Fictional sports leagues are imaginative competitions created in books, movies, or video games. They often feature unique rules, teams, and characters, allowing fans to explore new worlds and engage with the sport in creative ways. Examples include the Quidditch League from the Harry Potter series and the Gladiatorial Games in The Hunger Games. These leagues can serve as a reflection of real-world sports, highlighting themes like teamwork, rivalry, and perseverance. They often capture the excitement of competition while allowing for fantastical elements, making them appealing to a wide audience.