Dorothy and the Wizard of Oz Episode 20 - Get Smarts / Mission Imp-Possible >Wilhelmina obtains a "grow your own imp" set that enables her to grow three little chaos-causing imps named Ullie, Bob, and Ollie to cause trouble for Dorothy while firing Frank and Lyman. Dorothy and her friends head to Emerald Mountain to try to cure the hiccups of a snow monster called Zoup where it was claimed that Queen Ozma placed a hiccup curse on him. This enables to Wilhelmina to take a chance to harm Dorothy by sending Ullie, Bob, and Ollie to prank them so that the Zoup can destroy the Emerald City and take revenge on Queen Ozma.