Steelix

Steelix (Japanese: ハガネール Haganēru) is a /-type Pokémon introduced in Generation II.

Appearance
Steelix is a lustrous, silvery gray snake. They are about 30 feet long. Their body is made up of rock-like sections, three of which have massive rock spikes coming out of them. They have a massive head mainly made up of their jaw. The jaw is large and wide with sets of large square teeth inside. Along their bottom jaw are a pair of ridges (varies with gender). Their eye sockets are slightly set in, giving them good eye protection. Underneath their bottom jaw there are small square domes. Their heads have two long ridges going from the eyes up to the top of their heads. Their jaws also have massive ridges where they meet their skull. Their tail ends in a long sharp point, but with a blunt tip. Steelix's rock-like sections don't look perfect and can easily be mistaken for rocks, for they have many chips and scrapes all along them from fights and tunneling.

Evolution
Steelix can be obtained by making an Onix hold a Metal Coat and trading it.

Known trainers with a Steelix

 * Brock
 * Jasmine
 * Byron
 * Attila

Trivia

 * Steelix is the second largest Pokémon besides Wailord.
 * Steelix is the heaviest Generation II Pokémon.
 * Overall, Steelix is the fifth heaviest Pokémon at 400kg.
 * Steelix has the highest Base Defense out of all types and  types.
 * Steelix is the only non- type Pokémon that can learn Rock Polish.
 * Steelix and Altaria are the only Pokémon to change their Primary Type through evolution.
 * Strangly, both of them are part of a 2-stage Evolutionary Line that isn't affected by a certain type ( and respectively).
 * Also, 1 member of the Evolutionary Line isn't affected by 2 Types ( and for Steelix and  and  Swablu, Altaria's Pre-Evolution)
 * Steelix is the only Pokémon that evolves via trading that can also be caught in-game (HGSS).