MCC
An MCC course has to be completed before the issue of a multi-crew type rating.
It is not normaly part of the type rating.
If an MCC course is provided as part of a type rating, then the requirement of 20 hours in the sim can be reduced to 10 hours.
Most carriers now ask that you complete your MCC before applying, but it is not a rule or a legislation requirement, rather just another filter.
I am afraid that you were not told the whole story, which is fairly normal in aviation.
You should read up the relevant regulations, as should be the case for anything aviation related. Remember that just about everything to do with aviation is written down somewhere. If someone tells you something ask them for the relevant documentation.
Good luck.