The lack of a recovery move in that moveset allows many Pokemon to 2HKO it, or have a chance to do so. Tyranitar can have a chance to 2HKO Hypno with Crunch, and Gengar can 2HKO Hypno. I would certainly stick to Grumpig for UU, and Tentacruel, Uxie or Cresselia for OU. Nevertheless, Hypno gains...