How To Get Black Level On Your Trainer Card On Pokemon Platinum?

1. Beat elite 4 and cynthia
2.complete national dex
3.get platinum flag underground
4.win 1 contest on master rank
5.win 100 battles in the battle Frontier
I got this from the pokemon platinum guide book

Get all five colored prints in the battle frontier

Get 100 win streak at Battle Tower.

Beet the elite for 5 x

Beat the battle tower 100 times

1. Beat Elite 4 once
2. Complete National Dex
3. Beat one Master Rank Contest
4. Beat 100 battles at Battle Tower
5. Get 50 flags in the underground (This results in Platinum Flag)
You can do these

You aren't going to like this but you have to go to the fight area ant get 100 wins in a row

1.Beat pokemon league
2.Beat master rank
3.complete national pokedex
4.get platinum flag underground
5.?