Mimikyu is a small Pokémon whose body is almost entirely hidden under a cloth. Apparently, about 20 years ago, Mimikyu was sad that Pikachu was more popular than it, so it dressed up as Pikachu to become more popular with trainers. If its costume is damaged or its neck is broken, it will spend the entire night fixing it. It will then seek revenge on whoever damaged it, fearing its true identity might be revealed. Mimikyu finds it difficult to repair its neck, which often causes it to cry.