The Gastly line are one of the few pokémon I’d honestly be ok with just having one ability, if it had stayed levitate. But since their final form loses said ability, let’s see what we can come up with! Some options that I could see fitting them are:
\- Shadow tag(mega Gengar has it and it does fit them lore-wise, since they stick around people constantly)
\- Prankster(all forms of these pokémon are well known for their tricks and their many status moves)
\- Infiltrator(of all ghost types, this line tends to be the one seen phasing through stuff the most, which could fit with this ability)
\- Cursed body(Gastly & Haunter specifically, to connect more with Gengar)
by Flygonizer-Obsidian