Kruel KOs are a special kind of KO in All Star Smashers. To Kruel KO, you must have only one opponent left on the stage on his or her last stock with at least 120% damage, and KO him/her horizontally, upwards or downwards. You must have less than 120% damage to Kruel KO.
Kruel KOs on Stages
If you Kruel KO an opponent in Talk Show, the opponent will be seen defeated in a massive explosion outside the building. Then, the White Houserz version of Sonny's bro, Adam Powell shows up tragically saying "I'm sad" about the character who "died".