your dog might even be a cat in this universe! Normally in a stock TV show episode, the main character gets stuck in this universe or vice versa. This is a very popular stock alternative universe for fanfics and fan art.
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Anime & Manga
- One of the special chapters of ARIA took place in an alternate universe where Undines are a male only profession. President Aria somehow got stuck in this universe and spent the whole day dealing with opposite sex versions of the whole cast.
- In Spirit Circle, looks like this is where Fuuko lives. Her life is explicitly stated to take place in an alternate universe of Fuuta's life, and she's the only one of his incarnations who is female. It also shows us her version of Fuuta's friends, all of which are also the opposite gender of their other incarnations.
- Urusei Yatsura: In one anime-original episode, Lum gets transported into a dimension where she briefly meets Gender-bent versions of Megane, the rest of the Lum stormtroopers, Ryuunouske and her(his) father(mother).
- One arc of The Authority saw the team visit an alternate universe where everyone had the opposite gender of their counterpart in the main Wildstorm universe, and where gender roles were reversed. Jack Hawksmoor walked away disturbed at the sight of his counterpart being heavily pregnant.
- In The Multiversity, the DC Universe's Earth-11 is basically "Earth-Gender Flip", with all the major characters swapped.
- In Web Warriors, one of the alternate universes is a world where everyone's gender, name, and moral alignment is opposite of their Earth-616 counterpart. It is the home of Octavia Otto.
- Exiles had this show up from time to time, though typically as one offs where the team jaunted through for a couple panels but didn't have a great deal of plot relevance.
- On a Cross and Arrow has one such universe parallel to Equestria. The mane six are sent there by a spell gone awry, and spend most of the story hiding from their male counterparts.
- The Malcolm in the Middle episode "If Girls Were Boys" deconstructs this: while Lois fantasizes about how the problems would be far less common if she had all girls instead of boys (when she was pregnant with Jamie), by the end she realizes that both genders have their problems—if she had girls, she might wish they were boys instead.
- The Red Dwarf episode appropriately titled "Parallel Universe" featured gender-bent versions of most of the main characters (except for the cat; his parallel-universe equivalent was a dog). Also, in this parallel universe, men are the ones that can get pregnant, resulting in women being the dominant gender (Wilma Shakespeare was the most famous writer in that universe, while Nellie Armstrong was the first person to walk on the moon). However, the gender gap has closed since the 60s thanks to the efforts of masculists like Jeremy Greer.
- Sliders: The antagonist of the episode "Double Cross", Logan St. Claire, is revealed towards the end to be the double of main character Quinn Mallory. This is their first time encountering such a situation, as the Sliders' doubles have typically been just that, doubles.
Quinn: That's impossible. How can my double be a woman?
Arturo: It is the difference between an X- and Y-chromosome, Mr. Mallory.
- Red Panda Adventures: In "The World Next Door", the Red Panda and Flying Squirrel meet Baboon MacSmoothie, a traveler from an alternate timeline's future, there to steal something from the past without causing a paradox. During his visit, it's learned his world is vastly different from the main universe. Among other things, the Flying Squirrel was a teenage boy named Kent Baxter, rather than an adult woman named Kit Baxter. Kit tells the Panda that "Kent" would have been her name had she been a boy. A later reference to this world mentions a male villain called the "Necromator", who the Red Panda assumed is a gender flip of one of his own Rogues' Gallery villainess, Professor Zombie.
- Implied in Super Munchkin with the "alternate dimension version" card, which changes the sex of a player character.
- Eddsworld had the episode "Mirror Mirror" in which there was a world with female versions of the main cast connected by Matt and Matilda's mirrors.
- Ennui GO! features a short run of strips in a gender-flipped alternate universe. The characters' roles and personalities were generally unchanged, although the feminine version of Noah had gigantic Gag Boobs instead of the regular Noah's Gag Penis, and the male version of Sarah had a thick mustache.
- Parodied in Val and Isaac.Val quickly got fed up of being "Girl Val" when the other Vals got together to solve a crisis (the other characters have a more or less even gender ratio across the multiverse).
- Adventure Time has a gender-bent universe that is the main setting of Ice King's stories. Examples include Fionna, a gender-bent Finn, and Cake who is a female cat that is the counterpart of Jake the Dog.
- Johnny Test: The episode "Johnny Alternative" revolves around Johnny and Dukey being sent to an alternate universe where everyone, including the duo, is the opposite gender (Johnny Test -> Joni West, Dukey -> Duchy, Eugene -> Eugenia, Susan Test -> Simon West, Mister Mittens -> Madame Mittens, etc.)
- Subverted in The Loud House episode "One of the Boys", where there seems to be a world where the Loud girls have turned into boys, Clyde, and Bobby into girls, and eventually Lincoln into a girl, but it turns out to be All Just a Dream.
- SheZow has Gal/DudePow, a Distaff Counterpart of Guy / SheZow from a alternate universe. There are also other characters in that alternate universe who are gender-flipped as well.
- In Ultimate Spider-Man, Spider-Man travels to an alternate universe where all the characters are gender-flipped. He meets his female counterpart, Petra Parker. This version of Earth is seemingly matriarchal, with Peter given a Stay in the Kitchen attitude from Petra. They still manage to work together to fight both his Green Goblin and her Green Goblin.