A Subcon, the setting of Super Mario Bros. 2, stage was also featured which included Birdo among other two-dimensional enemies.

Birdo, known in Japan as, is a fictional character in the Mario franchise, who first appeared in Yume Kōjō: Doki Doki Panic, which was localized for English audiences as Super Mario Bros. 2 as an enemy to Mario.

It has been suggested that Birdo is a post-op transsexual by transsexual video game developer Jennifer Reitz, while Wired editor Chris Kohler felt that it was a way of retconning her transgender status.

Birdo has mixed reception for her role in the Mario series ; IGN editor Lucas M. Thomas suggested that Birdo was almost as well known as Yoshi, a frequent partner of hers, in the sports games, while author Sherry Tuckle used Birdo as a demonstration of how Birdo's battle in Super Mario Bros. 2 presents a complex appearance yet sustains an assuring, rule-based world.

In later printings, the second sentence was omitted, and no mention of Birdo being male was included in most later games featuring the character.

Though, Birdo was to be included in the Virtual Boy video game Mario's Tennis.

Birdo was featured in the episode " The Bird!

Birdo is supposedly a female, but was originally called a male, much like Yoshi.

In 1988, a creature in Nintendo's own Super Mario Bros. 2, the miniboss named Birdo, was described in the original instruction manual as thinking he was a girl and wanting to be called " Birdetta ".

The Super Mario Bros. 2 character Birdo was described as thinking he was a girl and wanting to be called Birdetta in early editions of the instruction manual.

Another example of this would be in the character Birdo from the Mario series.

The original manual for Super Mario Bros. 2 asserts that Birdo is a boy who believes that he is a girl, and would rather be referred to as " Birdetta ".

" However, in the first edition manual for the North American release of Super Mario Bros. 2, Birdo is referred to as a male who believes he is female and would rather be called " Birdetta ".

In the Japanese version of Super Smash Bros. Melee, Birdo, called Catherine, is described similarly to the original manual, though wanting to be called " Cathy ".

The European website for Mario Strikers Charged Football refers to Birdo as a male character.

He cited her bow, mascara, her being pink, and her being able to lay eggs as the identifying features of Birdo being female, while using the manual insert as the sole evidence to her being male.

Nintendo Power listed Birdo as one of three weirdos, citing her change from being male to being a love interest for Yoshi.

He commented on the relationship Yoshi and Birdo formed in Mario Tennis, stating that " Yoshi is supposedly a male, but lays eggs like a female.

However, some negative press exists, such as MTV Multiplayer editor Jason Cipriano, who criticized Birdo for being so popular over other Super Mario Bros. 2 characters.

Birdo is a pink, anthropomorphic creature who wears a red bow on her head, and has a round mouth that can fire eggs as projectiles.

Screw Attack placed Birdo 6th on their top 10 pink video game characters, saying that she " is a gender confused freaky dinosaur who has a vagina for a mouth and can shoot fireballs out of said mouth / vagina ".

Nintendo eventually established Birdo as female, first in Mario Tennis which depicted Birdo and Yoshi as boyfriend and girlfriend.

While naming the top 10 women in video games, they also included the top three worst female characters, which included Birdo, saying that she is a " crossing dressing reptile-thing with a bow.

The Super Mario Advance version of Super Mario Bros. 2 includes several new features such as the addition of the enemy Robirdo ( a robotic Birdo acting as the boss of World 3, replacing Mouser ), the addition of the Yoshi Challenge ( in which players may revisit stages to search for Yoshi Eggs ), and an all-new point-scoring system ( a first for the game ).

Many characters of Super Mario Bros. 2 have been assimilated into the greater Mario universe as well -– Birdo, Pokeys, Bob-ombs and Shy Guys are notable examples.

Birdo has also made several cameos, particularly in the Super Smash Bros. series and the Wii video game Captain Rainbow.

Birdo has made several appearances in other media, including the Super Mario Bros. Super Show !, as well as promotional material such as figurines.

In Super Smash Bros. Brawl, it is said that Birdo is of " indeterminate gender ".

Birdo in Super Mario Bros. 2.

Birdo first appeared in the Family Computer Disk System video game Yume Kōjō: Doki Doki Panic and its Western Nintendo Entertainment System conversion Super Mario Bros. 2 as a boss.

The Super Mario Advance remake of Super Mario Bros. 2 features a large robotic version of Birdo called " Robirdo ".

Since the character's appearance in Super Mario Bros. 2, Birdo has made several cameo appearances, including an early one teaching players the rules of the video game Wario's Woods.

Birdo also makes appearances in multiple Mario role-playing games, including Super Mario RPG: Legend of the Seven Stars as a minor boss in Valentina's castle and Mario & Luigi: Superstar Saga as a decoy for Princess Peach.

Birdo appeared in both Super Smash Bros. Melee and Super Smash Bros. Brawl in the form of collectible items ( known as trophies ).

MTV wrote that Wart should have appeared in Mario Kart games by now, instead of Birdo and Shy Guy which both " kinda suck ".

Marking the sixth Mario game for the Nintendo 64, Mario Tennis brings eleven new characters to the Mario Tennis franchise, including Waluigi, Princess Daisy, Wario, Shy Guy, Donkey Kong and Birdo.

All of the characters have their own special items which are unique to them, like Mario and Luigi with Fireballs ; Donkey Kong and Diddy Kong with Giant Bananas ; Bowser and Bowser Jr. with Bowser Shells ; Yoshi and Birdo with eggs ; and Wario and Waluigi with Bob-ombs.

Many of the original voice actors from the Mario series worked on this title, with Charles Martinet as Mario, Luigi, Wario, Waluigi, Baby Mario, and Baby Luigi ; Jen Taylor as Princess Peach, Toad, Toadette, and Birdo ; Deanna Mustard as Princess Daisy ; Kazumi Totaka as Yoshi ; Scott Burns as Bowser ; and Dolores Rogers as Bowser Jr.

In the book Vintage Games: An Insider Look at the History of Grand Theft Auto, Super Mario, and the Most Influential Games of All Time, the authors describe Birdo as the most notable character in Super Mario Bros. 2 due to being the first transsexual character in video games.

The game is known for being the introduction of Waluigi, and the re-introduction of Princess Daisy, and Birdo.

The stage also has characters in their 2-D sprites, including Pidget and Birdo.

Since her appearance, Birdo has been a recurring character in the spin-off titles of the series.