*The Switch Glitch*
Timmy is looking forward to Saturday, but his parents have to leave...and leave Vicky to babysit him. Vicky is her typical nasty self, when Timmy decides to wish that he was the babysitter. Vicky then regresses back to a 5-year-old, and Timmy then begins to do everything he can to make her miserable. However, beating on Vicky when she's just a little girl isn't as fun as he hoped.
However, things take a turn for the worse when an assistant from the Fairy World notes how miserable Vicky is, and assigns Cosmo and Wanda to her (since she's more miserable than Timmy now!). Needless to say, Vicky begins to pay back Timmy for his mistreating her, but Timmy manages to trick her into saying she's happy and doesn't need her godparents anymore.
Cosmo and Wanda are re-assigned to Timmy, who then gives Vicky a fun day, before he plans to have her returned to normal. When asked why he would do this, Timmy explains that if she hadn't made him miserable long ago, he never would have met his godparents.