Pokémon #548 in the National PokéDex, a Grass type Pokémon.
Petilil is a plant-like Pokémon that resembles a plant bulb, such as an onion. It is primarily light green. Its head is tipped with three oblong leaves that are very bitter. However, these leaves possess revitalizing effects. Its crescent-shaped white face, seemingly lacking of a nose or mouth, has brown eyes shaped like elongated ovals.