigus
Frillish and Jellicent
Golett and Golurk
Honedge, Doublade and Aegislash
Hoopa
Marshadow
Blacephalon
Poltchageist and Sinistcha
>Pokemon who are the reincarnated soul of a deceased living being aka actual ghosts
Yamask and Cofragigus
Galarian Corsola and Cursola
Greavard and Houndstone
Gastly, Haunter and Gengar
Spiritomb
Phantump and Trevenant
Shedinja (technically)
Hisuian Zorua and Hisuian Zoroark
Dreepy, Drakloak and Dragapult
Bramblin and Brambleghast
Annihilape
Pecharunt
>Giratina
Giratina