The Beam Sword (ビームソード, Bīmu Sōdo), also referred to as Saber, is a long-range "battering item", similar in appearance to a light green lightsaber. It appeared in the entire Super Smash Bros. series; over time, its appearance gradually changed into that of a lightsaber.
In Super Smash Flash
The Beam Sword is an item in Super Smash Flash and for some reason was referred to as Saber in-game, its design is based on the Beam Sword from Super Smash Bros. Melee. As with other bettering items, the Saber has a limited use and will disappear after a certain amount of uses.
In Super Smash Flash 2
The Beam Sword reappears in Super Smash Flash 2. Its design however has been changed to be based on Brawl's Beam Sword. It can be used in the following ways:
Melee attack: The player can simply press the standard attack button to attack the opponent with it (7% damage).
Dash attack: The player performs this in the same way as they do a normal dash attack (7% damage).
Smash attack: This charges the power of the Beam Sword (21% damage). It might also change length to gain range.
Throwing: The Beam Sword can be thrown at opponents to increase damage (run + throw = 13% damage, throw = 7% damage).