>>19832048>>19832075Mega Milf
Chansey
Porygon2 (very uncommon)
That's really it. And the two best ghosts have Fighting coverage (Gengar Focus Blast doesn't do anything to Chansey but Aegislash Sacred Sword does, and Chansey can't do anything to Gengar.)
It's a pretty OP offensive typing, at least going by the type charts, and especially when you consider that there's only one or two good defensive dark types. However, there's really only two good offensive ghosts, except in doubles where there's a bit more Chandelure. Furthermore, Shadowball is the highest BP of their moves (okay except Shadow Force but it's barely higher, only good in doubles and takes two turns.)