you're screwed
Chat with our AI personalities
Either get really lucky or(this may take hours)save your game befor battling Lugia. Battle him. If he isn't shiny (red in blue spots)shut your game off. Restart and reapeat.
yes
get a ditto and save your file and go to the altering cave there you can find Lugia!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Well, you better not have saved the game after articuno fainted because if you did it is gone forever! Other wise simply resart and find your way back again! **Tip** When you find a legendary save the game right in front of him so if you do kill him you can switch off and back on your game and you will have another go! and if you did save the game after killing it, if you have Pokemon XD gale of darkness then you can trade Articuno from that. and any of the other legendary birds. +lugia for the pokedex.
Did you save the game yet if yes start a new game.