16 Coach Wittenberg | Four-Eyed Jack

Coach Wittenberg: Arnold and his friends get Coach Wittenberg to be their new bowling coach, but all he does is yell and make them do push-ups. Its learned that Helga's bowling team is coached by Tish Wttenberg, Coach Wittenberg's ex-wife (who he later remarries in 'Best Man')
Four-eyed Jack: The ghost of a former boarding house resident is believed to have been causing strange occurrences in there when Arnold and Gerald find an old pair of glasses believing to have belonged to him.