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If you are talking about the games, Piplup was introduced in Pokemon Diamond and Pearl... Piplup was introduced in the anime Pokemon Diamond and Pearl episode 1, titled "Following a Maiden's Voyage!"
Choose it as your Starter Pokemon.
The starter pokemon for Diamond and Pearl are Turtwig, Piplup, and Chimchar.
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.
Turtwig (grass) Chimchar (fire) Piplup (water)
The Piplup mask is an accessory for Pokemon contests. It is stored in your Fashion Case. Otherwise, it has no use whatsoever.
Sell it
Breed your piplup with a ditto. Or breed a femle piplup with another Pokemon from the same egg group as piplup.
If you are talking about the games, Piplup was introduced in Pokemon Diamond and Pearl... Piplup was introduced in the anime Pokemon Diamond and Pearl episode 1, titled "Following a Maiden's Voyage!"
Piplup is obtained as a starter in Diamond and Pearl or through trades.
Piplup is a starter Pokemon if you didn't choose it have a friend trade you it.
Piplup evolves at lv. 16
piplup
Choose it as your Starter Pokemon.
The Starter Pokemon masks depends on the Pokemon you choose from the start.Turtwig Mask - Jubilife City TV Station (Turtwig), Veilstone Department Store (Chimchar), or Pastoria City (Piplup)Chimchar Mask - Pastoria City (Turtwig), Jubilife City TV Station (Chimchar), or Veilstone Department Store (Piplup)Piplup Mask -Veilstone Department Store (Turtwig), Pastoria City (Chimchar), or Jubilife City TV Station. (Piplup)
The starter pokemon for Diamond and Pearl are Turtwig, Piplup, and Chimchar.