Born in Glostrup, both Michael and Martin Johansen started playing for local Copenhagen club Rosenhøj IF at the age of four.[2] They both went on to play for Kjøbenhavns Boldklub where they made their senior debut in the second-best Danish division in 1990. They moved to Danish Superliga club B 1903 in 1991 before they signed for FC Copenhagen upon the founding of that club in 1992. They helped the club win the Danish Superliga title in its first year of existence, and in 1996 the twins parted ways as Michael Johansen moved to the English First Division to join Bolton Wanderers. Signed for £1.250.000, he became a star at Bolton, earning the nickname "Smurf", and helped the club earn promotion to the Premier League for the 1997–98 season. Bolton's stint in the Premiership only lasted a year, before the club was once again relegated to the First Division. He also helped Bolton to the FA Cup semi final in 2000, but he was one of two Bolton players to have their penalty saved by Aston Villa goalkeeper David James as they crashed out in a penalty shootout.[3] In all, Johansen played 137 matches and scored 16 goals for Bolton.[4]
In June 2000, he returned to Denmark to play for Superliga bronze winners AB Copenhagen. As Morten Olsen became Danish national team coach in 2000, he called Johansen up for his national team debut in August 2000, in a 2–0 win against the Faroe Islands. In November 2002, Johansen won his second and last cap for Denmark, in a 2–0 win against Poland. As AB was relegated following the Danish Superliga 2003-04 season, Michael moved to amateur club Greve IF where he was reunited with Martin Johansen.[5] Michael Johansen is now a FIFA-licensed player agent.[6]