Go through Silver Trench, which has 99 floors, and battle him. You should have a certain type of item that makes you have a higher chance of Pokemon joining your team, but if you don't them try to battle him until you recruit him.
ok for to get lugia is to get silver trench as a place to explore then travel through then you battle him and hes gonna join your team but its a rough way hes on the 99th floor no 100th like your on the 98th and you see the stairs.He is on floor 99 not 100
well hes found silver trench on floor 99 i think u have a 70% chance of getting him. but heres the friend bow code if u need it
Friend bow:
1?8% 9-S? ?P78
92?X 6H?R K5?W
Lugia is in silver trench 99f size four ****
fight lugia
Lugia
You cant catch lugia on diamond and pearl but at red or blue rescue team in the silver trench
You have to get ho_oh on your team then beat lugia with ho-oh then kill them again
you need to recruit zapdos moltres and articuno then talk to alkazam to gain acess to lugia
keep on beating it till it joins
after Befriending Lugia Meteor cave will open up.
you get it by entering meteor cave, which is found by blastoise the next morning after recruiting lugia
Recruit all 3 birds - Articuno Zapdos Moltres then go to their friend place and the event will activate.
Silver trench 99f
Ataking it -__-