Appearance
A very long silvery-gray rock serpent, its segments chipped and scraped. Three sections bear long spikes; the huge head is mostly a wide jaw of square teeth, and the tail ends in a blunt cone.

#208
Iron Snake Pokémon
Steelix is a Steel / Ground-type Pokémon, No. 208 in the National Pokédex, introduced in Generation 2 (Johto region).
« This Pokémon evolved through use of a strange item. Its body is coated with steel powder and notably hard—not even diamond can leave so much as a scratch. »
A very long silvery-gray rock serpent, its segments chipped and scraped. Three sections bear long spikes; the huge head is mostly a wide jaw of square teeth, and the tail ends in a blunt cone.
It burrows farther than Onix, toward the world's core. Heat, pressure, and iron make its body harder than diamond. Onix becomes Steelix after about a hundred years. It can Mega Evolve.
The species debuts with Jasmine: she helps Ash stop Team Rocket from stealing Pikachu, then loses to Cyndaquil. Ash wins the Mineral Badge.
Like Onix, it suggests a snake and earthworm, or a burrowing dragon, the bergstutz. Steelix blends steel, helix, and Onix or onyx.