Piplup is a Water-type Pokémon introduced in Generation IV that evolves into Prinplup starting at level 16 and later into Empoleon starting at level 36. 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. So if it smiles at you that way like in our fanart Pokemon Piplup Smirk Sticker - it likes you.