It has never been said but there is a rumor it has something to do with ash,just go here http://serebii.net/movies/jirachi/pics18.shtml and scroll down the page to see.
Jirachi
One of my friends told me you can get jirachi at the end of Mt. Moon and I have tried but I can't figure out how to get there. I do believe there is a jirachi in heart gold version because there are sinnoh Pokemon in it and I have found mewtwo. In gold version however, jirachi cannot exist for gold version was made before jirachi was. I wish you luck in finding the legendary jirachi and other Pokemon!
It is genderless like the other legendaries, except Heatran, Cresselia, Latias, and Latios, but in the movie, Jirachi is voiced by a female actress, just like Kayzie Rodgers (4-Kids Dub).Despite this:Jirachi is a Boy Pokemon in The English Dub of Jirachi's Wish Maker.and, Jirachi is a Girl Pokemon in The Brazilian Portuguese Dub of Jirachi's Wish Maker (Brazilian Portuguese: Pokémon 6: Jirachi - Realizador de Desejos).In Pkmn Mystery Dungeon(Japanese version) Jirachi's a boy, so.....
You cannot make Jirachi give you a wish in Pokémon White.
It has never been said but there is a rumor it has something to do with ash,just go here http://serebii.net/movies/jirachi/pics18.shtml and scroll down the page to see.
Jirachi only gives a wish on the movie.
jirachi (:
Jirachi
No, you can't start with a Jirachi.
jirachi the wish maker
Beat Jirachi
You use it to get to Jirachi.
jirachi is found at the end of wish cave
Go to wish cave with a wish stone and tak the best Pokemon for wish cave that are raikou suicune and entei then tkae your friend bow beat jirachi and he will join your team 99.9%
Cressila and Jirachi I think
Celebii is not in Wish cave, but Jirachi is. Jirachi is located at the 99th floor.