Onix, a formidable Rock/Ground type Pokémon from Generation I, is a culturally significant creature known for its immense size and subterranean prowess, evolving into Steelix. This specific card, an Onix from the 2001 Southern Islands set, stands out as a non-holo promotional release within a unique 18-card collection. Here, visitors will find detailed Pokédex lore, a breakdown of its Slam and Body Slam attacks with their energy costs and effects, along with its weakness, resistance, and retreat cost, plus its edition history.
Read more ↓Onix, the Rock Snake Pokémon, is a colossal and imposing creature introduced in Generation I. It is a dual Rock/Ground type Pokémon, known for its immense size and powerful physical attacks. Onix is the pre-evolution of Steelix, evolving when traded while holding a Metal Coat. Its body is composed of several large boulders, hardened by the intense pressure from burrowing deep underground, giving it incredible durability. Onix is often found in mountainous regions, caves, and deep underground tunnels, where it carves out vast networks of passages. Its diet primarily consists of large rocks and minerals, which it grinds down to extract nutrients. In the Pokémon anime, Brock's Onix is one of his most iconic and reliable Pokémon, often serving as a formidable opponent in gym battles and a loyal companion. Onix's sheer scale and power have made it a fan favorite, embodying the raw strength and resilience of Rock-type Pokémon. Its design, reminiscent of a segmented earthworm or a Chinese dragon made of stone, contributes to its cultural significance as a symbol of endurance and natural power within the Pokémon universe.
Last updated: April 11, 2026
