Well, Mew's ticket was never released except in Japan but there was a giveaway in the UK not too long ago so I guess you missed out... And I'm sure Nintendo isn't giving away Lugia's ticket anytime soon. Your only option is to hack/trade or get Pokemon XD: Gale of Darkness to capture Lugia at least.
On emerald someone told me to get lugia.Beat the elite 4 10 times and then beat gabby and her crew 14 times and you'll get lugia.
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Actually, you have to dance around the gameboy and then Santa Claus will give you a Lugia and a free Empoleon.
Remember: You won't get any pokémon just for beating the league x times in any game. Never.
And not, none of those cheats work.