What you need to fly the PC6 is a Single-Engine Turboprop (Land) - Single pilot Class rating (and differences training if you did your class rating on another type within that class).
JAR-FCL 1.215 is the reference.
See the appendix for a list of the types included i the class and the differences training required as well as the requirement of ATPL knowledge for the TBM700.
Regards,
DFC