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Pineco is a blue-green, pinecone-like Pokémon with red eyes and no visible limbs. It has a single spike on top of its head, which is supposedly its stem. It makes its shell thicker by gluing tree bark to its body. The glue is made of fluid that Pineco spits out, which hardens when it is exposed to air. Unbothered by the added weight of its shell, it patiently hangs from a tree branch to wait for flying insect prey. Typically immobile, it will drop to the ground and explode if someone shakes its tree while it is eating.