概要

using UnityEditor;
using UnityEditorInternal;
using UnityEngine;

public class Example
{
    [MenuItem( "Tools/Hoge" )]
    private static void Hoge()
    {
        var invalidPath = @"\ピ/カ:チ*ュ?ウ"".<t>x|t";
        var path        = InternalEditorUtility.RemoveInvalidCharsFromFileName( invalidPath, false );

        // ピカチュウ.txt
        Debug.Log( path );
    }
}