I choose you! Ash Ketchum is a world famous pokemon trainer and with this costume, you can dress up as him. Ash costume is from the Pokemon XY series. Wear this Halloween costume for trick-or-treating, cosplay, Halloween costume parties, pretend play, or to watch the anime. Make sure to bring along the pokedex, Pikachu, and pokeballs. ©Pokémon/Nintendo. Polyester.