An item is an object that appears on stage that characters can use or throw. Items are a large part of the gameplay of the Super Smash Bros. series. They may appear at any time in designated spawning areas during a match or summoned by a character's special move.
List of items
The items that appear during regular gameplay and are listed under Item Switch may be broken down into several different types of categories based on how they are used and their effects.
Container items can be broken if attacked or thrown and usually releases other items when broken, but there is a small chance that a container will explode when it's destroyed.
Shooting items are items fire projectiles when used, typically replacing the neutral attack and neutral aerial of the user. They all have limited ammunition and will merely shoot blanks once it runs out. Starting in Super Smash Bros. for Nintendo 3DS and Wii U, trying to shoot an empty item will instead simply throw it.