The True Oz
It turns out that the Wizard turned the Princess Ozma, the rightful ruler of Oz, over to Mombi to hide. Mombi in turn transformed Ozma into a boy named Tip!
Aired 29/12/1986EP 13 - The True Oz
1986
The Wonderful Wizard of Oz
Based on The Wonderful Wizard of Oz (1900), The Marvelous Land of Oz, Ozma of Oz, and The Emerald City of Oz (1900-1920) by L. Frank Baum (1856-1919).
(Source: AniDB)