Board Thread:General Discussion/@comment-45852457-20200715221719/@comment-39718735-20200715223427

It's completely unknown how Kars' powers would interact with stands: the Ultimate Life Form can do and morph into anything a living being can do... however that seems to apply mostly to the phyisical form of living beings. Stands operate in a different level, they are spiritual beings.

We don't know how far can Kars' ULF powers go. It can be thought his powers shouldn't be able to interact with stands: stands are based on their user's personality and soul and are unique for each one of them, Kars can only copy generic abilities of every living being on Earth.

Or it can be thought since he's the ULF every and any single existing stand power in the series can be copied by him without trouble no matter how powerful or complicated they are.