Rhyhorn (Japanese: サイホーン Sihorn) is a dual-type Ground/Rock Pokémon. It evolves into Rhydon starting at level 42, which evolves into Rhyperior when traded holding a Protector.
Rhyhorn is a small rhinoceros-like creature with a body consisting of gray, rocky plates. It has a ridge on its back, and visible fangs protruding from its upper jaw. Rhyhorn has four short legs with two claws. Its head is triangle-shaped with a single, short horn. Rhyhorn has small triangular openings on the sides of its head, which can be presumed to be ears.