The Fairly OddParents - Season 2 - Eps 12: The Boy Who Would Be Queen
Timmy tells Trixie Tang that he has a great gift for her, so he can be invited to her party. Obviously, he's lying. Later that day, Timmy and Cosmo start making of girls, and Wanda becomes so angry she turns Timmy into a girl. Timmy decides being a girl can help him/her figure out what Trixie would like for her birthday, so he/she goes off to the mall...but not without revenge on his godparents for turning him into a girl...he wishes Cosmo was a woman and Wanda was a man.
About The Fairly OddParents

Title: The Fairly OddParents
First Air Date: 2001-03-30
Last Air Date: 2017-07-26
Status: Ended
Rating: 7.6/10 (from 1002 votes)
Language: EN
Seasons: 11
Total Episodes: 268
Network: Nickelodeon Nicktoons
Genres: Animation, Comedy, Sci-Fi & Fantasy, Kids
Production Companies: Billionfold, Frederator Studios, Nickelodeon Productions, Nickelodeon Animation Studio
Synopsis
The zany, fast-paced adventures of a 10-year-old boy and his fairy godparents, who inadvertently create havoc as they grant wishes for their pint-sized charge.
Cast

Tara Strong
Timmy Turner / Poof (voice)

Susanne Blakeslee
Wanda / Mrs. Turner (voice)

Daran Norris
Cosmo / Mr. Turner (voice)

Carlos Alazraqui
Denzel Q. Crocker (voice)

Jim Ward
Chet Ubetcha (voice)

Gary LeRoi Gray
A.J. (voice)

Grey DeLisle
Vicky (voice)

Kari Wahlgren
Chloe Carmichael (voice)