Cosmo and Wanda in Rankin/Bass-style stop-motion in "The 12 Days of Nickmas".
Cosmo and Wanda performing "The Nutcracker Suite".
Cosmo Julius Cosma and Wanda Venus Cosma (née Fairywinkle) are Timmy Turner's fairy godparents in the Nickelodeon animated television series The Fairly OddParents! Assigned to him due to the miserable life he was leading, they grant whatever he wishes for, often with errant results. As a result of one of Timmy's wishes, Cosmo and Wanda were later blessed with the birth of their own son, Poof, in the show's sixth season.
In the series' first Christmas episode, "Christmas Every Day!", Cosmo and Wanda grant Timmy's wish that it was Christmas every day, despite that they know he is making a big mistake in doing so. Eventually, Timmy finds out because of his wish, everyone in the world is now sick of Christmas, but he unfortunately cannot reverse the wish. Cosmo and Wanda explain to him that all the fairy godparents transfer their magic to Santa Claus every Christmas Eve, and they do not get it back until Christmas is over. Cosmo and Wanda are then taken captive by the other holiday mascots (the Easter Bunny, Cupid, The April Fool, and Baby New Year), who intend to use what remains of their magic against Santa. After managing to convince the holiday mascots not to destroy Santa, and Santa manages to bring stop the endless Christmas, Timmy reunites with Cosmo and Wanda. However, next Christmas, Cosmo and Wanda, have to help Timmy and the other holiday mascots have to deliver the Christmas presents while Santa and his wife take a vacation in Hawaii.
In "Merry Wishmas", Timmy gets Cosmo and Wanda (and Poof) to deliver magic coupons to everyone in Dimmsdale on the day after Christmas, under the alias of "the Magic Mailmen". Everyone uses the coupons to wish for something they did not receive for Christmas, to the point that their reaction to "Wishmas" eventually causes Santa Claus to give up on Wishmas. Additionally, Cosmo and Wanda's boss, Jorgen Von Strangle, who likes the idea of Wishmas replacing Christmas, volunteers to become the new Magic Mailman, with Cosmo and Wanda as his sidekicks. On December 26th of the next year, Timmy manages to prevent Jorgen, Cosmo, and Wanda from delivering wish coupons again, and when everyone in the world is upset about not receiving wish coupons again, this encourages Santa to restore Christmas and go out giving presents to everyone again.
Cosmo and Wanda will also appear in the upcoming live-action film A Fairly Odd Christmas, which takes place about thirteen years after the original series. As it is a sequel to the series' first live-action film, Cosmo, Wanda, and Poof have been allowed to stay with the now-grown-up Timmy and his girlfriend Tootie, thanks to a "Timmy Turner loophole" added to Da Rules. Currently, though, not much else is known about their role in the film, except that they have to help Timmy save Christmas once again.
Cosmo and Wanda also appeared prominently in the Merry Nickmas interstitial shorts. Their most notable appearance in these shorts is a segment in which they dance to The Nutcracker Suite, while munching on a nut and a cracker in tune with the music. They also take part in the song "The 12 Days of Nickmas", illustrating the lines "Eight oddball wishes" (one of which triggers the next line of the song, provided by the series' main villain Vicky) and "Two turtles' love."