deafeat gyms, catch,defeat,or run from ho-oh and defeat the whirl islands
Shadow Lugia is not in HeartGold.
You need Ho-oh and Lugia
you need a silver wing
you need lugia & Ho-oh :-P
Yes. In whirl island but you need a special item.
That's only in Pokemon XD
777777777
Its Lv.70
You will need to trade from HeartGold or SoulSilver or migrate Ho-Oh or Lugia from a Gameboy Advance game in order to be able to have Ho-Oh or Lugia in Pokemon Pearl.
A person in Pewter City will give you the Silver Feather, then go to Whirl Islands. When you get to the end of the cave you will see Lugia.
yes
no sorry...