You need to buy a GameShark cheat cartridge/system and look for codes online which are easy to find however,the gameshark itself will be tough to get but amazon or eBay should have it.
The Old Sea Chart, Mystic Ticket, and Aurora Pass all can be obtained as mystery gifts. These mystery gifts are over so it may be impossible to get one now. The Old Sea chart leads you to mew, the mystic ticket to Ho oh and Lugia, and the Aurora Pass is to Deoxys.
with an action replay or an event Did you mean Aurora?
You must go to a Nintendo sponsored event using the mystery gift to unlock the mystic ticket.
Getting Aurora and Mystic Tickets in Leaf Greenfrom a Nintendo sponsoired event AnswerUse a gameshark,codebreaker or an action replay Mystic Ticket and Aurora Ticket for ACTION REPLAY device forPOKEMON LEAFGREEN GBA (North America)First off, you'll need the (m)(m)72BC6DFB E9CA546556671F3A 6F4F4D6BYou MUST HAVE THIS ON to buy the tickets(m) for ticketsEAEF00BE 85EA8374141BB87C 83D7018F194F7975 5E68B89EPut this in to buy the tickets at a pokemart (one at a time) with the above code activeMystic TicketCF1BCCE4 F26C57D92782EFCA 4EED1397Aurora TicketCF1BCCE4 F26C57D9641B9F5D 3A0D0482Once you get the tickets, put this in to enable the next code (island enabler)DMA Disable8D671FD9 6F6BEFF278DA95DF 44018CB4Once that code is in, put this code in and start your game (with the DMA Disable on) and go to Vermillion Port to get to the islands.Island Enabler07CF2578 E43B4EBFOnce the tickets(both of em) are cleared with the sailor at Vermillion Port, turn off your Action Replay, and talk to the sailor again (to make sure you can go with the AR off). Turn the Action Replay off, save, and turn the gameboy back on with the AR out of the gameboy.
You must go to a Nintendo sponsored event using the mystery gift to unlock the mystic ticket which takes to birth island and i think navel island and there you will find lugea and ho-oh
using cheats
You can't.
The Old Sea Chart, Mystic Ticket, and Aurora Pass all can be obtained as mystery gifts. These mystery gifts are over so it may be impossible to get one now. The Old Sea chart leads you to mew, the mystic ticket to Ho oh and Lugia, and the Aurora Pass is to Deoxys.
They are only given out at Nintendo events.
The only way to get the mystic ticket was to attend specially hosted Nintendo events. These events are no longer available so now the only way to get the tickets by using cheats but the hacked pokemon tend not to obey their trainers.
Only by using gameshark or action replay.
by using an action replay
get the mystery gift
You will need to obtain the Mystic Ticket by using a cheating device, because the Mystic Ticket is no longer available as an event.
TO CATCH THE POKEMON LATIOS AND LATIAS IS TO GET THE AURORA TICKET BY USING THE NINTENDO EVENT ON THE MYSTERY GIFT
Yes. I think you can get it all at the armegeton expo but I'm not sure how. Also the tickets/key items you get from gameshark doesn't work, for me anyway.
You can only get it from a Nintendo Event or by using a cheating device.