* Trainer Cards in Diamond and Pearl: These games only have one basic trainer card design, which you can customize slightly with your trainer name, gender, and a small number of backgrounds and borders.
* Trainer Card Colors: There's no concept of earning different colored trainer cards based on achievements in Diamond and Pearl. This feature was introduced later in games like Black and White.
* Later Games: In Pokemon Black and White onwards, you get different colored trainer cards based on achievements like completing the Pokédex, winning gym battles, or beating the Elite Four.
So, to answer your question directly:
* Diamond and Pearl Trainer Card: It's a single design with customizable elements, not different colors based on achievements.
Let me know if you'd like more information on the trainer card system in other Pokemon games!