Just a drop of the poison in Arcpede's claws is said to be able to fell legendary Pokémon in seconds. It stays curled up most of the time, and forcing it to stand tall and turn aggressive is considered extremely foolish.
Highly aggressive, it uses the claws near its neck to dig into its opponents and poison them. It is described in mythology as the Pokémon that shaped the universe with its 1,000 arms.