Its been proven that you can't get jirachi OR deoxys through capture unless you are at a
nintendo event.

Jirachi is obtained through the Colesseum Bonus Disc, NOT through Nintendo Events!

I was thinking about Deoxys at the time.
I forgot about the PokemonColleseum bonus disc.

u can get them by go to space in the town that has to gym leaders. the man will say
something like a number of rockets that went to space if he says yes he will ask u to go
to space with him there shall be deoxys and jirachi there

yes it is