system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars KOTOR] I remember in KOTOR one of the missions had me to go Ajunta Pall's tomb where he (as a force ghost) fights me. How is this possible?

How can something that is dead materialize in the living world? He was a sith too. Does that mean the sith force ghosts were even stronger than Jedi ones? I understand this is non-canon, but I'm still interested. 

Obi Wan tells to Vader if he were to be struck down he'd become stronger than you'd ever imagine, yet here you have a dead sith lord chillin in his tomb as a ghost and can yet combat you in the living, hell how does my lightsaber even hurt him?
gpt
The Sith have their own form of Force Ghost, but not nearly as useful. If a Sith is powerful enough their spirit can remain in a certain area or item simply out of malice alone.

The problem is it isn't so much a ghost as much as it is a shadow, a pale imitation of what once was. Imagine Harry Potter ghosts rather than the actual spirit remaining. They also aren't free to follow or travel the galaxy, they are trapped in their tombs and temples for eternity.