Bulk File Renamer

# https://pastebin.com/Aq7aBPCx
# PowerShell solution to bulk rename files (e.g. "2068227794 (0x8f860be3).Wwise" to "0x8f860be3_00646.Wwise")
# This is just an example, adjust this to your needs.

$Host.UI.RawUI.WindowTitle = 'Bulk File Renamer'
$source = "C:\adjust\path"

$start = (Get-Date)

Get-ChildItem -Path $source -File -Recurse -Include "* (0x*).*" | ForEach-Object {

    if ($prev_dir -ne $_.DirectoryName) {

        $hex_list = $null
        $prev_dir = $_.DirectoryName
        $hex_list = New-Object System.Collections.Hashtable

    }

    $hex_name = ($_.BaseName).Split('()')[1]
    $cur_hex = ($_.DirectoryName + "\" + $hex_name)

    if (Test-Path ($cur_hex + $_.Extension)) {

        $new_name1 = ($hex_name + "_00001" + $_.Extension)
        $new_name2 = ($hex_name + "_00002" + $_.Extension)
        $old_name = ($cur_hex + $_.Extension)
        Rename-Item -Path $old_name -NewName $new_name1
        Rename-Item -Path $_ -NewName $new_name2
        Write-Host "Renamed '$old_name' to '$new_name1' `nRenamed '$_' to '$new_name2'"

    } elseif (Test-Path ($cur_hex + "_00001" + $_.Extension)) {

        if ($hex_list.Contains($cur_hex)) {

            $i = $hex_list.Item($cur_hex) + 1
            $n = "_{0:D5}" -f $i
            $hex_list.Remove($cur_hex)
            $hex_list.Add($cur_hex, $i)

        } else {

            $n = "_00001"
            $i = 1

            while (Test-Path ($cur_hex + $n + $_.Extension)) {

                $i++
                $n = "_{0:D5}" -f $i

            }

            $hex_list.Add($cur_hex, $i)

        }

        $new_name = ($hex_name + $n + $_.Extension)
        Rename-Item -Path $_ -NewName $new_name
        Write-Host Renamed `'$_`' to `'$new_name`'

    } else {

        $new_name = ($hex_name + $_.Extension)
        Rename-Item -Path $_ -NewName $new_name
        Write-Host Renamed `'$_`' to `'$new_name`'

    }
}

Write-Host ((Get-Date) - $start).ToString("hh\:mm\:ss\.fff")