In outer space after getting 5 (five) stars on your trainer card.
find it.
No.
Cheating
No but you can get one from the preview disc for Pokemon colosseum and only from that unless you cheat.
Trade from Pokemon colosseum
There is no jirachi's cave.
Jirachi is a distrubtion pokemon that is not obtainable anymore unless by trading or cheating (gameshark)
A shiny Jirachi can be very rarely obtained from using the Pokemon Colosseum bonus disc repeatedly to find Shiny Jirachi. Once it is obtained, you can migrate it from Pokemon Ruby, Sapphire, or Emerald to the Pal Park.
you need Pokemon channel for gamecube and you get Jirachi as a bonus.
I assume you mean jirachi. Jirachi is an event pokemon and is no longer obtainable in the U.S. through any means other than hacking.
you can only get jirachi by a special event, which is obviously long gone now.
If you have the Pokemon Colosseum Bonus Disc for the Gamecube and Pokemon Ruby or Sapphire (and a special cable), you can download Jirachi onto one of those games and trade it to Emerald. I also hear you can get Jirachi on Pokemon Channel and send it to your games. Other than that, you have to cheat. :(