The Fairly OddParents - Season 8 Episode 11 -

After Timmy tells Poof a scary story, the baby's crying keeps him up all night, so Timmy wishes for no light for twelve hours of the day. However, Timmy does not know that when his godparents are kept in the dark for longer than eight hours, they become "Boogie Godparents" and turn on their godchild.