You can't, Lugia is not available in any way, shape or form in Pokémon Pearl. You can only get it through trading, migrating or cheating.
In Diamond & Pearl? Impossible without migrating, trading, or Action Replaying.
the only way to get deoxys is: a)action replay/r4 b)migrating c)trading
You can't without trading, migrating or, cheats
Only With A Action Replay And The Pokemon Modifier. Or Trading. Or Migrating.
Action Replay, Trading, Migrating. Sorry.
You can't, you can only get it by trading or migrating
Cheating with Action Replay. Go to a Pokemon event! - by imaier Cheats, trading, or migrating
U HAVE TO MIGRATE OR ACTION REPLAY
you can't get a celebi in Pokemon diamond, you only can get celebi by trading, migrating or by using action replay
there is a way...........trade
dig unerground for a fossil
There is no other possible way of getting suicune without migrating or action replay its a legendary anyway and you just get them for show