Porterpat,
MakeItHappenCaptain's post and reference is on to why most of the training/checking needs to be done in the sim. The asymmetric training crash up in Darwin a few years ago was the final straw. No more check captain delegations or approvals are given to conduct asymmetric training in 'larger' aeroplanes anymore - all needs to be done in the sim.
The problem is the B200 sim is restricted when it comes to visuals i.e. can't do circuits or circling approaches because you can't see out the side window. Therefore, these visual components need to be done in the aeroplane, but the majority of checks (and all emergencies) are done in the sim. Therefore a renewal is usually spread over two days.