A Sacrificial KO (also called Kamikaze or abv. SKO), is a manuever in all three installments of Smash. This kind of KO is most famously used by Kirby and is called Kirbycide, which is so detailed it needs its own page. Most Sacrificial KO's forcibly drag opponents into the out-of-bounds area, thus killing both contestants. When a character uses a Sacrificial KO, their name typically replaces the "sui" part of the word "suicide" and replaces it with part of or all of the character's name (ie. Ganoncide, Dededecide, Kirbycide, etc.).
On the stage Mushroom: Kingdom, there are two platforms that fall when stood on. Any character can perform a Sacrificial KO by grabbing an opponent and allowing both characters to fall.
The suffix "-cide" is the Latin word for "kill".
A Sacrificial KO can be used to even out stocks. King Dedede and Kirby's Inhale, Ganondorf's Flame Choke, and Bowser's Flipping Slam are "Primary Sacrificial KO"s, as the character always die at the same time as their opponent. "Secondary SKO"s could go either way. SKOs mostly are used when the Kamikaze is higher damaged than their opponent. The Sacrificial KO evens out the damage, though should NEVER be used when the opponent's stock count is higher than the Kamikaze's. Also, it can be used at one stock when the Kamikaze is higher damaged and has no hope of winning, causing a Sudden Death.
- Kirby: Since the very first Smash Bros. game, people have been killing themselves with Kirby. Kirby can use his Up Throw, Back Throw, Forward Throw, and Neutral B (Inhale) to kill himself and his opponent. See Kirbycide for further information.
- Kirby can also commit sacrificial KO's after copying abilities from King Dedede or Wario. These KO's are often referred to by a portmanteau of the two characters names.
- Bowser: In Melee, Bowser could use his Koopa Klaw to grab onto an enemy in midair above one of the KO lines, sending both Bowser and his opponent plummeting to a KO, though it was relatively easy to break out of and was not very effective. Bowser utilizes a new move in Brawl, the Flying Slam, to commit Bowsercide. In Flying Slam, Bowser grabs his opponent then leaps into the sky. He flips in the air, then fall into the OB. The move can be turned on Bowser, and his movement in the air can be affected by the opponent in the move.
- Ganondorf: Ganondorf also utilizes a new move in Brawl, the Flame Choke. Ganondorf can use this suicidal attack when he uses his Flame Choke while airborne. Right after he does this, he will immediately kick down hard on his victim and keep his foot on them to which they cannot escape. Most of the time, both plunge off the stage. Depending on the size of course, this can result in a kill and a self-destruct. If used with one life on each person it will be Sudden death.
- King Dedede: King Dedede uses Inhale to try to commit Dededecide (sometimes called Regicide). He sucks in opponent into his large gut and holds them while he tries to walk over the edge.
- Wario: Wario commits "Wariocide" by using Chomp on an opponent while they are over an edge. Once the enemy is caught in Wario's jaw, they both drop straight down. The more damage the enemy has, the longer they stay in Wario's mouth. Wario is below the character so he always dies first.
- Donkey Kong: Donkey Kong's Forward Throw is used to commit "Kongocide". DK lifts his opponent onto his back and can walk freely. Opponents can break free of this however. It is more preferable to stage spike them with a throw and recover.
- Diddy Kong: To perform a Diddycide, use Diddy's Monkey Flip on a character that's over the edge. Make sure not to have Diddy extend his foot. If Diddy grabs the enemy, they both fall straight down to their deaths, with Diddy on top. This is generally not a useful technique, because if one simply presses the jump button while falling with the enemy, it will Meteor Smash them. However, when the enemy is at low percentage and/or if it is the last life, a Diddycide is useful because it forces death to the opponent.