I had this same 'cat situation' years ago when I worked on
Boss Baby: Back In Business.
Try this instead:
Import the original cat into a new project. Do not use Reference, but DO check on Unlink Styles. Make your Style changes to this project, and save it as a variation of a cat. I also recommend changing the Style names to associate them with this particular cat. It's not absolutely necessary, but it may help identify these styles later.
Repeat this for each Cat variant.
When you have all your variants ready, you can import each as a Reference or Duplicate, and they should all be unique.
(Note: The current version of Moho has a problem with References, where all the channels may get unexpectedly keyframed. I suggest using Dupiicates unless you absolutely need References. LM is aware of the bug, so hopefully, a fix will come before too long.)
I think the reason the Unlink option doesn't work with references is because Styles are not a keyframeable property. So changing the Styles in a Reference may
appear to work at first, but when you reload the project, the changes disappear because no keyframes are available to indicate the change. This isn't a bug, by the way; it's just how References works. That said, I would love to see this option improved in the future.
Hope this helps!
