What two teams played in the final to advance to the npower Championship?
2012–13 Football League Championship: The 2012–13 Football League Championship (known as the npower Championship for sponsorship reasons) was the ninth season of the league under its current title and twentieth season under its current league division format. 2013 Football League Championship play-off Final: The 2013 Football League Championship play-off final was a football match contested by Crystal Palace and Watford on 27 May 2013 at Wembley Stadium to decide the third and final team to be promoted from Football League Championship to the Premier League for the 2013–14 season.
Crystal Palace and Watford