you can't!
simple as that.
You cant get Pokemon from Pokemon ranger to platinum!
you can only get him in pokemon ranger
no
no its only the old Pokemon ranger and diamond and pearl
Trade from Pokemon Ranger as an egg.
He's in a Pokèmart
By Pokemon ranger/Pokemon ranger shadow of almia or by Pokemon modifier action replay code
You cannot become a Pokemon Ranger in the Platinum game. The only way you can play as a ranger is if you're playing the Pokemon Ranger games.
Pokemon platinum' Pokemon ranger shadows of almia
There is no trainer in Pokemon Platinum with a Manaphy. However, you can trade with someone who has a Manaphy, or complete the special Ranger mission in Pokemon Ranger and transfer the Manaphy egg over to Pokemon Diamond, Pearl, or Platinum.
The only way to get manaphy without Pokemon ranger is to get it from a Nintendo event.
You need a Pokemon Ranger game.