Ferrothorn is a large metallic Pokémon with a saucer-shaped body covered in green spines. It somewhat resembles a flattened durian fruit. Its metallic body is covered in sharp green thorns. It has three black stripes encircling its body; the middle stripe located below its eyes, is triangular. Its eyes have green rims, yellow scleras, and black pupils. There is a green spike at the top of its head. Long, thin green vine-like appendages tipped with spiky metal disks extend around it. Ferrothorn uses these spiny metal appendages to cling to ceilings of its cave habitat, or walk by slowly shuffling.