First you need a jack-o-lantern. When I was in grad school one of my classmates was an expert carver of anime pumpkins. I don’t know much about anime but I do admire the skill and artistry of her carving. My favorite pumpkin though still has to be the Melvil Dewey pumpkin (second from the top) she made for our cataloging class.
Next you need a costume. How about sexy mustard?
Note that there is naughty language in this clip: