The Fairly OddParents (2001)

S2E12 The Boy Who Would Be Queen

Title: The Boy Who Would Be Queen Plot: Timmy informs Trixie Tang that he has a special present for her, hoping to secure an invitation to her upcoming party, although he’s not being truthful. Later, while joking about girls with Cosmo, an infuriated Wanda transforms Timmy into a girl. Embracing his new identity, Timmy sees this as an opportunity to discover what Trixie might want for her birthday at the mall. However, he also seeks to take revenge on his fairy godparents for the transformation, wishing for Cosmo to become a woman and Wanda to turn into a man.