Harry Three-Eye is a monster magician from Hotel Transylvania 2. He then appears in 2-D animation during the end credits.
He and his lovely assistant were performing magic tricks at the hotel. His magic tricks are not so human-friendly as he pulls a heart of a monster out of his chest, scarring the human audience.
Johnny considers his tricks are old-schooled for human.
Harry Three-Eye briefly appears in Hotel Transylvania 3: Summer Vacation.