The Fairly OddParents Season 4 Episode 19

Timmy starts making really bad wishes (like robo-giant-cheesepants!) So he wishes he would make only really smart/useful ones. Somehow, Jorgan manages to get them invovled with Pixies. Inc and their wish fixing business. Soon it becomes apparent that the Pixies want to take over again, and the only way to stop them is for Timmy to totally go 5 days without making a bad wish! Of course, is that even possible for Timmy to do?