As it grows, the stone portions of its body harden to become similar to a diamond, but colored black.
Blue
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 50 mph 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.
Ruby
ONIX has a magnet in its brain. It acts as a compass so that this POKéMON does not lose direction while it is tunneling. As it grows older, its body becomes increasingly rounder and smoother.
Sapphire
Emerald
There is a magnet in its brain that prevents an ONIX from losing direction while tunneling. As it grows older, its body becomes steadily rounder and smoother.
FireRed
It usually lives underground. It searches for food while boring its way through the ground at 50 miles per hour.
LeafGreen
As it grows, the stone portions of its body harden to become similar to a diamond, but colored black.
Diamond
When it travels underground, it causes rumbling and tremors. It can move at 50 mph.
Pearl
It squirms through the ground using its long and rugged body. It always eats while burrowing.
Stadium 1
Its large body is over 26 feet long. Despite its size, it can squirm its way through the ground at 50 mph.
Stadium 2
It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way.
TCG
Onix: This Pokémon burrows through the earth at high speed, looking for food. The tunnels it digs are used by Digletts as nests.
