piplup
Pokémon #393 in the National PokéDex, a Water type Starter Pokémon.
A penguin-like Pokémon which is one of the three default Pokemon the player chooses from in the Diamond and Pearl version of the franchise. Said to have a layer of down to protect them from extreme temperatures.
With Turtwig and Chimchar it is one of the three Sinnoh Starter Pokémon.
Japanese name: Pochama (ポッチャマ)
It evolves into Prinplup