Sacrificial KO

A sacrificial KO (also called a kamikaze or a suicidal KO) is a maneuver in the main  games and in Super Smash Flash 2 where one character KOs both themselves and an 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. Sacrificial KOs result in the user self-destructing.

Sacrificial KOs are useful if the user has a high damage percentage and the opponent has a low percentage; as the user is more likely to be KO'd in this way, 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 can be harmed by sacrificial KOs, as this often 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 such as each player's damage percentages and weight values, the knockback of the move, and the proximity to the blast line. In the case of grab-based methods, this will always result in Sudden Death.

Trivia

 * Originally, Meta Knight could move left or right when using his up throw, which made him able to perform a sacrificial KO with it more easily. However, this function was removed in a subsequent patch due to the technique already being considered effective.
 * In v0.9a of the demo, performing Kirby's or Meta Knight's sacrificial KO methods would sometimes cause the game to crash.