Yes, they were reenacted for the film but the whole movie was based off what he really did. Including the rap battles
Various different rap beats are used as background to the rap battles in the movie 8 mile. For example, there is Onyx by Last Dayz.
Lose Yourself by Eminem
Epic Rap Battles of History - 2010 Genghis Khan vs- The Easter Bunny 1-8 was released on: USA: 20 April 2011
Epic Rap Battles of History - 2010 Barack Obama vs Mitt Romney 2-8 was released on: USA: 15 October 2012
Epic Rap Battles of History - 2010 Mozart vs- Skrillex 2-17 was released on: USA: 8 April 2013
He sings rap battles but he doesn't sing any of his songs. Lose yourself and superman are on the bonus track
Epic Rap Battles of History - 2010 Billy Mays vs. Ben Franklin - 1.10 was released on: USA: 23 June 2011
He was actually really nervous and shy around friends, unlike the Hollywood 8 mile bologne. he did do rap battles and he was on the poor side you can read all about him at MTV.com, that's where i got my info instead of believing everything Hollywood has to say and making stuff up! ;)
Rap Critic Reviews - 2010 Top 8 Best Rap Songs of 2012 4-1 was released on: USA: 25 January 2013
he fought 8 battles
The F-B-I- - 1965 The Rap Taker 8-16 was released on: USA: 7 January 1973
Rap Critic Reviews - 2010 No Love 2-8 was released on: USA: 18 March 2011