vmware-powercli-vcenter-detect-non-default-shares.ps1

$vms = Get-Cluster CLUSTER_NAME_YOU_WANT_TO_ANALYZE | Get-VM 
foreach ($vm in $vms)
{	
	$conf = $vm | Get-VMResourceConfiguration;
	
	if(	($conf.CpuReservationMhz -ne 0) -or ($conf.CpuLimitMhz -ne -1) 	-or ($conf.CpuSharesLevel -ne "Normal") -or 
		($conf.MemReservationMB -ne 0) 	-or ($conf.MemLimitMB -ne -1) 	-or ($conf.MemsharesLevel -ne "Normal"))
	{
		$vm | Get-VMResourceConfiguration | select-object VM,CpuReservationMhz,CpuLimitMhz,CpuSharesLevel,MemReservationMB,MemLimitMB,MemsharesLevel | ft
	}
}

Will detect any non-default share / reservation configuration and print those entries.