Prepare for thigh-high socks, red and blue wigs and T-shirts that read “Daddy’s Little Monster.” Denver’s favorite costume this Halloween is Harley Quinn. Every year costume shops stock up on the past year’s popular movie and T.V. characters. In 2015 it was Rey, Kylo Ren and others from “Star Wars: The Force Awakens.” This year, it’s “Suicide Squad,” “Batman v Superman: Dawn of Justice” and for some stores, Pokémon like Charmander and Pikachu. Related ArticlesOctober 26, 2016 Boo-yah: A guide to Denver’s musical Halloween events October 26, 2016 Castle Rock rolling out frightening slate of Halloween events October 21, 2016 “Ouija: Origin of Evil” conjures Halloween-worthy shivers Other popular costumes have come from “The Walking Dead,” the “Teenage Mutant Ninja Turtles” and the video game franchise Assassins Creed, said Brent Coker, assistant manager of Spirit Halloween on South Colorado Boulevard.