in the begining of the game If you want a piplup and a turtwig or chimchar I suggest trading.
You cannot catch Piplup in any game.
Piplup
Turtwig, Chimchar, and Piplup.
Chimchar, piplup, and turtwig.
you get piplup as a starter in Pokemon diamond/pearl/platinum
turtwig,chimchar,and piplup
Piplup,Chimchar,Turtwig
turtwig chimchar piplup
pick it as your starter
Usually at target you can find a piplup doll in the Pokemon section. If you are asking 'Where can you find a Piplup in the Pokemon game?' you need the ds games Pokemon Diamond, Pokemon Pearl, or Platinum.
when you start the game you can choose a piplup or chimchar or tutwig.
It's a starter Pokemon from Professor Rowan in Sinnoh