Yes. Grabs all the files inside the wc6 folder, even sub folders.
https://github.com/kwsch/PKHeX/blob/master/PKX/f1-Main.cs#L854-L858
if (Directory.Exists(WC6DatabasePath))
wc6db.AddRange(from file in Directory.GetFiles(WC6DatabasePath, "*", SearchOption.AllDirectories)
let fi = new FileInfo(file)
where fi.Extension == ".wc6" && fi.Length == WC6.Size
select new WC6(File.ReadAllBytes(file)));