you need to go to a game event or use a device such as and action replay or a icheat system
there is no ho oh or lugia event in Pokemon platinum
There are a lot of events on Pokemon Platinum.
Y
The arceaus event
by event.
Event
Event
You have to get the event Regigigas. The event was about 2 years ago.
The only way to get Shaymin in Platinum without cheating or an event is through trading it with a friend.
NOPE!
Nintendo event
mix records