Incredible video game soundtrack composer and the voice actor for Donkey Kong in the games, Grant Kirkhope, has said in a recent interview that he still hasn't watched the Super Mario Bros. Movie. He says that the reason for that is that Nintendo famously decided not to credit him for the DK Rap which features in the movie. He found out from a representative that Nintendo would not be adding him in the credits despite the DK Rap being written and composed and performed by Mr.