Piplup is a light-blue, penguin-like Pokémon, which is covered in thick down to insulate against the cold. It has a dark blue head with a primarily white face and a short, yellow beak. The dark blue feathers on its head extend down its back and around its neck, which causes it to appear to be wearing a cape. There are two white ovals on its chest and a small, light-blue marking resembles a crown above its beak. It has flipper-like arms and yellow feet with three toes each.
Piplup has a strong sense of self-pride. Because of its pride, it has a hard time accepting food from humans and bonding with its caretakers. It will even puff out its chest after it falls down, which it often does due to its poor walking abilities. However, it is a skilled swimmer that can dive for over ten minutes in order to hunt. It has also been shown to fly short distances in the anime. It lives along the seashore in colder climates.
A Piplup owned by Rowan appeared in SS024, where a new Trainer named Shinko was picking a starter Pokémon. It fought with Rowan's Chimchar after it stole its food; this led to a window breaking and Piplup and Chimchar escaping. They were then captured by an Ariados's web before being rescued by Shinko and Dawn.
Hareta randomly selects Piplup to battle the enraged Onix in In Search of the Legendary Pokémon Dialga!!. After their first encounter with Onix, Hareta chooses Piplup as his first Pokémon. Piplup is originally disobedient to Hareta, but listens to him in order to defeat the Onix in their second battle.
On being released from a Poké Ball, Piplup slides along the stage using Surf. Anyone caught in it will be pushed until Piplup disappears, or pushes the character off the stage. Piplup will keep using Surf even when off the stage.
A Penguin Pokémon. It's one of the starter Pokémon received from Professor Rowan when the player departs from the Sinnoh region. It's a Water type, so it's strong versus Rock and Grounds. It's very cute but filled with pride--it hates to accept food from people. When it levels up, it evolves into Prinplup.
You wouldn't think it from its adorable exterior, but this Pokémon is very proud and often won't listen to its Trainer. When it walks on land, it waddles and even falls over sometimes, all in a suitably cute way, but once it's in the water you'll see its true potential. It's a skilled swimmer and can dive for over ten minutes at a time to hunt.
Piplup returns in PokéPark 2: Wonders Beyond where he and Pikachu arrive at a new PokéPark. They venture into the Wish Park together and try to save some of the Pokémon trapped there. Piplup inevitably becoming trapped in the Wish Park after saving Pikachu and Oshawott's lives. He is later found by Zorua and Zoroark and announces that he wishes to stay in Wish Park so he can help the Pokémon who are coaxed into coming. Piplup is later taken by Gothitelle in exchange for setting Victini free, where he is then manipulated by Darkrai. Piplup later awakens Pikachu from Darkrai's nightmare and encourages Pikachu to seek out his missing friends after their memories were taken by Darkrai right before the final battle.
This Pokémon was unavailable prior to Generation IV.