Mariah lives in a small town in Hoenn that doesn't have a movie theater. As a result, she developed a friendship with Elijah, who uses his Camerupt to bring movies to small towns and have viewings for them. The first time Elijah came to her town, she was so impressed with him that she started a pen pal relationship with him.
While she was anxiously awaiting the new film to arrive, Elijah and his Camerupt were aided by Ash and his friends. They fought off Team Rocket and helped get the film to Mariah and all of her friends. Once again, she was very happy and impressed with her friend for making such an incredible journey.