| Pokedex Entries: |
| Gold | It traps enemies with its suction cupped tentacles then smashes them with its rock-hard head. |
| Silver | It instinctively sneaks into rocky holes. If it gets sleepy, it steals the nest of a fellow OCTILLERY. |
| Crystal | Its instinct is to bury itself in holes. It often steals the nesting holes of others to sleep in them. |
| Ruby | OCTILLERY grabs onto its foe using its tentacles. This POKéMON tries to immobilize it before delivering the finishing blow. If the foe turns out to be too strong, OCTILLERY spews ink to escape. |
| Sapphire |
| Emerald | It ensnares its foe with its suction-cupped tentacles before delivering the finishing blow. If the foe turns out to be too strong, it spews ink to escape. |
| FireRed | It instinctively sneaks into rocky holes. If it gets sleepy, it steals the nest of a fellow OCTILLERY. |
| LeafGreen | It traps enemies with its suction cupped tentacles then smashes them with its rock-hard head. |
| Diamond | It lives in the gaps of boulders and in holes on the seafloor. Its suction cups grip prey tightly. |
| Pearl | It obscures its foe's vision by spitting a cloud of murky ink. It makes its nest among boulders. |
| Platinum | It loves to lurk inside holes in rocks. It sometimes sprays ink on prey by sticking out only its mouth. |
| Stadium 2 | It traps enemies with its suction cupped tentacles then smashes them with its rock-hard head. |
| TCG | Dark Octillery: It likes to sleep in rock cave and will even steal other Octillery's nests. |
