He is very attached to Timmy, and will cry when he's not around. Depending on how he is feeling or what he is. There is now a new character called Foop (aka Anti-Poof), and undoing, a variety of different things can occur. In Wishology, Poof becomes a Ninja after watching a movie based on Timmy's victory against the Darkness. As with most young children, Poof quickly adapts to the violence that he sees or has watched. His favorite games are hide and seek and spaceman as revealed in "Planet Poof" and "He Poofs, He Scores".
Poof was shaped like a ball when he was born, in comparison to Cosmo's birth in "Fairly Odd Baby", which had him shaped more like a human. He is a new sidekick puppy to Timmy, as Cleft the boy chin wonder, when he visited like Poof, who was ball-shaped he was born, is cube-shaped. Poof also seems to have a bond with Denzel Crocker as revealed in the episode "Bad Heir Day". He is also skilled at wrestling as seen in the episode "Planet Poof". In A Fairly Odd Movie: Grow Up, Timmy Turner! Poof says his first words (spoken by Randy Jackson).