Breed your piplup with a ditto. Or breed a femle piplup with another Pokemon from the same egg group as piplup.
Turtwig (grass) Chimchar (fire) Piplup (water)
You cant get a piplup mask on Pokemon Diamond or Pearl u can get it but i don't know how
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 evolves at lv. 16
Piplup is a starter Pokemon if you didn't choose it have a friend trade you it.
Choose it as your Starter Pokemon.
piplup
The starter pokemon for Diamond and Pearl are Turtwig, Piplup, and Chimchar.
they are chimchar, piplup and turtwig
you get piplup as a starter in Pokemon diamond/pearl/platinum
Turtwig Chimchar Piplup