Super Gender Change!

And speaking of Comic Book and Manga characters that have changed their gender at one time below are just some.

■ Birdy the Mighty - Male and female inhabit one body, shifting from one form to another.
■ Chelsea Nirvana - Turned her body into male when fused with Johnny Redbeard's essence. Her and her father's body were swapped later.
■Cloud – A Marvel character from outer space that started out looking indeed like a cloud changed kept changing back and forth from male to female.
■Courier - Male shape shifter trapped in a female form by Mr. Sinister in one X-Man comic or another
■ Fishnet Angel - Male turned into a super powered woman.
■ Futaba-kun Change – A manga in which a whole family changes their sex from time to time.
■ Guy Gardner (a Green Lantern with an attitude problem) - Turned female for a bit
■ Lady Merlyn - Old mage Merlin's life-force materialized in the form of a small girl.
■ Loki - Reincarnated as a female for a while in Marvel's Thor
■ Mighty Man - Female can turn into super powered man.
■ Ranma – Changes into a red-headed girl every time he is splashed with warm or hot water (changes back to his Japanese male self with cold.)
■ Shocking Suzi - Male turned female by the H-Dial, (don't ask, it's a long and silly story) and was trapped like it forever, because she couldn't find the device anymore to turn it off.
■ Sir Tristan - Male reincarnated as female in a re-telling of the Knights of the Round Table set in the future.
■ Spider-Man / Spider-Woman (Earth-1610) - Male cloned into female.
■ Superboy – Thought he had been turned into girl by a lady from outer space.
■ Tim Hunter – (Who was Harry Potter before there was Harry Potter) uses a glamor stone he takes on the physical attributes of his mother and also takes her name, Mary.
■ X-23 – A Marvel character is a clone of Wolverine  made female.
Also
■ In one issue of Action Comics  Mr. Myxlplyx swapped the genders of everyone on Earth save for Superman, who was away in space at the time, just to mess with his mind when he got back.
And this is just a few.