Pokémon Go is really hanging in there as a trend still, so obviously it's going to be a presence this Halloween. You can get your dog in on the fun by dressing him in a cute Pikachu costume for Oct. 31. Many of the Pikachu costumes we've found are supersnuggly shirts or jackets, so they will definitely keep your pup cozy if he comes out trick-or-treating with them family. Scroll through to get some inspiration!