The Fairly OddParents: Season 6, Episode 7

6 - 7: Cheese And Crockers

To celebrate half day (which resulted from his parents idiotically mistaking him getting home early from school because it was only a half of a school day as an actual holiday), Timmy wishes for a machine that allows things to merge with other items to become half-human and half-object. When Crocker gets a hold of it, he accidentally merges himself with cheese, and he uses this power to capture Timmy's fairies.