ChangeTemplate.ps1

$master = [Sitecore.Configuration.Factory]::GetDatabase("master");

$commonFolderTemplate = $master.Templates["Common/Folder"];

$allItems = Get-ChildItem -Path '/sitecore/content/United States/Home/Test Pages' -Recurse

ForEach ($item in $allItems) {
    if($item.TemplateName -match "Local Content Folder") {
        Write-Host $item.FullPath
        $item.ChangeTemplate($commonFolderTemplate)
    }
}