I might do it like this:

$VMsToMove = Get-Datastore "NameofDataStoreContainingTargetVMs" | Get-VM

$TargetDatastore = GetDatastore NameofTargetDatastore

Foreach ($VM in $VMsToMove)

{

Move-VM -VM $VM -Destination $TargetDatastore -Confirm:$False

}

Unless of course you have a particular need to make a CSV to import from.