The Smash Ball (formerly called a Smash Emblem or Smash Orb by fans) is an item shown to debut in SSBB. It appears to allow the user to activate an especially powerful Final Smash attack. To use the Smash Ball, the characters must attack the Smash Ball until he/she begins to glow. The attack can be unleashed at any time, and can only be used once, after you get the Smash Ball by pressing the B Attack button. However, the Smash Ball can be knocked out if the character with the item is damaged enough. The Smash Ball can move around on its own, making it harder for players to use; it must be attacked by the players until it breaks, and whoever breaks it will be able to use their Final Smash. This should not be confused with a normal item as it grants the user a special attack.
Due to the circumstances under which the Smash Ball appears, and the incredible power it holds, it may be possible that it is not a true item, persay, and may be in a completely separate category for being turned on or off. It may be possible that the Smash Ball can not be turned off, not being a true "item".