Based on

Movies like The Fairly OddParents: Fairly OddBaby (2008)

Poof comes into existence when Cosmo and Wanda decide to have a child of their own, and Timmy wishes it so. However, because the fairy baby's magic is developing and uncontrollable, villains called the anti-fairies (polar opposite of fairies) and pixies (business fairies) seek to steal the fairy baby so they can take over the fairies' home, Fairy World.