Flapple is a green, worm-like dragon Pokémon with a light green underside and yellow eyes. It uses parts of an apple to form its body. The top part of the apple sits on the top of its head, with a single horn sticking out; the bottom of the apple is attached to its tail; and the sides are attached to its limbs, which have three-fingered hands, allowing them to act as wings.
Flapple's cheeks store acid strong enough to induce chemical burns and corrode metal. It can attack by spitting this acid.