If a Ghost uses transformations, like Morphs, Polymorphs, or an ancestry-given Change Shape, what happens? Does it remain ghostly/incorporeal?
The polymorph rules say that "the special statistics can be adjusted only by circumstance bonuses, status bonuses, and penalties", however the Ghost's Float ability would change any Land Speed to a Fly Speed without being such a bonus. Can a polymorphed Ghost-Deer fly really fast?
Is the Ghost recognizable as a ghost/incorporeal? What if it merged/turned into a plant or stone?
You know, I kind of thought that the incorporeal trait would have given immunity to morph/polymorph explicitly.
I guess it only makes sense, if you could shapeshift in life, why couldn't your ghost?
I'm not seeing anything jump out at me to clarify, so this seems very much in the field of GM call.
Amusingly, while my gutfeel would be that you turn into a ghostly incorporeal version of whatever form you took, technically there's nothing about polymorph that cares what form you started in. It seems weird, but it looks like there's nothing stopping a ghost from turning into a living, corporeal creature. After all, it's not like plant creatures...
On the other hand, there's no "Undead Form" I can find, so if you decided that undead always transform into undead versions of whatever form they take, there's not a lot of reason to stop you.