Those worked out fine for me. I just searched around for the LeafGreen ones.
The codes Hellish listedwere for FireRed only. Once you entered them in (all of them with the exception of the Aurora Ticket/Mystic Ticketwhere you only use one at a time), head over to a PokeMart and they'll be selling the ticket you chose.
And on another note, I'm pretty sure those are Action Replay.
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Anyway, here's what you enter for LeafGreen.
(Action Replay)
LeafGreen Master Code
72BC6DFB E9CA5465
56671F3A 6F4F4D6B
4.1 DMA Disabler Code
8D671FD9 6F6BEFF2
78DA95DF 44018CB4
Birth Island/Navel Rock Enabler (this makes the tickets work)
07CF2578 E43B4EBF
Buy Everything for $1 (you have to buy the tickets from a PokeMart)
B5ED95C0 6E754DA3
AD86124F 2823D8DA
*Buy the Aurora Ticket (from the PokeMart){use one at a time}
EAEF00BE 85EA8374
141BB87C 83D7018F
194F7975 5E68B89E
641B9F5D 3A0D0482
*Buy the Mystic Ticket (from the PokeMart){use one at a time}
EAEF00BE 85EA8374
141BB87C 83D7018F
194F7975 5E68B89E
2782EFCA 4EED1397
Enter the Master Code, DMA Disabler Code, Birth/Navel Enabler, and the Buy Everything for $1. Then enter in either the "Buy Mystic Ticket" code OR the "Buy Aurora Ticket" code. Head over to a PokeMart. Buy the ticket and head voer to the docks.