The benefits to having the scrolls for Sword, Bomb, and Wheel is that you can "attach" an element to them. For example, in World 6-SECRET, if you have the Wheel scroll and you copy the Wheelie at the start of the stage, then start your roll on the ice, any enemy you come into contact with while you are still rolling will be turned to ice. The Ice-Wheel ability can also be used to make ice bridges by running over the surface of the water.