1 | Red, Blue | As it grows, the stone portions of its body harden to become similar to a diamond, but colored black. |
1 | Yellow | Burrows at high speed in search of food. The tunnels it leaves are used as homes by Diglett. |
1 | Stadium | Its large body is over 26 feet long. Despite its size, it can squirm its way through the ground at 50 mph. |
2 | Gold | It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way. |
2 | Silver | It rapidly bores through the ground at 50 mph by squirming and twisting its massive, rugged body. |
2 | Crystal | As it digs through the ground, it absorbs many hard objects. This is what makes its body so solid. |
2 | Stadium 2 | It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way. |
3 | Ruby, Sapphire | 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. |
3 | 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. |
3 | FireRed | It usually lives underground. It searches for food while boring its way through the ground at 50 miles per hour. |
3 | LeafGreen | As it grows, the stone portions of its body harden to become similar to black-colored diamonds. |
4 | Diamond | When it travels underground, it causes rumbling and tremors. It can move at 50 mph. |
4 | Pearl | It squirms through the ground using its long and rugged body. It always eats while burrowing. |
4 | Platinum | It burrows through the ground at a speed of 50 mph while feeding on large boulders. |
4 | HeartGold | It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way. |
4 | SoulSilver | It rapidly bores through the ground at 50 mph by squirming and twisting its massive, rugged body. |
5 | Black, White | It burrows through the ground at a speed of 50 mph while feeding on large boulders. |
5 | Black 2, White 2 | Opening its large mouth, it ingests massive amounts of soil and creates long tunnels. |
6 | X | Burrows at high speed in search of food. The tunnels it leaves are used as homes by Diglett. |
6 | Y | It usually lives underground. It searches for food while boring its way through the ground at 50 miles per hour. |
6 | Omega Ruby, Alpha Sapphire | 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. |
7 | Let's Go, Pikachu!, Let's Go, Eevee! | Burrows at high speed in search of food. The tunnels it leaves are used as homes by Diglett. |
8 | Sword | As it digs through the ground, it absorbs many hard objects. This is what makes its body so solid. |
8 | Shield | It rapidly bores through the ground at 50 mph by squirming and twisting its massive, rugged body. |