Japanese Name: Iwakuu
Type: Rock/Ground
Species: Rock Snake
Height: 28'10"
Weight: 463lbs
Evolution: Evolves into Steelix when traded with a Metal Coat
-Red/Blue: As it grows, the stone portions of its body harden to become similar to a diamond, but colored black.
-Yellow: Burrows at high speed in search of food. The tunnels it leaves are used as homes by Digletts.
-Gold: It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way.
-Silver: It rapidly bores through the ground at 50mph by squirming and twisting its massive, rugged body.
-Crystal: As it digs through the ground, it absorbs many hard objects. This is what makes its body so solid.
-Stadium: Its large body is over 26 feet long. Despite its size, it can squirm its way through the ground at 50 mph.
-Ruby/Sapphire: Onix has a magnet in its brain. It acts as a compass so that this pokemon does not lose direction while it is tunneling. As it grows older, its body becomes increasingly rounder and smoother.