with mystery gift
No, you cannot get Jirachi in Pokemon platinum.
No, it is inpossible to catch Jirachi on Diamon, Pearl or Platinum.
You need to have Dialga, Garitina and Plakia in your party and then just go to route 201 and you will see a level 50 jirachi
There Will Be A Upcoming Pokemon Event And It Is About Jirachi.
You will get the Jirachi... that's a little obvious. When you transfer Jirachi (Obtained from Gamestop), you will get Jirachi, and a special Pokewalker course called Night Sky's Edge. It has a variety of Pokemon and items you can obtain on the pokewalker.
You r@pe him DO what YOU want TO DO with Jirachi do you have to ask that??
you trade it from other games
it's a game not a thing you can get (PS if you do get it you can take the code from the game when you get jirachi and you can put jirachi on Pokemon platinum) X24
Jirachi only gives a wish on the movie.
Jirachi learns Trick by 1 of the Move Tutors in Pokémon Platinum, HeartGold or SoulSilver teaching it to it (Jirachi.)
The only legit way to obtain Jirachi is through a Nintendo event.
with action replay, but I don't remember the code.