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. It traps foes with the suction cups on its tentacles, then smashes them with its rock-hard head. It has a tendency to want to be in holes. It prefers rock crags or pots and sprays ink from them before attacking.
Pokédex entry #224
Octillery in Pokémon GO
It's possible to hatch Octillery from an egg?
No, Octillery can't be hatched.
Which are Octillery’s strengths and weaknesses?
Octillery is a water type Pokémon. water type pokémons are strong against fire, ground, rock pokémons but weak against water, grass, dragon, electric pokémons.