The Pumpkinator was created when the irresponsible 10 year old "Timmy Turner" used his Fairy God Parents to wish that every costume on halloween was real. This transformed four of his classmates into the components of a doomsday weapon known as the Pumpkinator. Timmy was narrowly able to unwish the wish and send the Pumpkinator to a small island in the Bermuda triangle known as Un-Wish island. It's unknown how the Pumpkinator came to Halloween Town, perhaps because of his overall halloween theme. Either way he would come to work for Oogie Boogie.