You don't unless you evolve your piplup (level 16 i think). But, if you have a usb port and a usb wi-fi connection cord and do the set up, you can go to the gts and try to trade a Pokemon for a prinplup.
Hope I helped!
Prinplup evolves into Empoleon at level 36.
You choose it from the starter Pokemon. Then evolve it. Please recommend me. You can click on my name and go to my message board and ill give you more Pokemon answers. =)
buy the Pokemon platinum book
The 151st Pokemon is Mew and is unobtainable in Pokemon Platinum.
no you can't find a torchic egg in Pokemon platinum
try your best to find spirtomb in Pokemon platinum
There is not a route 233 on Pokemon platinum.
You cannot find zekrom in pokemon platinum
you find them in the cave
there is no such Pokemon
breed an electabuzz if you want an elekid in Pokemon platinum
You can't "find" him. You have to trade the egg from Pokemon ranger over to platinum, where you can hatch it.