Sacrificial KO

A Sacrificial KO (also called a Kamikaze or a Suicide) is a maneuver in the main Super Smash Bros. games and in Super Smash Flash 2 where one character KOs both him or herself and the opponent with a single move. In most cases, this involves grabbing the opponent and dragging them downwards to the bottom blast line, though self-damaging attacks can also prove effective. Most sacrificial KO's result in the user self-destructing.

Sacrificial KOs are useful if the user has a high percentage and the opponent has a low percentage; as the user is likely to be KO'd soon anyway, taking down a comparatively fresh opponent at the same time can even out the match. If the user has a lead in stocks, sacrificial KOs accelerate the match and can even score victories if the victim only has one stock remaining. In the same way, low-damage or trailing players should avoid using sacrificial KOs, as this simply brings them closer to losing. If both players have only one stock remaining, then the user can win, lose, or enter Sudden Death, depending on the exact characteristics of the individual technique.

Performing sacrificial KOs were impossible to perform in Super Smash Flash due to characters being unable to grab and throw.

Trivia

 * Originally, Meta Knight could move left or right when using his up throw which made him able to perform a sacrificial KO with his up throw more easily. However, he is unable to move left or right while using the throw after a subsequent patch. This was done to nerf Meta Knight due to him already being considered good.
 * In v0.9a of the SSF2 Demo, performing Kirby or Meta Knight's sacrificial KO methods would sometimes end up crashing the game.