I'm not exactly sure - but I know it helps you get to new Pokemon arceus level 80 and shaymin level 30. Good Luck!
you only can get a mystery gift on Pokemon diamond and pearl
you get it through Nintendo event or mystery gift on Pokemon pearl platinum or diamond
use a action replay or go to a Pokemon event or try to use the mystery gift hope i helped
A real-life event where you can download mystery gifts on Pokemon Pearl
Either cheat or the mystery event
yes he was an event for diamond and pearl. and possibly platinum
by a Nintendo event
you need the azure flute i think you get it from mystery gift then go to a Nintendo event
When you use Mystery Gift in Diamond, Pearl or Platinum, you can only get 1 Mystery Gift at a time and that's only if Nintendo is holding the event. Nintendo can only have 1 Wi-Fi event at a single time.
In order to catch Registeel in Pokemon diamond, you need to have gotten a level 100 Regigias from a mystery event. This mystery event has passed, so you can no longer get Registeel in Pokemon diamond, unless a friend trades you the mystery event Registeel. The only other way to get Registeel is to trade him from Pokemon emerald, ruby, or sapphire.
Mystery Gift event
You migrate it from Ruby, Sapphire or Emerald. You get it from those games via Mystery Gift event.