| Pokedex Entries: |
| Gold | Its entire body is shielded by a steel-hard shell. What lurks inside the armor is a total mystery. |
| Silver | It remains immovably rooted to its tree. It scatters pieces of its hard shell to drive its enemies away. |
| Crystal | Usually found hanging on to a fat tree trunk. It shoots out bits of its shell when it sees action. |
| Ruby | FORRETRESS conceals itself inside its hardened steel shell. The shell is opened when the POKéMON is catching prey, but it does so at such a quick pace that the shell's inside cannot be seen. |
| Sapphire |
| Emerald | It keeps itself inside its steel shell. The shell is opened when it is catching prey, but it is so quick that the shell's inside cannot be seen. |
| FireRed | It remains immovably rooted to its tree. It scatters pieces of its hard shell to drive its enemies away. |
| LeafGreen | Its entire body is shielded by a steel-hard shell. What lurks inside the armor is a total mystery. |
| Diamond | It is encased in a steel shell. Its peering eyes are all that can be seen of its mysterious innards. |
| Pearl |
| Stadium 2 | Its entire body is shielded by a steel-hard shell. What lurks inside the armor is a total mystery. |
| TCG | Dark Forretress: It stays motionless in tree, driving away with flying armored shards from its hard shell any who come close. |
