You can't catch a Deoxys in Pokémon Platinum, or in any other Pokémon game. It can be obtained only through a official Nintendo event.
You would need to use an Action Replay or transfer it from Pokemon Emerald, FireRed, or LeafGreen, for it is impossible to catch Deoxys in any location in Pokemon Diamond, Pearl, and Platinum.
latios,latias and i think tauros cause i got a legendary Pokemon tin and it showed tauros deoxys raikou on there. some semi legendary Pokemon are rotom (from platinum and Pokemon p/d) lucario (from Pokemon platinum and p/d) (latios and latias are fully legendary Pokemon) hope i helped im 90% im right.
sadly you can't.
Heatran is a ledgendary in Pokemon platinum.
Deoxys doesn't come from a fossil, and can only be found through events from generation 3 games. If you want Deoxys in Diamond, you will have to migrate one through the pal park after you beat the Pokemon league.
If You Want A Deoxys In Pokemon Platinum ,Migrate,Trade,Or Use The Action Replay Pokemon Modifier.
There is no deoxys in Pokemon platinum... u could only migrate to pal park from 3rd generation. :)
no nobody in Pokemon platinum have a doexys.
There are a few ways that you could get a shiny Deoxys in Pokemon Platinum. One way would be to get someone who has hacked one to trade.
u will have to get an action replay and find the code online for Deoxys.
migrate it from Pokemon fire red version
You need to migrate it from FireRed, LeafGreen, or Emerald. But if you have a Deoxys in Pokemon Ruby or Sapphire, then you can migrate from them to Pal Park.
If you have Deoxys in the Pokedex, you can find it in the GTS if anyone's trading one.
you cant
go to pal park
It is completely impossible to get Deoxys in Pokemon Diamond, Pearl, Platinum, Heartgold or Soulsilver. Deoxys has not yet been distributed in any event and there is no hack into getting it. Furthermore, there is no way of getting a Deoxys in these games listed above.
deoxys is an event pokemon. that event passed forever ago