Super Mario Bros. 3 Kai - World 6-Fortress 3

After seeing a Blooper in the water, navigate a conveyor belt where a Dry Bones wanders. Cross over a few bodies of water and you’ll next see a duo of roto discs spinning around. After seeing a few roto discs, a Thwomp will move sideways. Enter the pipe and you’ll battle against Boom Boom. Jump on Boom Boom 3 times and take the ? ball to finish the stage.