Birdo

Birdo is a character in the Mario series. Her first appearance was in Doki Doki Panic, a Japanese game featuring her as the first boss. After its release in Japan, Nintendo of America remade it featuring Mario Characters, but kept the enemies, and bosses the same.

Birdo later on appeared in many Mario spinoff games such as Mario Tennis and Mario Golf. In most of these games, she was viewed as Yoshi's friend, but there is no real information on whether they have a relationship.

In Japan, Birdo is known as Catherine. Nintendo of America initially called him a guy like the Japanese games, but later changed it to a female after the Super Mario Bros. 2 manual described Birdo as "He thinks he's a girl and shoots eggs from his mouth." Birdo has been depicted as a female ever since.

Games
NES:
 * Doki Doki Panic - As a boss character.
 * Super Mario Bros. 2 - As a boss character.

SNES:
 * Wario's Woods - As Toad's helper.
 * Super Mario RPG - As a boss character.

Nintendo 64:
 * Mario Tennis - As a playable character.
 * Mario Golf - As a playable character.

GameCube:
 * Super Smash Bros. Melee - As a cameo and trophy.
 * Super Mario Strikers - As Yoshi's teammate.

Wii: Mario Party 8