Arbok is a serpentine, reptilian Pokémon with purple scales over most of its body. It has lost the rattle it had on its tail as an Ekans. Like a cobra, it can spread out its ribs into a hood, though they always seem to be in this position. On its "hood", it has a design much like an angry face. Studies on the aforementioned design have confirmed that there are six variations.
It has a nasty bite with deadly venom. Terrifically strong, it is capable of crushing opponents by coiling its body around them and constricting. It can even flatten steel oil drums. If it encounters an enemy, it raises its head, intimidating the opponent with the frightening pattern on its body and making eerie sounds by expelling air from its mouth. If any part of Arbok's body except for the head is cut off, it can regrow the rest of its body again in a matter of a few weeks. It shares this trait with Onix. It also has the ability to detect vibrations. Arbok are also capable of spending long periods underwater and surviving in aquatic environments.
Rather vicious, Arbok are territorial. They lash out at intruders with long fangs tipped with deadly venom. With a vengeful nature, it will not give up a chase once it targets its prey or an opponent, no matter how far.
Arbok live in grassy savannas and plains. It is native to Kanto and Johto.
In the wild, Arbok are hunters of smaller Pokémon, using the pattern on its hood to immobilize prey and using its venom to finish them off.
This Pokémon was unavailable prior to Generation I.