Foop escapes from Abracatraz and, using a recording of Jorgen's voice, tricks Wanda into thinking that Jorgen has rehabilitated Foop and that the Anti-Fairy baby is ready for a play date with Poof. While Foop seems to have good intentions at first, as soon as Cosmo and Wanda turn their backs, Foop terrorizes Poof and then cries and blames Poof when his parents return. Only Timmy can warn Cosmo and Wanda of Foop's true intentions, but his pesky parents keep pulling Timmy away before he can speak, and if Poof keeps getting in trouble then he will get a time out.... In Foop's inter-dimensional play pen of doom; Tired of A.J. being a suck-up to Mr. Crocker and getting good grades for it, Timmy wishes that he was the teacher's pet, and Poof turns him into Mr. Crocker's guinea pig. Worse, Mr. Crocker is going to use guinea pig Timmy for his experiment: a genetic hybrid of different animals creating the ultimate Fairy-catching monster!