This Pokémon is terrifically strong in order to constrict things with its body. It can even flatten steel oil drums. Once Arbok wraps its body around its foe, escaping its crunching embrace is impossible. To intimidate foes, it spreads its chest wide and makes eerie sounds by expelling air from its mouth. The pattern on its belly appears to be a frightening face. Weak foes will flee just at the sight of the pattern.
Pokédex entry #24
arbok in Pokémon GO
It's possible to hatch arbok from an egg?
No, arbok can't be hatched.
Which are arbok’s strengths and weaknesses?
arbok is a poison type Pokémon. poison type pokémons are strong against grass, bug, fairy pokémons but weak against poison, ground, rock, ghost pokémons. They are not affected by steel type pokémons.