Alien VS Ghost

for some time this was really bugging me.and i finaly found the place that it can get some interests.
aliens and paranormal phemonenos are the 2 famoust things,when were talking about sci-fi, all that kinda stuff.
so i wonder do aliens have ghost and stuff?
do they ever met each other?and who is more powerfull?
if we have "ghosthunters" and exorsits on earth,surely some aliens as a more advanced civilization know more about this stuff

well i dunno this requires 2 things
1-intense study of alien culture and superstiton.
2-do aliens have souls that can be trapped in a physical relm.