Answer
No, Robin Szolkowy has not achieved the distinction of being the only figure skater to have won five World championships. Other notable figure skaters who have accomplished this remarkable feat include Gillis Grafström of Sweden, Sonja Henie of Norway, Irina Rodnina of the Soviet Union, and Ulrich Salchow of Sweden. They all stand alongside Robin Szolkowy as celebrated icons in the world of competitive figure skating.