Impossible without migration from a GBA game that received it from the RARE Pokemon Colosseum bonus disc. The bonus disk was gotten from preorders in Japan, and maybe the U.S.
you need Pokemon channel for gamecube and you get Jirachi as a bonus.
celebi you have to trade over from a different Pokemon game and jirachi you can get by cheats or you can get him by Nintendo event
you dont
You cannot get a Mewtwo in Platinum.
just trade from someone else
counting cheats its 34 without cheats 22
you do not catch purge in diamond pearl or platinum. Purge is a fan created pokemon.
there was a code to fill in missing numbers for the pke dex but it would completely mess up your game.
Sorry, you cannot obtain Jirachi in Diamond Version without the use of cheats. You can obtain it via Pokemon Colosseum pre-order disc though.
Pokemon Channel, Pokemon Colosseum Bonus Disk, or Nintendo event.
im afraid it is not possible but you can stilll get shaymin,heatran and cresslia without cheats
without cheats you would have to migrate