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.
So far, the only way to get Deoxys in Pokemon Platnum (or in any Pokemon game for that matter) has been through Nintendo events.
If you mean, de-evolutionary items, they don't exist. However, a Pokemon CAN hold an everstone, which prevents evolution (while holding it).
all you hav to do is go to game stop, and they will have a ds download play and you use your ds, and then you will receive it
There is no rental Pokemon in in Pokemon platinum
You cant get Pokemon from Pokemon ranger to platinum!
how to get a togepi in Pokemon platinum
There is no grunt that you can give a Pokemon to in Pokemon platinum.
buy the Pokemon platinum book
yes there is a new Pokemon in Pokemon platinum. its name is Arcues.
The 151st Pokemon is Mew and is unobtainable in Pokemon Platinum.
That pokemon is Azumarill in pokemon platinum in the national pokedex
In the National Pokedex in Pokemon Platinum Mawile is Pokemon 303.