A throw (投げ) is an attack performed after a character grabs an opponent that ends the grab. Throws appear in all installments of the Super Smash Bros. series. In Super Smash Bros., two types of throws can be performed by pressing left or right on the Control Stick when grabbing the opponent. Beginning in Super Smash Bros. Melee, the player can also press up or down on the control stick, triggering two other throws. The main purpose of throws in general is to either start combos or create space between the user and their opponent.
Throws cannot be escaped once started, with the exception of Donkey Kong's cargo throw and Kirby's forward and back throws in Melee. Throws also grant a short period of invincibility to the thrower when started, as a measure of protection against any bystanders; the invincibility period is 8 frames in SSB, Melee, and Brawl, while it is 18 frames in SSB4. A general rule of throws is that characters that rely on supernatural powers (Lucario, Ness, Mewtwo, Zelda, and Lucas) have better throwing abilities than characters that don't; however, this often refers merely to the damage or knockback inflicted by the throws, as weak throws tend to be useful for starting combos, and can sometimes even lead into other KO moves.
Beginning in Melee, some throws have their speeds affected by the grabbed character's weight; these are usually known as weight dependent throws. An easy example is comparing Mario's back throw speed against both Bowser and Jigglypuff; the latter is thrown about twice as fast. This effect is achieved by applying a frame multiplier to the throw equal to the target's weight divided by 100: in accordance to this formula, characters with weight values of 75 and 125 will cause a weight dependent throw to execute 25% faster and slower respectively (0.75x and 1.25x of the base duration), while a character with a weight of 100 will be thrown at the default speed. In Smash 4, the formula adds 26 x (weight / 100 - 1) to the total animation length to get the new duration, and the rest of the throw scales from frame 1 to that point.
On a final note, throws will always make fighters flinch, regardless of whether or not they have knockback-based heavy armor or knockback resistance. However, the grabbed target's weight, knockback taken multiplier, and knockback resistance will still affect how much knockback the throw will deal.
Throws in Super Smash Bros. are usually attacks of high knockback. However, throws often have low knockback scaling, and as such are poor KO moves. Because of this, they are often followed up with edgeguarding techniques. The main exception to this is Captain Falcon and Jigglypuff, whose forward throws are both used for combos.
In Melee, throws in general inflict much less damage and knockback. Many throws, usually the newly-introduced up and down throws, have the capacity to combo into subsequent attacks, including grabs; repeatedly using throws that lead into another grab is known as chain grabbing.
In Brawl, like in Melee, many throws can still be followed up with other attacks, and chaingrabs are still fairly frequent, as seen in Falco and King Dedede's down throw combos. However, due to the ability to act out of hitstun, guaranteed throw combos are now only possible at low percentages and with throws that inflict low enough knockback, making KO setups out of throws less common than in Melee. Additionally, some throws that used to KO in Melee such as Jigglypuff and Peach's forward throws have been nerfed in power.
The effect of throw invincibility is mitigated in Brawl because hitlag from an attack is only applied to the attacker, not the character using the throw. Additionally, the attacker's hitbox will be able to hit the thrower after invicibility wears off, even if it initially connects during the invicibility. Therefore, moves with either high hitlag or long-lasting hitboxes may be impossible to block with the 8 frames invincibility.
Throws have not changed much since Brawl other than an overall damage nerf. However, chaingrabbing has effectively been removed, as characters now have a 60 frame period in which they cannot be regrabbed. Also, throws have been rebalanced in terms of knockback. Characters who had weak throws (like Marth and Zero Suit Samus) had their throws' knockback heavily increased, although this also weakens their followups after a grab. On the other hand, the removal of hitstun canceling gives many new followup options out of a throw to characters like Luigi, Mr. Game & Watch, Sheik and Sonic.
Throws have significantly changed; all characters' throw speed remains the same regardless of the thrower's weight, much like in SSB. In addition, the thrower is now invincible for the whole duration of each throw.