I actually managed to find some Halloween stickers here in Korea this year for the first time. (Don't worry, Clarissa, there weren't even close to enough of them for me to use for my class activity, so the stickers you sent were needed and much appreciated!)
Korea's take on Halloween stickers is mostly pretty similar to America's: no Frankensteins, and fewer witches and vampires, but lots of pumpkin/jack o' lanterns, ghosts, and skeletons. There was, however, one that I'm not sure you'd see in America. So I present for your amusement, the Zombie Pirate Rabbit:
I think this may be my halloween costume for next year, if I can find the makings.