Nashok, Koghar's Partner, is a Unique Bogan Trapper found in The Hunter's Den in Act V of Diablo III. He spawns when players touch his trophies. Only one of the two (Koghar or Nashok) will appear.
In combat, he has Electrified, Desecrator and Nightmarish affixes. His retinue of Boggits and Trappers also comes to his aid.