Wizards of Waverly Place - Season 4 - Eps 5: Three Maxes and a Little Lady
Alex joins Justin's wizard class to try to move up in the competition. Max joins a sophisticated wizard society. They suggest he move the wizard competition up and he moves it to a few days away. Max quits the society because he finds out that they are taking advantage of him. Alex and Justin transform into Max in an attempt to change the date of the family wizard competition back to it's original date and succeed. In the end of the episode they accidentally turn Max indefinitely into a little girl.
About Wizards of Waverly Place

Title: Wizards of Waverly Place
First Air Date: 2007-10-12
Last Air Date: 2012-01-06
Status: Ended
Rating: 8.5/10 (from 979 votes)
Language: EN
Seasons: 4
Total Episodes: 106
Network: Disney Channel
Genres: Comedy, Sci-Fi & Fantasy, Kids
Production Companies: It's a Laugh Productions
Synopsis
Alex, Justin and Max Russo are not your ordinary kids - they're wizards in training! While their parents run the Waverly Sub Station, the siblings struggle to balance their ordinary lives while learning to master their extraordinary powers.
Cast

Selena Gomez
Alex Russo

David Henrie
Justin Russo

Jake T. Austin
Max Russo

Jennifer Stone
Harper Finkle

David DeLuise
Jerry Russo

Maria Canals-Barrera
Theresa Russo