All of the final boss fights in the New Super Mario Bros. Series played 2 player co-op except for New Super Mario Bros. DS. Here are the time stamps for each boss.\rbr\rbr00:01 - New Super Mario Bros. (DS) - Final Boss\rbr01:21 - New Super Mario Bros. Wii - Final Boss (2 Player)\rbr07:00 - New Super Mario Bros. 2 - Final Boss (2 Player)\rbr12:00 - New Super Mario Bros.