I know this is my third time but this is my last desition I am new so yeah...
EVs: HP - 252 EVs , Def - 252 EVs , Sp.Def - 6 EVs
I can’t make Lugia a Physical Attacker because his Signature move, Aeroblast,Is a Special move…So Yeah…
Aeroblast- Great Power and Accuracy,STAB ,Good chance of a Critical Hit because of Lugia’s Speed and the move.
Roost- Better than Recover because it r Flying type temporarily so that Lugia is not weak to Ice,Rock and Electric,AND HEALS SO LUGIA SURVIVES FOR MORE LONGER.
Psychic- Great Power,STAB,Move coverage,Can lower Sp.Def of the target
Calm Mind- The Defence and HP is maxed up,so just gotta 'Bulk Up' the Sp.Def and make Lugia's Sp.Atk go crazy.Got to low HP while 'Bulking Up'?Just Roost it...
Enjoy your Lugia!