It is my impression that the licensing of Oracle Enterprise Manager Cloud Control is not clear to everyone. Almost every month there is a question on https://community.oracle.com/ on this topic. Let’s see what the Oracle documentation says.
Enterprise Manager Cloud Control 13c Release requires a repository database, which can be either Oracle 12c Release 1 (188.8.131.52) or Oracle 12c Release 2. Unfortunately, Oracle provides only templates for Oracle 12c Release 1 on Technet (http://www.oracle.com/technetwork/oem/enterprise-manager/downloads/db-templates-3233309.html). So I created my own template from my small Linux-based OEM Repository database (12.2, Non-CDB).
Some days ago, Oracle released a new bundle for Oracle Enterprise Manager 13.2 (Patch# 25990918). This was the reason for me to update my local test and play OEM system on my local Linux system.