b4us:

I know everyone’s talking about how the cast of Danny Phantom is full of gay and trans characters exclusively to piss of Butch Hartman but let us not forget, Butch’s bread and butter, Fairly Odd Parents…

Timmy’s parents were 100% sure that Timmy was going to be a girl before he was born, as seen in the episode Secret Origin of Denzel Crocker.

Cosmo seems to be the only other one in the know about this, and has baby pictures of Timmy in a dress on hand

Then, in the episode The Boy Who Would Be Queen…

When Wanda does, inevitably, transform Timmy into a girl to teach him a lesson…

Cosmo immediately panics.

AND in the episode “It’s a Wishful LIfe” when Timmy wishes he never existed…

The Turners have a daughter instead.

In conclusion:

Timmy Turner is trans and used the power of one of his fairy godparents to wish that everyone in his life completely forget that he was born and raised female for a portion of his life, including his parents and his other fairy godparent.