In Platinum, you have to beat the Elite Four, win a Master Rank Contest, win 100 consecutive battles in the Battle Tower, capture 50 flags in the underground and catch all 493 pokemon.
you have to complete the game perfectley
star for your trainer card. (once you get all five stars, you beat the game.)
you have to beat the elite four twice
The stars on your trainer card have absolutely no use whatsoever except for showing off to others. The stars also change the color of your trainer card.
In outer space after getting 5 (five) stars on your trainer card.
there on the back of your trainer card when you get all five stars you'll be more respected and nurse joy will change too
5 stars
There is one just either look it up on Google or YouTube it works for me.
The stars are located on the top of the card on Pokemon Ruby or Sapphire.
The black card is your trainer card with I think 5 stars
You get trainer stars by completing in-game task. You must complete the Kanto Pokedex, national Pokedex, enter the hall of fame, 200 jumps in the Pokemon Jump, and collected 200 berries in berry picking.
Here's how to get five stars on your Trainer Card in Pokemon Diamond. I don't believe you have to do these things in order, but you have to do them all to get all five. Good luck: One Star - Blue Card: Beat the Pokemon League (Elite Four and Champion) once. Two Stars - Bronze Card: Beat all Pokemon Contest categories (Cute, Smart, etc.) at the Master Rank level once. Three Stars - Silver Card: Play the Underground Capture the Flag Minigame with your friends once. Four Stars - Gold Card: Capture all Pokemon in the National Pokedex. Five Stars - Black Card: Beat the Battle Tower 100 times in a row once. Hope I helped.