What is the best nature for a Piplup?

[- Cyndaquil -]

That I will eventually evolve into a Prinplup and then Empoleon?

 

[Azonic]

Its modest always. Its most common as special sweeper(sort of) so use Modest

 

[- Cyndaquil -]

Okay thanks and can you also recommend me a moveset and stats for when I evolve it into Empoleon?

 

[Samson]

i use bold and use it as a bulky srocker.

 

[Barboach]

Either modest if you want to go for Sp. Attacking purposes, or Naughty if you want him to be an attacker.