Every year on the same day, Mr. Crocker is meaner and crazier than ever. Timmy decides that if he changes Crocker's past, maybe he will be a happier person in the present.

It's Timmy's first Fairy-Versary and Cosmo and Wanda give Timmy a rule-free wish muffin which means whoever eats the muffin gets a wish that does not apply by the rules. But Mr. Crocker is still on the lookout for the fairies and showing them to the world. (imdb)