You can't. You'll either have to choose turtwig or piplup as your starter, or trade for them via wi-fi.
You cannot catch Piplup in any game.
Piplup is a starter Pokémon so it cannot be caught.
you cant catch piplup on Pokemon platinumif you want to get it you have to: · use ar cheat·start the game again so he could be your starter Pokemon·trade
in the begining of the game the profeser will give you three Pokemon and you have to pick one the three Pokemon are chimchar,piplup and turtwig.
U can't catch prinplup u only can evolve it from piplup and to get piplup is to cheat or at the start of the game u choose piplup as the starter hope this helped :)
You can't catch a piplup in soulsilver
If you chose Chimchar, use chimchar If you chose Turtwig, catch a starly and train it If you chose Piplup, use piplup's peck but if that doesn't work, catch a starly and train it.
You have to trade it from games Diamond, Pearl and Platinum.
You can't catch a Piplup in the wild, the only way is to choose it as a starter or send it from another D/P/Pt version that chose it as starter. Or if you have an action replay you can use the code steal other players Pokemon and face a girl by the rode to eterna forest that has a piplup and steal her Pokemon. Or if you have the full Pokemon modifier code you can type in the national pokedex number for it and the level you want it and then you can get a piplup. Same with other Pokemon. P.S. you don't actually steal their Pokemon, you get a copy of it.
at the begining of the game the profeser will give you three Pokemon and you have to pick one and those three Pokemon are turtwig chimchar and piplup and if you want turtwig pick turtwig.
how do you catch a mewtwo on Pokemon platinum
you cannot catch the 3 regi's in Pokemon platinum you have to catch them in Pokemon emerald then transfer them to Pokemon platinum. thnx