Poof is the only known nephew of Wanda's sister, Blonda, and Cosmo's brother, Schnozmo.
Poof's eye and hair color is purple, as is Juandissimo's hair and eyes, this could be a reference to an "affair", however Timmy wished Cosmo and Wanda would have a baby, and Cosmo gave birth to Poof, so this could not be possible.
Poof's Anti-Fairy opposite is Foop, who is square-shaped as opposed to being rounded.
As he was the last fairy baby to born until now, his parents, Cosmo and Wanda, are the youngest parents on Fairy World and he, is the youngest fairy.
He is voiced by Tara Strong who also does Timmy's voice.
Because of his eyelashes and color, many people have confused him for a girl.
Poof only says his own name frequently ( "Poof, poof" ) but some of the characters strangely understand this. The only known person who seems to be aware that Poof just says his own name frequently appears to be Foop as shown in Spellementary School. Because of this, he is very similar to Yoshi and Birdo from the Mario series and most Pokemon.
In the episode Hairicane, Poof grows his hair really fast.
Poof's first words in a sentence were "Yo, man. This gonna be so cool man. We're going to be bumpin', man. Tryin' to help the boys out. You know how we do it. You feel me, dawg?". Although, he had already said single words, like "mommy", "daddy" and "Timmy". He also said "Hide and seek!" in He Poofs He Scores.
In Wishing Well, he appears to have a great bond with Timmy, since he was the only other person enjoying the wishes that Timmy was making (Cosmo and Wanda were just worn out due to too many wishes being made). When Timmy was taken to Wishing Well due to overworking his godparents, he became so sad that he continued to cry until Cosmo gave him a Timmy doll which stopped Poof from crying.
He has the same voice as Bubbles from The Powerpuff Girls since they are voiced by Tara Strong.
He has appered in all episodes in season 6,7,8, and 9.
Poof was introduced in the episode "Fairly Odd Baby", which also revealed that he was a boy and that Cosmo, Poof's father, was the last baby born before him. He has appeared in every episode since that.
Poof was on the 2009 Kid's Choice Awards and has been on the KCA's ever since.