Harry's father is a minor character appearing in the Sun & Moon series.
Sun & Moon
Harry said to Ash and Kiawe that he and his father were making a cake for his mother's birthday and that he shouldn't be late the next day with the milk. The next day, Harry was waiting for the milk and his father mentioned that they still had 30 minutes left. Harry's father went outside again later and saw that Kiawe and Ash just arrived with the milk, apologizing for being late. Harry's father made pictures when Harry gave the cake to his mother and later watched the battle between Kiawe's Turtonator and Ash's Pikachu with his family.