Instructions
Go to the "Pokemon Secret Phrase Generator" website.
Input your trainer ID number in the generator box.
Choose your game version by clicking on the circle next to it on the given list.
Select the language of your game -- the original wallpaper site only worked with Japanese versions where this one supports all languages.
Click on the "Send" button to generate your secret code.
Visit the man in the blue shirt on the third floor of the TV station in Jubilife City. He is the TV producer and will ask you for feedback on the television show. This is where you input your secret phrase.