Piplup is a starter Pokemon if you didn't choose it have a friend trade you it.
Piplup is obtained as a starter in Diamond and Pearl or through trades.
You cant get a piplup mask on Pokemon Diamond or Pearl u can get it but i don't know how
Breed your piplup with a ditto. Or breed a femle piplup with another Pokemon from the same egg group as piplup.
Piplup evolves at lv. 16
Turtwig (grass) Chimchar (fire) Piplup (water)
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!"
breed a ditto with a piplup, a prinplup, or an empoleon. or breed 2 piplup, prinplup, or empoleon.
The only ways to get piplup are by picking it as your starter, trading, or breeding
Piplup will attempt to evolve once it reaches Level 16.
According to the Diamond and Pearl Pokedex book, Piplup is number 393.
Nowhere. You can't.
Choose it as your Starter Pokemon.