He has a black tophat with a thin, blue outline.
Within the files for the game, it can be found that originally, there was meant to be a Frost variant of the Glamrock Endoskeletons.
While most of the Bonnie art was removed, kids keep asking, 'Where's Bonnie? Do we all feel the same? Waste just enough time to miss the doors, so that Gregory has to remain by his side and work with him to, hopefully, put and end to his father's horrible legacy once and for all.