>>45663764Tyranitar would be better today, but worse historically and have no niche in the game over Rhyperior.
Dark/Rock have no synergy at all. All that typing does is determine what Tyranitar checks, and historically Psychic types needed a Dark-type check like Tyranitar to keep the meta from turning into Gen 1 psychic spam. Even today, there are no Dark-type physical tanks in the game. Hydreigon is the other Dark-type pseudo but it has mediocre bulk by comparison:
>252 SpA Choice Specs Greninja-Ash Dark Pulse vs. 0 HP / 4 SpD Hydreigon: 120-141 (36.9 - 43.3%) -- guaranteed 3HKO after Stealth Rock>252 SpA Choice Specs Greninja-Ash Dark Pulse vs. 0 HP / 4 SpD Tyranitar in Sand: 73-87 (21.4 - 25.5%) -- 99.7% chance to 4HKO after Stealth RockLosing Pursuit and the nerf of the Dark type means Tyranitar can't really do anything at stopping Psychics or Ghosts.
But the STAB Earthquake doesn't really do anything for it beyond not missing. It's a weaker EQ than Lando or Rhyperior and is even easier to punish since Tyranitar isn't as physically bulky as those other Ground types (or even Hippo).
If you want to buff Tyranitar you should restat it, starting with getting rid of its high Special Attack.
