X is a villian in MarioGamer2222's videos.

He also appears in Rise of YouTube, where he blasts Schm2000, SMUS, and Dragon to Star Road, iJosh64 and MarioStar92 to Star World, and Starman3 to the Fourth Dimension. He also takes out Captain and Runner in SuperEmiga's Dimension and puts a fake identity called Thegeneral65000. He gets the Power Armor and is killed by MarioGame2222, but manages to destroy Mars. He betrayed Death Trappers because he only came there to train.