Anyone comparing Arckarp to a Magikarp or even calling it a weakling will be met with divine retribution. This Pokémon is born with the ego and temperament of a divine being. It is nearly impossible to tame or to train it to follow any command.
Its swimming muscles are weak, so it is easily washed away by currents. It is described in mythology as the Pokémon that shaped the universe with its 1,000 arms.