As he appears in the Fairly OddParents, he has a "bad guy" goatee and mustache and wears a horned helmet and other barbarian clothes often attributed to the Mongols. He also carries a spiked club.
He was poofed up by Wanda so he could give Cosmo "bad" lessons. He did succeed in making Cosmo "bad". He had plans to use "Cosmo Khan", Cosmo's new name, to conquer the world. However, when Vicky Khan showed up, he immediately submitted to her demand that he and his warriors would return home, especially since she threatened to cancel the Big Yak Roast. Despite his rather rough and tough persona, when Vicky Khan confronted him, he was very submissive to her and afraid of her.