In the World Championships, Fischer amassed seven gold medals, six silver, and seven bronze. Four of his gold medals were won in relays, one in the team event, one in the individual, and one in the mass start. In the sprint he has one of his silver medals (Hochfilzen 2005). He has three bronze from the pursuit (Kontiolahti 1999, Pokljuka 2001, and Hochfilzen 2005). In the mass start he has one gold (Oslo Holmenkollen 1999), two silver (Khanty-Mansiysk 2003 and Hochfilzen 2005), and one bronze (Pokljuka 2001). His remaining silver and two bronze came in the relay (silver in Ruhpolding 1996, bronzes in Borovets 1993 and Lahti 2000).