When Cookie finally arrives to the Halloween party he isn't looking like his usual bright blue self but instead is dressed up as a gingerbread man. Or monster to be more precise. He's come equipped with a large spooky-looking bowl covered in bats and grinning pumpkins so he can collect cookies in it. Hey, he didn't want to come empty handed now, did he?

"Cookies? Are dere cookies here at dis party?"

As for a trick? Possibly stealing cookies from other people could happen.