Vicky Khan only made one appearance in series in the episode The Really Bad Day. Timmy Turner discovered this when Cosmo had to be "bad" for a whole day. Wanda poofed up Genghis Khan and his "mindless warriors" to give Cosmo lessons in how to be bad. Khan appeared to be a really tough, ruthless warrior commander; until Vicky Khan came on the scene. She cowered Genghis Khan and his mighty warriors into submission by threatening to cancel the Big Yak Roast.