Celestial Storm·#71·2018
Onix, the formidable Rock Snake Pokémon, is an iconic Generation I creature, renowned for its immense size and rocky composition, making it a fan favorite since its debut. This specific Onix card from the 2018 Celestial Storm set is a common rarity, featuring dynamic artwork and strategic attack mechanics that stand out in gameplay. Here, you will discover Onix's Pokédex lore, detailed information on its attacks with their energy costs and effects, and its weakness, resistance, and retreat cost.
Read more ↓Onix, the Rock Snake Pokémon, is a colossal creature primarily composed of rock, first introduced in Generation I of the Pokémon franchise. Its immense size and formidable appearance have made it a memorable figure since its debut. Onix is known for its ability to tunnel through the earth at incredible speeds, often reaching depths of over 50 miles per hour as it searches for food, primarily consisting of large rocks and minerals that it consumes to harden its body. In the games, Onix evolves into Steelix when traded while holding a Metal Coat, showcasing a significant transformation into a Steel/Ground type. In the anime, Brock's Onix is a prominent and loyal companion, often serving as a powerful force in gym battles and critical moments, cementing its role as a fan favorite. Its pure Rock typing gives it a unique set of type matchups, being strong against Fire, Ice, Flying, and Bug types, but vulnerable to Water, Grass, Fighting, Ground, and Steel attacks. Onix's imposing presence and unique biology have contributed to its lasting cultural significance within the Pokémon universe, representing strength and endurance.
Last updated: April 11, 2026
