Trade them from other versions
no
No.
Piplup is a starter Pokemon in Pokemon Pearl. you can get him early in the game as your starter Pokemon.
The starter pokemon for Diamond and Pearl are Turtwig, Piplup, and Chimchar.
No, you need to trade or transfer them from Emerald.
No.
No. But you can trade and get all three starters. N&L
you can't
trade or use action replay or a RSPG card
no only 1 starter
your starter Pokemon if you can
you cannot get another starter Pokemon in Pokemon pearl because professer rowan only lets you keep one starter Pokemon......so that means the only way to get another starter Pokemon is to trade it with someone. P.S.trust me,no one is going to trade you there ONLY starter Pokemon!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!