Battle Against an Unsettling Opponent is a battle theme from EarthBound that mainly plays when fighting one of four bosses. The theme seems to be mainly played on a bass, in a jazzy tone. It is also used on some normal strong enemies like the Insane Cultists. Strangely, a whirring noise can be heard in the background. This theme was remastered in Mother 3 as the song "Lucky's Room."