Hmmm... so you browsed the datastore after the SCP and added the VM to inventory but you still don't see it? how are you connected to the vSphere server? Are you connecting to vCenter via the Web Client or thick client? Were both hosts at the same vSphere version? Have you tried disconnecting and re-connecting to that vCenter/host? Have you tried browsing and adding the VM again?
Why didn't you just use the VMware Standalone Converter to migrate the VM? Was there a reason you did an SCP transfer instead?
Tried both Web Client and Thick Client. Both hosts were at 5.5, but don't think the AMD hosts were U2. I have not tried removing and readding it, because it is currently managing both clusters.
I... didn't think about using the Converter. It's a vCenter Appliance VM, can you even run converter against that? I'm probably just going to recreate it, it's not worth the hours I'm putting in troubleshooting it.