Whirlwind

The Pinwheel is the unoffical name given to the item wielded by Link in the offical trailer of The Legend of Zelda: Spirit Tracks. It appears to be a combination of the gale boomerang and deku leaf items seen in other games. It has uses such as stuning enemys and moving items. Link can be seen battling a boss with this item. It is presumably the first boss as Link has only three hearts in the first trailer although he has five in the second. The additional hearts could be found on the overworld or the boss is faught twice.