Is there ar code to get your trainer card turn black on Pokemon diamond?

To get your trainer card to turn black on Pokemon Diamond, you will need to use a cheat code. Here are the steps on how to do this:

1. Open your Pokemon Diamond game.

2. Go to the main menu.

3. Press the L + R + A + Select buttons at the same time.

4. A cheat code menu will appear.

5. Select the "Trainer Card" option.

6. Select the "Black Card" option.

7. Your trainer card will now be turned black.