The Fairly OddParents: Season 2, Episode 21

2 - 21: Fool's Day Out

Tired of being pranked by everyone (his parents, Cosmo and Wanda, his friends, and the rest of the citizens of Dimmsdale), Timmy summons the April Fool, the ultimate prankster, but Timmy does not know that once the April Fool starts, he does not know when to stop. Now, Timmy and his fairies have to stop him.