Ultra KO was a survival series where if someone dies,they could never appear in the video again.There were 4 casualties over the course of the series.There are 15(1 missing) episodes.It was the first true series on SparkySilverfish.Drew2756,Hofheins,Tuffy4,and NickelStickman all died in the series and MrPickleHimer17,Ellegirl8888,NateTheTV,and Corbyn_Rocks also participated.It was the first series to show Lord Salmon and spawned several other in jokes.