Petilil is a plant-like, Grass-type Pokémon, primarily light green in coloration. Her head's rounded shape and striations causes her to resemble a plant bulb, such as an onion. Her head is tipped with three oblong leaves, and her crescent-shaped white face, seemingly lacking of a nose or mouth, has brown eyes shaped like elongated, vertical ovals. A green "bib" feature is present on her neck, and her lower body consists of light green ruffles.