You cant
No
The Pickachu in Pokemone Platinum is in the Trophy Garden.
Event
you cant you have to migrate to get celibe
you need to go to a wi-fi event to get celibi
you can't catch him in platinum but in soulsilver or heartgold you can catch him then trade it to platinum.
i dont know wich one it is but you can ether get celibe or mew by colecting all 28 unown
just send celibe as a mystory gift to anthor ds and resive celibe
how do you catch a mewtwo on Pokemon platinum
you cannot catch the 3 regi's in Pokemon platinum you have to catch them in Pokemon emerald then transfer them to Pokemon platinum. thnx
No, it is inpossible to catch Jirachi on Diamon, Pearl or Platinum.
you can't catch a zorua in Pokemon platinum unless you hack.