It's not possible to get jirachi unless you get it from the special disc of Pokemon colosseum.
ruby, sapphire, emerald, fire red, leaf green
Use a gameshark code that is the only way
jirachi is on the first route but is very rare i dont know the others though.
You can catch Groudon,Rayquaza,Latios,Deoxys,Celebi,Jirachi,regiice,regirock,registeel,and Mew
Jirachi cannot be caught in Pokemon Diamond. It can, however, be transferred from Ruby, Sapphire, or Emerald, assuming you got it from a Nintendo event.
Migrate it from ruby,saphire, et cetera via the ds transfer system.
If I remember right, its Latios,Rayquaza,Deoxys,Jirachi, and Groudon.
Currently, Jirachi is not obtainable through traditional methods in Pokemon Ruby Version.
You can't. You can only get jirachi in ruby and sapphire. You would have to trade from ruby or sapphire.
the Unobtainable Pokemon in RSEFRLG are Celebi, Mew, Jirachi, Deoxys, and 000 (Missingno. ( DO NOT ATTEMPT TO CATCH))
You can't get jirachi in ruby unless you receive it from the Pokemon colosseum bonus disc.
You cannot capture Jirachi on Soulsilver but you can migrate one from Pokemon Emerald, Ruby, or Sapphire which you had to have obtained from an event awhile ago. Unless you have something like Action Replay.