They give you secret items which you can only get through these events which get you secret Pokemon suchas darkrai jirachi shaymin and arceus
1) Catching-in-Game 2) Trading 3) Nintendo of America Events 4) Action Replay/Gameshark
That is Gen. 4
The Champion in Pokemon Platinum is Cynthia, the girl who gave you the egg with Togepi in it.
The rare Pokemon which you can get before the Elite Four in Pokemon Platinum are Giratina, Mesprit, Uxie, and Azelf.
Platinum will have wi fi events sometime in 2009. First go to jubilife city. go to jubilife tv. go to the person who asks u about tv on the 3rd floor. 4 the first 2 words say "everyone happy" andthe next 2 words should be "wi-fi connection". This also works in DP.
Cynthia elite 4
I think there are 4 new Pokemon but I am not sure myself.
The last person of the Elite Four in Pokemon Platinum is Lucian, the master of Psychic-type Pokemon. After him is Cynthia, the Champion.
he is the 4th elite 4.
8:00pm to 4:00am
Mime.Jr
beat elite 4