From Bulbapedia, the community-driven Pokémon encyclopedia.
Mr. Gold (Japanese: ゴールド Gold) is a character of the day who appeared in An Epic Defense Force!. He is the president of Pokéstar Studios and the main producer behind a lot of successful movies. He approached Ash, Iris, Cilan, and Luke after he overheard their conversation about entering the film competition. He encouraged Luke to make a beautiful movie.
After the movies made by the contestants were shown, Mr. Gold presented the prize for the best movie, which ultimately went to Luke. He commented to Luke that his movie was filled with a lot of love and that he looked forward to his next movie.