 The Bears won their ninth NFL Championship, first since the AFL-NFL merger, in Super Bowl XX after the 1985 season in which they dominated the NFL with their then-revolutionary 46 defense and a cast of characters that recorded the novelty rap song "The Super Bowl Shuffle".The season was notable in that the Bears had only one loss, the "unlucky 13th" game of the season, a Monday night affair in which they were defeated by the Miami Dolphins.At the time, much was made of the fact that the Dolphins were the only franchise in history to have had an undefeated season and post-season.