The Fairly OddParents - Season 2 Episode 7 -

On the last day of school, Timmy is getting the perfect attendance award, but Francis is celebrating the last day by beating up all the boys. In order to avoid getting beat up by Francis, Timmy wishes he was invisible, but then has so much fun being invisible that he forgets about the awards ceremony. Now, he must rush to get his award, and avoid Mr. Crocker in the process, as he is trying to capture him because he could use him as proof that fairies exist.