29. Q1: How do I get Deoxys/Lugia/Ho-oh/Mew/Celebi/Jirachi?
Q2: How do I get to Islands 8 and 9?
A: Deoxys and Lugia/Ho-oh are obtainable only by special Tickets (the Aurora and Mystic Tickets, respectively), which are given out by Wonderspot (see question 26 for more info).
The Aurora Ticket (for Deoxys, on Island 8) was given out at Pokemon Rocks America and at the Pokemon Center in NYC for a few days sometime last year.
The Mystic Ticket (for Lugia/Ho-oh, on Island 9) was given out at the opening of the Nintendo World Store, and at the San Diego Comic Con, Wizard World Chicago, and the Pokemon World Championships 2005. It is now available at Pokemon Rocks America 2005. You can also get Ho-oh in Colosseum, and Lugia in XD.
Jirachi was available through a bonus disc you got when you preordered Colosseum. It can also be obtained from the PAL version of Pokemon Channel. These two only work with R/S, however, so you’ll need to transfer the Jirachi to R/S and then trade to FR/LG.
Celebi has only been released in Japan as well, through their Colosseum Bonus Disc.
Mew can be obtained on Emerald, through the Old Sea Chart item, but this is another Wonderspot Pokemon that has not been released in the US yet.
I will add info on events as I get it. Please note that I'm not putting up info on events outside the US, as there are a bunch of them and it's hard to keep track.