dont know lol
No srry
After you beat rayquza in story mode and finish the kyogre, latios/latias, and ho oh events then there will be a toranado or something on legendary island. you must aslo have moltres, articuno, and zapdos on your team. then a new area called silver trench can be visited. at b99 floor there will be lugia.
what is luiga and what is planium?for lugia you cheat get an event migrate or trade or do GTS
you cant get Lugia in Pokemon Diamond
it is the mirage Pokemon that spinda was talking about so you have to beat fiery fields lightning fields and watery fields to find him but Im not sure because i haven't beat them all
you go to the Pokemon league and beat them and then collect the kanto badges
6 Level 100+ Pokemon, all 55 badges, secret area maybe? same for crossbreeds
You can get him by using action replay or by beating the game and transferring him from another game.
trade lugia into ur R/S/E then migrate it to Pokemon pearl then go to pal park and catch it
Lugia cannot be caught in platinum you would either have to trade with someone or use pal park
With a master ball
no only pink