You Find it in soulsilver again post hall of fame at whirl island if you knocked it out before.
Shadow Lugia is not in HeartGold.
That's only in Pokemon XD
Its Lv.70
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no sorry...
yes
You need Ho-oh and Lugia
You can only catch lugia if you migrated it from firered or leafgreen. If you want lugia get one from heartgold or soulsilver version.
you dont, its not in HeartGold or SoulSilver, Ho-oh (HeartGold) or Lugia (SoulSilver) take their place. You can also get mewtwo
In Heartgold, you can still catch Lugia, only later in the game.
lugia and ho-oh. both can be caught in both soulsilver and heartgold
After you get the silver wing from the old man in pewter city