May's First Partner

When Lily turned Ash into Ashachu, he was supposed to return to normal by morning. But instead, he becomes fully Pikachu. In a full-blown panic, he runs from his friends, only to be taken captive by poachers and sent to a region he's never been to. After escaping, he meets a young girl only months away from beginning her journey and becomes her starter Pokemon. Advanceshipping AU.