You can use custom renaming to create any renaming pattern you want but it won’t replace characters in the metadata fields (e.g. title or episode name). If you want to do that try adding a PostCustomCommand to profile as explained here and run a batch script that will rename the converted file. MCEBuddy - Advanced Settings, Commands and Tweaking
Here’s an example of running a batch script through a CustomCommand (note you need PostCustomCommand):
Here’s an example of how to create a batch script to replace characters: