Are guidelines for generating your own creatures provided anywhere in the rulebooks or supplements for either Edge of the Empire or Age of Rebellion?
My take away from the lack of this in the rules provided is that we aren't meant to feel welcome to add to the universe.
Anyway, what are folks doing about this? Do you go about it the way you would generating a non-critter adversary? And if there's already a thread somewhere that folks could point me toward, I'll head over that way.
Thanks ahead for the help.
MTFBWY! (May the Force be with you!)