↑ The Super Mario Bros. 2 character credits, featuring all enemies and characters from the game, mistakenly refers to Birdo as Ostro, and vice versa, in Super Mario All-Stars.
↑ The character credits, featuring all enemies and characters, fixes the mistake of referring to Birdo as Ostro, and vice versa, in Super Mario Advance.
↑ Super Mario Bros. 2 manual. Nintendo. 1988. p. 27. He thinks he's a girl and he spits eggs from his mouth. He'd rather be called Birdetta
1 2 Loguidice, Bill; Matt Barton (2009). Vintage Games: An Insider Look at the History of Grand Theft Auto, Super Mario, and the Most Influential Games of All Time. Focal Press. p. 280. ISBN0-240-81146-1.
↑ Loguidice, Bill; Matt Barton (2009). Vintage Games: An Insider Look at the History of Grand Theft Auto, Super Mario, and the Most Influential Games of All Time. p. 280.
