Black Trainer Card
Here is what you must do to get a Black Card, with 5 stars on it.
-Beat the Elite 4.
-Complete the national pokedex... As in capture all of the Pokemon excluding Mew, Celebi, Jirachi, Arceus, Darkrai, and Shaymin.
-beat at least one Master rank contest.
-Get the platinum flag in the underground.
-Get a 100 win streak at the battle tower.
That will give you all five stars on your trainer card, giving you the Black Card.
More tricks, tips and cheats for this game are right here - Pokemon Diamond cheats
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