DS Daily: A practical Halloween

Dressing up for Halloween is fun, but looking like H.R. Pufnstuf is bittersweet if you can't get in a couple of minutes of Face Training in under the mask between parties. To that end, we'd like you to get creative. What are some possible Halloween costumes into which you could integrate some cleverly concealed DS storage space? If you've already got a costume picked out, how could a DS-able pocket be added to it?

Alternately, should you decide not to bring your DS, the space in question could be filled with candy.