Krank is Moc Sullivan's dingo, and he is a snake. The species he is is unknown, but is generarly assumed that Krank is either a viper or a cobra. He is a long brown snake with darker markings, and who is seen in manga panels wearing a small crown upon his head. He can fan out his neck, which seems to indicate that he's a cobra. He remains in a pouch that's attached to Moc's right leg.