Simple Go to tall grass in Route
111
Without cheating? You don't.
if you want to do it without cheating you'll need a ticket to get to navel rock from a Nintendo event otherwise you can't get lugia without hacking or cheating unfortunately.
Lugia is in Navel Rock, which was an event location. It is currently inaccessible without using a cheating device, for the event has ended.
You can't catch Lugia in Pokemon Diamond. You can only get it through trading or cheating.
I don't think you can get lugia in platinum but for sure you can get Lugia in Pokemon heart gold, soul silver and when you got Lugia in one of those games trade it into you,r platinum game. hope it helps Brunoistheman ;D
lugia has not been available to players without cheating or Nintendo events until heartgold and soulsilver, where you can find him in the whirl islands after obtaining the silverwing.
Cheating
you cant
You can find lugia in navel rock
No but you can get Lugia in Pokemon Xd just trade it to a GBA Pokemon version like Ruby then trade it to colosseum.
there is no such thing as Pokemon lugia ocean version
you cant.